微软的SQLHelper类(含完整中文注释)
代码
using
System;
using
System.Data;
using
System.Xml;
using
System.Data.SqlClient;
using
System.Collections;
namespace
Book.DAL
{
///
<summary>
///
SqlServer数据访问帮助类
///
</summary>
public
sealed
class
SqlHelper
{
#region
私有构造函数和方法
private
SqlHelper() {}
///
<summary>
///
将SqlParameter参数数组(参数值)分配给SqlCommand命令.
///
这个方法将给任何一个参数分配DBNull.Value;
///
该操作将阻止默认值的使用.
///
</summary>
///
<param>
命令名
</param>
///
<param>
SqlParameters数组
</param>
private
static
void
AttachParameters(SqlCommand command, SqlParameter[] commandParameters)
{
if
( command
==
null
)
throw
new
ArgumentNullException(
"
command
"
);
if
( commandParameters
!=
null
)
{
foreach
(SqlParameter p
in
commandParameters)
{
if
( p
!=
null
)
{
//
检查未分配值的输出参数,将其分配以DBNull.Value.
if
( ( p.Direction
==
ParameterDirection.InputOutput
||
p.Direction
==
ParameterDirection.Input )
&&
(p.Value
==
null
))
{
p.Value
=
DBNull.Value;
}
command.Parameters.Add(p);
}
}
}
}
///
<summary>
///
将DataRow类型的列值分配到SqlParameter参数数组.
///
</summary>
///
<param>
要分配值的SqlParameter参数数组
</param>
///
<param>
将要分配给存储过程参数的DataRow
</param>
private
static
void
AssignParameterValues(SqlParameter[] commandParameters, DataRow dataRow)
{
if
((commandParameters
==
null
)
||
(dataRow
==
null
))
{
return
;
}
int
i
=
0
;
//
设置参数值
foreach
(SqlParameter commandParameter
in
commandParameters)
{
//
创建参数名称,如果不存在,只抛出一个异常.
if
( commandParameter.ParameterName
==
null
||
commandParameter.ParameterName.Length
<=
1
)
throw
new
Exception(
string
.Format(
"
请提供参数{0}一个有效的名称{1}.
"
, i, commandParameter.ParameterName ) );
//
从dataRow的表中获取为参数数组中数组名称的列的索引.
//
如果存在和参数名称相同的列,则将列值赋给当前名称的参数.
if
(dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(
1
))
!=
-
1
)
commandParameter.Value
=
dataRow[commandParameter.ParameterName.Substring(
1
)];
i
++
;
}
}
///
<summary>
///
将一个对象数组分配给SqlParameter参数数组.
///
</summary>
///
<param>
要分配值的SqlParameter参数数组
</param>
///
<param>
将要分配给存储过程参数的对象数组
</param>
private
static
void
AssignParameterValues(SqlParameter[] commandParameters,
object
[] parameterValues)
{
if
((commandParameters
==
null
)
||
(parameterValues
==
null
))
{
return
;
}
//
确保对象数组个数与参数个数匹配,如果不匹配,抛出一个异常.
if
(commandParameters.Length
!=
parameterValues.Length)
{
throw
new
ArgumentException(
"
参数值个数与参数不匹配.
"
);
}
//
给参数赋值
for
(
int
i
=
0
, j
=
commandParameters.Length; i
<
j; i
++
)
{
//
If the current array value derives from IDbDataParameter, then assign its Value property
if
(parameterValues[i]
is
IDbDataParameter)
{
IDbDataParameter paramInstance
=
(IDbDataParameter)parameterValues[i];
if
( paramInstance.Value
==
null
)
{
commandParameters[i].Value
=
DBNull.Value;
}
else
{
commandParameters[i].Value
=
paramInstance.Value;
}
}
else
if
(parameterValues[i]
==
null
)
{
commandParameters[i].Value
=
DBNull.Value;
}
else
{
commandParameters[i].Value
=
parameterValues[i];
}
}
}
///
<summary>
///
预处理用户提供的命令,数据库连接/事务/命令类型/参数
///
</summary>
///
<param>
要处理的SqlCommand
</param>
///
<param>
数据库连接
</param>
///
<param>
一个有效的事务或者是null值
</param>
///
<param>
命令类型 (存储过程,命令文本, 其它.)
</param>
///
<param>
存储过程名或都T-SQL命令文本
</param>
///
<param>
和命令相关联的SqlParameter参数数组,如果没有参数为'null'
</param>
///
<param><c>
true
</c>
如果连接是打开的,则为true,其它情况下为false.
</param>
private
static
void
PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType,
string
commandText, SqlParameter[] commandParameters,
out
bool
mustCloseConnection )
{
if
( command
==
null
)
throw
new
ArgumentNullException(
"
command
"
);
if
( commandText
==
null
||
commandText.Length
==
0
)
throw
new
ArgumentNullException(
"
commandText
"
);
//
If the provided connection is not open, we will open it
if
(connection.State
!=
ConnectionState.Open)
{
mustCloseConnection
=
true
;
connection.Open();
}
else
{
mustCloseConnection
=
false
;
}
//
给命令分配一个数据库连接.
command.Connection
=
connection;
//
设置命令文本(存储过程名或SQL语句)
command.CommandText
=
commandText;
//
分配事务
if
(transaction
!=
null
)
{
if
( transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
command.Transaction
=
transaction;
}
//
设置命令类型.
command.CommandType
=
commandType;
//
分配命令参数
if
(commandParameters
!=
null
)
{
AttachParameters(command, commandParameters);
}
return
;
}
#endregion
私有构造函数和方法结束
#region
ExecuteNonQuery命令
///
<summary>
///
执行指定连接字符串,类型的SqlCommand.
