Silverlight通过Webservice连接数据库操作
QuestionsDbSLModel：SL类库项目，提供实体层，对应数据库表。
三：WS函数
/// 模拟数据库表
/// PS：一张表的字段不外乎几个基本数据类型，查询出来的值，在这里进行赋值
/// 本类的