///
</summary>
///
<remarks>
///
示例:
///
int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本, 其它.)
</param>
///
<param>
存储过程名称或SQL语句
</param>
///
<returns>
返回命令影响的行数
</returns>
public
static
int
ExecuteNonQuery(
string
connectionString, CommandType commandType,
string
commandText)
{
return
ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定连接字符串,类型的SqlCommand.如果没有提供参数,不返回结果.
///
</summary>
///
<remarks>
///
示例:
///
int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本, 其它.)
</param>
///
<param>
存储过程名称或SQL语句
</param>
///
<param>
SqlParameter参数数组
</param>
///
<returns>
返回命令影响的行数
</returns>
public
static
int
ExecuteNonQuery(
string
connectionString, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
using
(SqlConnection connection
=
new
SqlConnection(connectionString))
{
connection.Open();
return
ExecuteNonQuery(connection, commandType, commandText, commandParameters);
}
}
///
<summary>
///
执行指定连接字符串的存储过程,将对象数组的值赋给存储过程参数,
///
此方法需要在参数缓存方法中探索参数并生成参数.
///
</summary>
///
<remarks>
///
这个方法没有提供访问输出参数和返回值.
///
示例:
///
int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接字符串/param>
///
<param>
存储过程名称
</param>
///
<param>
分配到存储过程输入参数的对象数组
</param>
///
<returns>
返回受影响的行数
</returns>
public
static
int
ExecuteNonQuery(
string
connectionString,
string
spName,
params
object
[] parameterValues)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果存在参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从探索存储过程参数(加载到缓存)并分配给存储过程参数数组.
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数情况下
return
ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定数据库连接对象的命令
///
</summary>
///
<remarks>
///
示例:
///
int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型(存储过程,命令文本或其它.)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<returns>
返回影响的行数
</returns>
public
static
int
ExecuteNonQuery(SqlConnection connection, CommandType commandType,
string
commandText)
{
return
ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库连接对象的命令
///
</summary>
///
<remarks>
///
示例:
///
int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型(存储过程,命令文本或其它.)
</param>
///
<param>
T存储过程名称或T-SQL语句
</param>
///
<param>
SqlParamter参数数组
</param>
///
<returns>
返回影响的行数
</returns>
public
static
int
ExecuteNonQuery(SqlConnection connection, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
//
创建SqlCommand命令,并进行预处理
SqlCommand cmd
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(cmd, connection, (SqlTransaction)
null
, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
Finally, execute the command
int
retval
=
cmd.ExecuteNonQuery();
//
清除参数,以便再次使用.
cmd.Parameters.Clear();
if
( mustCloseConnection )
connection.Close();
return
retval;
}
///
<summary>
///
执行指定数据库连接对象的命令,将对象数组的值赋给存储过程参数.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值
///
示例:
///
int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回影响的行数
</returns>
public
static
int
ExecuteNonQuery(SqlConnection connection,
string
spName,
params
object
[] parameterValues)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
给存储过程分配参数值
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行带事务的SqlCommand.
///
</summary>
///
<remarks>
///
示例.:
///
int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型(存储过程,命令文本或其它.)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<returns>
返回影响的行数/returns>
public
static
int
ExecuteNonQuery(SqlTransaction transaction, CommandType commandType,
string
commandText)
{
return
ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行带事务的SqlCommand(指定参数).
///
</summary>
///
<remarks>
///
示例:
///
int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型(存储过程,命令文本或其它.)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
SqlParamter参数数组
</param>
///
<returns>
返回影响的行数
</returns>
public
static
int
ExecuteNonQuery(SqlTransaction transaction, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
//
预处理
SqlCommand cmd
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
执行
int
retval
=
cmd.ExecuteNonQuery();
//
清除参数集,以便再次使用.
cmd.Parameters.Clear();
return
retval;
}
///
<summary>
///
执行带事务的SqlCommand(指定参数值).
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值
///
示例:
///
int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回受影响的行数
</returns>
public
static
int
ExecuteNonQuery(SqlTransaction transaction,
string
spName,
params
object
[] parameterValues)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
return
ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数值
return
ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
ExecuteNonQuery方法结束
#region
ExecuteDataset方法
///
<summary>
///
执行指定数据库连接字符串的命令,返回DataSet.
///
</summary>
///
<remarks>
///
示例:
///
DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(
string
connectionString, CommandType commandType,
string
commandText)
{
return
ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库连接字符串的命令,返回DataSet.
///
</summary>
///
<remarks>
///
示例:
///
DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
SqlParamters参数数组
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(
string
connectionString, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
//
创建并打开数据库连接对象,操作完成释放对象.
using
(SqlConnection connection
=
new
SqlConnection(connectionString))
{
connection.Open();
//
调用指定数据库连接字符串重载方法.
return
ExecuteDataset(connection, commandType, commandText, commandParameters);
}
}
///
<summary>
///
执行指定数据库连接字符串的命令,直接提供参数值,返回DataSet.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值.
///
示例:
///
DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(
string
connectionString,
string
spName,
params
object
[] parameterValues)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中检索存储过程参数
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
//
给存储过程参数分配值
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定数据库连接对象的命令,返回DataSet.
///
</summary>
///
<remarks>
///
示例:
///
DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(SqlConnection connection, CommandType commandType,
string
commandText)
{
return
ExecuteDataset(connection, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库连接对象的命令,指定存储过程参数,返回DataSet.
///
</summary>
///
<remarks>
///
示例:
///
DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<param>
SqlParamter参数数组
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(SqlConnection connection, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
//
预处理
SqlCommand cmd
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(cmd, connection, (SqlTransaction)
null
, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
创建SqlDataAdapter和DataSet.
using
( SqlDataAdapter da
=
new
SqlDataAdapter(cmd) )
{
DataSet ds
=
new
DataSet();
//
填充DataSet.
da.Fill(ds);
cmd.Parameters.Clear();
if
( mustCloseConnection )
connection.Close();
return
ds;
}
}
///
<summary>
///
执行指定数据库连接对象的命令,指定参数值,返回DataSet.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输入参数和返回值.
///
示例.:
///
DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(SqlConnection connection,
string
spName,
params
object
[] parameterValues)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
比缓存中加载存储过程参数
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
给存储过程参数分配值
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
ExecuteDataset(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定事务的命令,返回DataSet.
///
</summary>
///
<remarks>
///
示例:
///
DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType,
string
commandText)
{
return
ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定事务的命令,指定参数,返回DataSet.
///
</summary>
///
<remarks>
///
示例:
///
DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<param>
SqlParamter参数数组
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
//
预处理
SqlCommand cmd
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
创建 DataAdapter & DataSet
using
( SqlDataAdapter da
=
new
SqlDataAdapter(cmd) )
{
DataSet ds
=
new
DataSet();
da.Fill(ds);
cmd.Parameters.Clear();
return
ds;
}
}
///
<summary>
///
执行指定事务的命令,指定参数值,返回DataSet.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输入参数和返回值.
///
示例.:
///
DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);
///
</remarks>
///
<param>
事务
</param>
///
<param>
存储过程名
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回一个包含结果集的DataSet
</returns>
public
static
DataSet ExecuteDataset(SqlTransaction transaction,
string
spName,
params
object
[] parameterValues)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
给存储过程参数分配值
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
ExecuteDataset数据集命令结束
#region
ExecuteReader 数据阅读器
///
<summary>
///
枚举,标识数据库连接是由SqlHelper提供还是由调用者提供
///
</summary>
private
enum
SqlConnectionOwnership
{
///
<summary>
由SqlHelper提供连接
</summary>
Internal,
///
<summary>
由调用者提供连接
</summary>
External
}
///
<summary>
///
执行指定数据库连接对象的数据阅读器.
///
</summary>
///
<remarks>
///
如果是SqlHelper打开连接,当连接关闭DataReader也将关闭.
///
如果是调用都打开连接,DataReader由调用都管理.
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
一个有效的事务,或者为 'null'
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<param>
SqlParameters参数数组,如果没有参数则为'null'
</param>
///
<param>
标识数据库连接对象是由调用者提供还是由SqlHelper提供
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
private
static
SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType,
string
commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
bool
mustCloseConnection
=
false
;
//
创建命令
SqlCommand cmd
=
new
SqlCommand();
try
{
PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
创建数据阅读器
SqlDataReader dataReader;
if
(connectionOwnership
==
SqlConnectionOwnership.External)
{
dataReader
=
cmd.ExecuteReader();
}
else
{
dataReader
=
cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
//
清除参数,以便再次使用..
//
HACK: There is a problem here, the output parameter values are fletched
//
when the reader is closed, so if the parameters are detached from the command
//
then the SqlReader can磘 set its values.
//
When this happen, the parameters can磘 be used again in other command.
bool
canClear
=
true
;
foreach
(SqlParameter commandParameter
in
cmd.Parameters)
{
if
(commandParameter.Direction
!=
ParameterDirection.Input)
canClear
=
false
;
}
if
(canClear)
{
cmd.Parameters.Clear();
}
return
dataReader;
}
catch
{
if
( mustCloseConnection )
connection.Close();
throw
;
}
}
///
<summary>
///
执行指定数据库连接字符串的数据阅读器.
///
</summary>
///
<remarks>
///
示例:
///
SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(
string
connectionString, CommandType commandType,
string
commandText)
{
return
ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库连接字符串的数据阅读器,指定参数.
///
</summary>
///
<remarks>
///
示例:
///
SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<param>
SqlParamter参数数组(new SqlParameter("@prodid", 24))
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(
string
connectionString, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
SqlConnection connection
=
null
;
try
{
connection
=
new
SqlConnection(connectionString);
connection.Open();
return
ExecuteReader(connection,
null
, commandType, commandText, commandParameters,SqlConnectionOwnership.Internal);
}
catch
{
//
If we fail to return the SqlDatReader, we need to close the connection ourselves
if
( connection
!=
null
) connection.Close();
throw
;
}
}
///
<summary>
///
执行指定数据库连接字符串的数据阅读器,指定参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
示例:
///
SqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(
string
connectionString,
string
spName,
params
object
[] parameterValues)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定数据库连接对象的数据阅读器.
///
</summary>
///
<remarks>
///
示例:
///
SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名或T-SQL语句
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType,
string
commandText)
{
return
ExecuteReader(connection, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
[调用者方式]执行指定数据库连接对象的数据阅读器,指定参数.
///
</summary>
///
<remarks>
///
示例:
///
SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
SqlParamter参数数组
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
return
ExecuteReader(connection, (SqlTransaction)
null
, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
///
<summary>
///
[调用者方式]执行指定数据库连接对象的数据阅读器,指定参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
示例:
///
SqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
T存储过程名
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(SqlConnection connection,
string
spName,
params
object
[] parameterValues)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
ExecuteReader(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
[调用者方式]执行指定数据库事务的数据阅读器,指定参数值.
///
</summary>
///
<remarks>
///
示例:
///
SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType,
string
commandText)
{
return
ExecuteReader(transaction, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
[调用者方式]执行指定数据库事务的数据阅读器,指定参数.
///
</summary>
///
<remarks>
///
示例:
///
SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
return
ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
///
<summary>
///
[调用者方式]执行指定数据库事务的数据阅读器,指定参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
SqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
存储过程名称
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReader(SqlTransaction transaction,
string
spName,
params
object
[] parameterValues)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
AssignParameterValues(commandParameters, parameterValues);
return
ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数值
return
ExecuteReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
ExecuteReader数据阅读器
#region
ExecuteScalar 返回结果集中的第一行第一列
///
<summary>
///
执行指定数据库连接字符串的命令,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
示例:
///
int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(
string
connectionString, CommandType commandType,
string
commandText)
{
//
执行参数为空的方法
return
ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库连接字符串的命令,指定参数,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
示例:
///
int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(
string
connectionString, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
//
创建并打开数据库连接对象,操作完成释放对象.
using
(SqlConnection connection
=
new
SqlConnection(connectionString))
{
connection.Open();
//
调用指定数据库连接字符串重载方法.
return
ExecuteScalar(connection, commandType, commandText, commandParameters);
}
}
///
<summary>
///
执行指定数据库连接字符串的命令,指定参数值,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名称
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(
string
connectionString,
string
spName,
params
object
[] parameterValues)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
return
ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数值
return
ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定数据库连接对象的命令,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
示例:
///
int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(SqlConnection connection, CommandType commandType,
string
commandText)
{
//
执行参数为空的方法
return
ExecuteScalar(connection, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库连接对象的命令,指定参数,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
示例:
///
int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(SqlConnection connection, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
//
创建SqlCommand命令,并进行预处理
SqlCommand cmd
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(cmd, connection, (SqlTransaction)
null
, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
执行SqlCommand命令,并返回结果.
object
retval
=
cmd.ExecuteScalar();
//
清除参数,以便再次使用.
cmd.Parameters.Clear();
if
( mustCloseConnection )
connection.Close();
return
retval;
}
///
<summary>
///
执行指定数据库连接对象的命令,指定参数值,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(SqlConnection connection,
string
spName,
params
object
[] parameterValues)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
return
ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数值
return
ExecuteScalar(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定数据库事务的命令,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
示例:
///
int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(SqlTransaction transaction, CommandType commandType,
string
commandText)
{
//
执行参数为空的方法
return
ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库事务的命令,指定参数,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
示例:
///
int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(SqlTransaction transaction, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
//
创建SqlCommand命令,并进行预处理
SqlCommand cmd
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
执行SqlCommand命令,并返回结果.
object
retval
=
cmd.ExecuteScalar();
//
清除参数,以便再次使用.
cmd.Parameters.Clear();
return
retval;
}
///
<summary>
///
执行指定数据库事务的命令,指定参数值,返回结果集中的第一行第一列.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
存储过程名称
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalar(SqlTransaction transaction,
string
spName,
params
object
[] parameterValues)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
PPull the parameters for this stored procedure from the parameter cache ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
return
ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数值
return
ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
ExecuteScalar
#region
ExecuteXmlReader XML阅读器
///
<summary>
///
执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回.
///
</summary>
///
<remarks>
///
示例:
///
XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句 using "FOR XML AUTO"
</param>
///
<returns>
返回XmlReader结果集对象.
</returns>
public
static
XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType,
string
commandText)
{
//
执行参数为空的方法
return
ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数.
///
</summary>
///
<remarks>
///
示例:
///
XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句 using "FOR XML AUTO"
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
///
<returns>
返回XmlReader结果集对象.
</returns>
public
static
XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
bool
mustCloseConnection
=
false
;
//
创建SqlCommand命令,并进行预处理
SqlCommand cmd
=
new
SqlCommand();
try
{
PrepareCommand(cmd, connection, (SqlTransaction)
null
, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
执行命令
XmlReader retval
=
cmd.ExecuteXmlReader();
//
清除参数,以便再次使用.
cmd.Parameters.Clear();
return
retval;
}
catch
{
if
( mustCloseConnection )
connection.Close();
throw
;
}
}
///
<summary>
///
执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称 using "FOR XML AUTO"
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回XmlReader结果集对象.
</returns>
public
static
XmlReader ExecuteXmlReader(SqlConnection connection,
string
spName,
params
object
[] parameterValues)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
return
ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数值
return
ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回.
///
</summary>
///
<remarks>
///
示例:
///
XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders");
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句 using "FOR XML AUTO"
</param>
///
<returns>
返回XmlReader结果集对象.
</returns>
public
static
XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType,
string
commandText)
{
//
执行参数为空的方法
return
ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])
null
);
}
///
<summary>
///
执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数.
///
</summary>
///
<remarks>
///
示例:
///
XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句 using "FOR XML AUTO"
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
///
<returns>
返回XmlReader结果集对象.
</returns>
public
static
XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
//
创建SqlCommand命令,并进行预处理
SqlCommand cmd
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
执行命令
XmlReader retval
=
cmd.ExecuteXmlReader();
//
清除参数,以便再次使用.
cmd.Parameters.Clear();
return
retval;
}
///
<summary>
///
执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
XmlReader r = ExecuteXmlReader(trans, "GetOrders", 24, 36);
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
存储过程名称
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
///
<returns>
返回一个包含结果集的DataSet.
</returns>
public
static
XmlReader ExecuteXmlReader(SqlTransaction transaction,
string
spName,
params
object
[] parameterValues)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
return
ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
//
没有参数值
return
ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
ExecuteXmlReader 阅读器结束
#region
FillDataset 填充数据集
///
<summary>
///
执行指定数据库连接字符串的命令,映射数据表并填充数据集.
///
</summary>
///
<remarks>
///
示例:
///
FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
</param>
public
static
void
FillDataset(
string
connectionString, CommandType commandType,
string
commandText, DataSet dataSet,
string
[] tableNames)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( dataSet
==
null
)
throw
new
ArgumentNullException(
"
dataSet
"
);
//
创建并打开数据库连接对象,操作完成释放对象.
using
(SqlConnection connection
=
new
SqlConnection(connectionString))
{
connection.Open();
//
调用指定数据库连接字符串重载方法.
FillDataset(connection, commandType, commandText, dataSet, tableNames);
}
}
///
<summary>
///
执行指定数据库连接字符串的命令,映射数据表并填充数据集.指定命令参数.
///
</summary>
///
<remarks>
///
示例:
///
FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
public
static
void
FillDataset(
string
connectionString, CommandType commandType,
string
commandText, DataSet dataSet,
string
[] tableNames,
params
SqlParameter[] commandParameters)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( dataSet
==
null
)
throw
new
ArgumentNullException(
"
dataSet
"
);
//
创建并打开数据库连接对象,操作完成释放对象.
using
(SqlConnection connection
=
new
SqlConnection(connectionString))
{
connection.Open();
//
调用指定数据库连接字符串重载方法.
FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters);
}
}
///
<summary>
///
执行指定数据库连接字符串的命令,映射数据表并填充数据集,指定存储过程参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, 24);
///
</remarks>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名称
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
public
static
void
FillDataset(
string
connectionString,
string
spName,
DataSet dataSet,
string
[] tableNames,
params
object
[] parameterValues)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( dataSet
==
null
)
throw
new
ArgumentNullException(
"
dataSet
"
);
//
创建并打开数据库连接对象,操作完成释放对象.
using
(SqlConnection connection
=
new
SqlConnection(connectionString))
{
connection.Open();
//
调用指定数据库连接字符串重载方法.
FillDataset (connection, spName, dataSet, tableNames, parameterValues);
}
}
///
<summary>
///
执行指定数据库连接对象的命令,映射数据表并填充数据集.
///
</summary>
///
<remarks>
///
示例:
///
FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
public
static
void
FillDataset(SqlConnection connection, CommandType commandType,
string
commandText, DataSet dataSet,
string
[] tableNames)
{
FillDataset(connection, commandType, commandText, dataSet, tableNames,
null
);
}
///
<summary>
///
执行指定数据库连接对象的命令,映射数据表并填充数据集,指定参数.
///
</summary>
///
<remarks>
///
示例:
///
FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
public
static
void
FillDataset(SqlConnection connection, CommandType commandType,
string
commandText, DataSet dataSet,
string
[] tableNames,
params
SqlParameter[] commandParameters)
{
FillDataset(connection,
null
, commandType, commandText, dataSet, tableNames, commandParameters);
}
///
<summary>
///
执行指定数据库连接对象的命令,映射数据表并填充数据集,指定存储过程参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
FillDataset(conn, "GetOrders", ds, new string[] {"orders"}, 24, 36);
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
public
static
void
FillDataset(SqlConnection connection,
string
spName,
DataSet dataSet,
string
[] tableNames,
params
object
[] parameterValues)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
(dataSet
==
null
)
throw
new
ArgumentNullException(
"
dataSet
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
}
else
{
//
没有参数值
FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames);
}
}
///
<summary>
///
执行指定数据库事务的命令,映射数据表并填充数据集.
///
</summary>
///
<remarks>
///
示例:
///
FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
public
static
void
FillDataset(SqlTransaction transaction, CommandType commandType,
string
commandText,
DataSet dataSet,
string
[] tableNames)
{
FillDataset (transaction, commandType, commandText, dataSet, tableNames,
null
);
}
///
<summary>
///
执行指定数据库事务的命令,映射数据表并填充数据集,指定参数.
///
</summary>
///
<remarks>
///
示例:
///
FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
public
static
void
FillDataset(SqlTransaction transaction, CommandType commandType,
string
commandText, DataSet dataSet,
string
[] tableNames,
params
SqlParameter[] commandParameters)
{
FillDataset(transaction.Connection, transaction, commandType, commandText, dataSet, tableNames, commandParameters);
}
///
<summary>
///
执行指定数据库事务的命令,映射数据表并填充数据集,指定存储过程参数值.
///
</summary>
///
<remarks>
///
此方法不提供访问存储过程输出参数和返回值参数.
///
///
示例:
///
FillDataset(trans, "GetOrders", ds, new string[]{"orders"}, 24, 36);
///
</remarks>
///
<param>
一个有效的连接事务
</param>
///
<param>
存储过程名称
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
///
<param>
分配给存储过程输入参数的对象数组
</param>
public
static
void
FillDataset(SqlTransaction transaction,
string
spName,
DataSet dataSet,
string
[] tableNames,
params
object
[] parameterValues)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( dataSet
==
null
)
throw
new
ArgumentNullException(
"
dataSet
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果有参数值
if
((parameterValues
!=
null
)
&&
(parameterValues.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
给存储过程参数赋值
AssignParameterValues(commandParameters, parameterValues);
//
调用重载方法
FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
}
else
{
//
没有参数值
FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames);
}
}
///
<summary>
///
[私有方法][内部调用]执行指定数据库连接对象/事务的命令,映射数据表并填充数据集,DataSet/TableNames/SqlParameters.
///
</summary>
///
<remarks>
///
示例:
///
FillDataset(conn, trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
一个有效的连接事务
</param>
///
<param>
命令类型 (存储过程,命令文本或其它)
</param>
///
<param>
存储过程名称或T-SQL语句
</param>
///
<param>
要填充结果集的DataSet实例
</param>
///
<param>
表映射的数据表数组
///
用户定义的表名 (可有是实际的表名.)
///
</param>
///
<param>
分配给命令的SqlParamter参数数组
</param>
private
static
void
FillDataset(SqlConnection connection, SqlTransaction transaction, CommandType commandType,
string
commandText, DataSet dataSet,
string
[] tableNames,
params
SqlParameter[] commandParameters)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( dataSet
==
null
)
throw
new
ArgumentNullException(
"
dataSet
"
);
//
创建SqlCommand命令,并进行预处理
SqlCommand command
=
new
SqlCommand();
bool
mustCloseConnection
=
false
;
PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters,
out
mustCloseConnection );
//
执行命令
using
( SqlDataAdapter dataAdapter
=
new
SqlDataAdapter(command) )
{
//
追加表映射
if
(tableNames
!=
null
&&
tableNames.Length
>
0
)
{
string
tableName
=
"
Table
"
;
for
(
int
index
=
0
; index
<
tableNames.Length; index
++
)
{
if
( tableNames[index]
==
null
||
tableNames[index].Length
==
0
)
throw
new
ArgumentException(
"
The tableNames parameter must contain a list of tables, a value was provided as null or empty string.
"
,
"
tableNames
"
);
dataAdapter.TableMappings.Add(tableName, tableNames[index]);
tableName
+=
(index
+
1
).ToString();
}
}
//
填充数据集使用默认表名称
dataAdapter.Fill(dataSet);
//
清除参数,以便再次使用.
command.Parameters.Clear();
}
if
( mustCloseConnection )
connection.Close();
}
#endregion
#region
UpdateDataset 更新数据集
///
<summary>
///
执行数据集更新到数据库,指定inserted, updated, or deleted命令.
///
</summary>
///
<remarks>
///
示例:
///
UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
///
</remarks>
///
<param>
[追加记录]一个有效的T-SQL语句或存储过程
</param>
///
<param>
[删除记录]一个有效的T-SQL语句或存储过程
</param>
///
<param>
[更新记录]一个有效的T-SQL语句或存储过程
</param>
///
<param>
要更新到数据库的DataSet
</param>
///
<param>
要更新到数据库的DataTable
</param>
public
static
void
UpdateDataset(SqlCommand insertCommand, SqlCommand deleteCommand, SqlCommand updateCommand, DataSet dataSet,
string
tableName)
{
if
( insertCommand
==
null
)
throw
new
ArgumentNullException(
"
insertCommand
"
);
if
( deleteCommand
==
null
)
throw
new
ArgumentNullException(
"
deleteCommand
"
);
if
( updateCommand
==
null
)
throw
new
ArgumentNullException(
"
updateCommand
"
);
if
( tableName
==
null
||
tableName.Length
==
0
)
throw
new
ArgumentNullException(
"
tableName
"
);
//
创建SqlDataAdapter,当操作完成后释放.
using
(SqlDataAdapter dataAdapter
=
new
SqlDataAdapter())
{
//
设置数据适配器命令
dataAdapter.UpdateCommand
=
updateCommand;
dataAdapter.InsertCommand
=
insertCommand;
dataAdapter.DeleteCommand
=
deleteCommand;
//
更新数据集改变到数据库
dataAdapter.Update (dataSet, tableName);
//
提交所有改变到数据集.
dataSet.AcceptChanges();
}
}
#endregion
#region
CreateCommand 创建一条SqlCommand命令
///
<summary>
///
创建SqlCommand命令,指定数据库连接对象,存储过程名和参数.
///
</summary>
///
<remarks>
///
示例:
///
SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
源表的列名称数组
</param>
///
<returns>
返回SqlCommand命令
</returns>
public
static
SqlCommand CreateCommand(SqlConnection connection,
string
spName,
params
string
[] sourceColumns)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
创建命令
SqlCommand cmd
=
new
SqlCommand( spName, connection );
cmd.CommandType
=
CommandType.StoredProcedure;
//
如果有参数值
if
((sourceColumns
!=
null
)
&&
(sourceColumns.Length
>
0
))
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
将源表的列到映射到DataSet命令中.
for
(
int
index
=
0
; index
<
sourceColumns.Length; index
++
)
commandParameters[index].SourceColumn
=
sourceColumns[index];
//
Attach the discovered parameters to the SqlCommand object
AttachParameters (cmd, commandParameters);
}
return
cmd;
}
#endregion
#region
ExecuteNonQueryTypedParams 类型化参数(DataRow)
///
<summary>
///
执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回受影响的行数.
///
</summary>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回影响的行数
</returns>
public
static
int
ExecuteNonQueryTypedParams(String connectionString, String spName, DataRow dataRow)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
(dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回受影响的行数.
///
</summary>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回影响的行数
</returns>
public
static
int
ExecuteNonQueryTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
(dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库事物的存储过程,使用DataRow做为参数值,返回受影响的行数.
///
</summary>
///
<param>
一个有效的连接事务 object
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回影响的行数
</returns>
public
static
int
ExecuteNonQueryTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
Sf the row has values, the store procedure parameters must be initialized
if
(dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region
ExecuteDatasetTypedParams 类型化参数(DataRow)
///
<summary>
///
执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回DataSet.
///
</summary>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回一个包含结果集的DataSet.
</returns>
public
static
DataSet ExecuteDatasetTypedParams(
string
connectionString, String spName, DataRow dataRow)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回DataSet.
///
</summary>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回一个包含结果集的DataSet.
</returns>
///
public
static
DataSet ExecuteDatasetTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回DataSet.
///
</summary>
///
<param>
一个有效的连接事务 object
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回一个包含结果集的DataSet.
</returns>
public
static
DataSet ExecuteDatasetTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region
ExecuteReaderTypedParams 类型化参数(DataRow)
///
<summary>
///
执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回DataReader.
///
</summary>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReaderTypedParams(String connectionString, String spName, DataRow dataRow)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回DataReader.
///
</summary>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库事物的存储过程,使用DataRow做为参数值,返回DataReader.
///
</summary>
///
<param>
一个有效的连接事务 object
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回包含结果集的SqlDataReader
</returns>
public
static
SqlDataReader ExecuteReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region
ExecuteScalarTypedParams 类型化参数(DataRow)
///
<summary>
///
执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列.
///
</summary>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalarTypedParams(String connectionString, String spName, DataRow dataRow)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列.
///
</summary>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalarTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列.
///
</summary>
///
<param>
一个有效的连接事务 object
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回结果集中的第一行第一列
</returns>
public
static
object
ExecuteScalarTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region
ExecuteXmlReaderTypedParams 类型化参数(DataRow)
///
<summary>
///
执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回XmlReader类型的结果集.
///
</summary>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回XmlReader结果集对象.
</returns>
public
static
XmlReader ExecuteXmlReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
}
}
///
<summary>
///
执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回XmlReader类型的结果集.
///
</summary>
///
<param>
一个有效的连接事务 object
</param>
///
<param>
存储过程名称
</param>
///
<param>
使用DataRow作为参数值
</param>
///
<returns>
返回XmlReader结果集对象.
</returns>
public
static
XmlReader ExecuteXmlReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if
( transaction
==
null
)
throw
new
ArgumentNullException(
"
transaction
"
);
if
( transaction
!=
null
&&
transaction.Connection
==
null
)
throw
new
ArgumentException(
"
The transaction was rollbacked or commited, please provide an open transaction.
"
,
"
transaction
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
//
如果row有值,存储过程必须初始化.
if
( dataRow
!=
null
&&
dataRow.ItemArray.Length
>
0
)
{
//
从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
SqlParameter[] commandParameters
=
SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
//
分配参数值
AssignParameterValues(commandParameters, dataRow);
return
SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return
SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
}
///
<summary>
///
SqlHelperParameterCache提供缓存存储过程参数,并能够在运行时从存储过程中探索参数.
///
</summary>
public
sealed
class
SqlHelperParameterCache
{
#region
私有方法,字段,构造函数
//
私有构造函数,妨止类被实例化.
private
SqlHelperParameterCache() {}
//
这个方法要注意
private
static
Hashtable paramCache
=
Hashtable.Synchronized(
new
Hashtable());
///
<summary>
///
探索运行时的存储过程,返回SqlParameter参数数组.
///
初始化参数值为 DBNull.Value.
///
</summary>
///
<param>
一个有效的数据库连接
</param>
///
<param>
存储过程名称
</param>
///
<param>
是否包含返回值参数
</param>
///
<returns>
返回SqlParameter参数数组
</returns>
private
static
SqlParameter[] DiscoverSpParameterSet(SqlConnection connection,
string
spName,
bool
includeReturnValueParameter)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
SqlCommand cmd
=
new
SqlCommand(spName, connection);
cmd.CommandType
=
CommandType.StoredProcedure;
connection.Open();
//
检索cmd指定的存储过程的参数信息,并填充到cmd的Parameters参数集中.
SqlCommandBuilder.DeriveParameters(cmd);
connection.Close();
//
如果不包含返回值参数,将参数集中的每一个参数删除.
if
(
!
includeReturnValueParameter)
{
cmd.Parameters.RemoveAt(
0
);
}
//
创建参数数组
SqlParameter[] discoveredParameters
=
new
SqlParameter[cmd.Parameters.Count];
//
将cmd的Parameters参数集复制到discoveredParameters数组.
cmd.Parameters.CopyTo(discoveredParameters,
0
);
//
初始化参数值为 DBNull.Value.
foreach
(SqlParameter discoveredParameter
in
discoveredParameters)
{
discoveredParameter.Value
=
DBNull.Value;
}
return
discoveredParameters;
}
///
<summary>
///
SqlParameter参数数组的深层拷贝.
///
</summary>
///
<param>
原始参数数组
</param>
///
<returns>
返回一个同样的参数数组
</returns>
private
static
SqlParameter[] CloneParameters(SqlParameter[] originalParameters)
{
SqlParameter[] clonedParameters
=
new
SqlParameter[originalParameters.Length];
for
(
int
i
=
0
, j
=
originalParameters.Length; i
<
j; i
++
)
{
clonedParameters[i]
=
(SqlParameter)((ICloneable)originalParameters[i]).Clone();
}
return
clonedParameters;
}
#endregion
私有方法,字段,构造函数结束
#region
缓存方法
///
<summary>
///
追加参数数组到缓存.
///
</summary>
///
<param>
一个有效的数据库连接字符串
</param>
///
<param>
存储过程名或SQL语句
</param>
///
<param>
要缓存的参数数组
</param>
public
static
void
CacheParameterSet(
string
connectionString,
string
commandText,
params
SqlParameter[] commandParameters)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( commandText
==
null
||
commandText.Length
==
0
)
throw
new
ArgumentNullException(
"
commandText
"
);
string
hashKey
=
connectionString
+
"
:
"
+
commandText;
paramCache[hashKey]
=
commandParameters;
}
///
<summary>
///
从缓存中获取参数数组.
///
</summary>
///
<param>
一个有效的数据库连接字符
</param>
///
<param>
存储过程名或SQL语句
</param>
///
<returns>
参数数组
</returns>
public
static
SqlParameter[] GetCachedParameterSet(
string
connectionString,
string
commandText)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( commandText
==
null
||
commandText.Length
==
0
)
throw
new
ArgumentNullException(
"
commandText
"
);
string
hashKey
=
connectionString
+
"
:
"
+
commandText;
SqlParameter[] cachedParameters
=
paramCache[hashKey]
as
SqlParameter[];
if
(cachedParameters
==
null
)
{
return
null
;
}
else
{
return
CloneParameters(cachedParameters);
}
}
#endregion
缓存方法结束
#region
检索指定的存储过程的参数集
///
<summary>
///
返回指定的存储过程的参数集
///
</summary>
///
<remarks>
///
这个方法将查询数据库,并将信息存储到缓存.
///
</remarks>
///
<param>
一个有效的数据库连接字符
</param>
///
<param>
存储过程名
</param>
///
<returns>
返回SqlParameter参数数组
</returns>
public
static
SqlParameter[] GetSpParameterSet(
string
connectionString,
string
spName)
{
return
GetSpParameterSet(connectionString, spName,
false
);
}
///
<summary>
///
返回指定的存储过程的参数集
///
</summary>
///
<remarks>
///
这个方法将查询数据库,并将信息存储到缓存.
///
</remarks>
///
<param>
一个有效的数据库连接字符.
</param>
///
<param>
存储过程名
</param>
///
<param>
是否包含返回值参数
</param>
///
<returns>
返回SqlParameter参数数组
</returns>
public
static
SqlParameter[] GetSpParameterSet(
string
connectionString,
string
spName,
bool
includeReturnValueParameter)
{
if
( connectionString
==
null
||
connectionString.Length
==
0
)
throw
new
ArgumentNullException(
"
connectionString
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
using
(SqlConnection connection
=
new
SqlConnection(connectionString))
{
return
GetSpParameterSetInternal(connection, spName, includeReturnValueParameter);
}
}
///
<summary>
///
[内部]返回指定的存储过程的参数集(使用连接对象).
///
</summary>
///
<remarks>
///
这个方法将查询数据库,并将信息存储到缓存.
///
</remarks>
///
<param>
一个有效的数据库连接字符
</param>
///
<param>
存储过程名
</param>
///
<returns>
返回SqlParameter参数数组
</returns>
internal
static
SqlParameter[] GetSpParameterSet(SqlConnection connection,
string
spName)
{
return
GetSpParameterSet(connection, spName,
false
);
}
///
<summary>
///
[内部]返回指定的存储过程的参数集(使用连接对象)
///
</summary>
///
<remarks>
///
这个方法将查询数据库,并将信息存储到缓存.
///
</remarks>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名
</param>
///
<param>
///
是否包含返回值参数
///
</param>
///
<returns>
返回SqlParameter参数数组
</returns>
internal
static
SqlParameter[] GetSpParameterSet(SqlConnection connection,
string
spName,
bool
includeReturnValueParameter)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
using
(SqlConnection clonedConnection
=
(SqlConnection)((ICloneable)connection).Clone())
{
return
GetSpParameterSetInternal(clonedConnection, spName, includeReturnValueParameter);
}
}
///
<summary>
///
[私有]返回指定的存储过程的参数集(使用连接对象)
///
</summary>
///
<param>
一个有效的数据库连接对象
</param>
///
<param>
存储过程名
</param>
///
<param>
是否包含返回值参数
</param>
///
<returns>
返回SqlParameter参数数组
</returns>
private
static
SqlParameter[] GetSpParameterSetInternal(SqlConnection connection,
string
spName,
bool
includeReturnValueParameter)
{
if
( connection
==
null
)
throw
new
ArgumentNullException(
"
connection
"
);
if
( spName
==
null
||
spName.Length
==
0
)
throw
new
ArgumentNullException(
"
spName
"
);
string
hashKey
=
connection.ConnectionString
+
"
:
"
+
spName
+
(includeReturnValueParameter
?
"
:include ReturnValue Parameter
"
:
""
);
SqlParameter[] cachedParameters;
cachedParameters
=
paramCache[hashKey]
as
SqlParameter[];
if
(cachedParameters
==
null
)
{
SqlParameter[] spParameters
=
DiscoverSpParameterSet(connection, spName, includeReturnValueParameter);
paramCache[hashKey]
=
spParameters;
cachedParameters
=
spParameters;
}
return
CloneParameters(cachedParameters);
}
#endregion
参数集检索结束
}
}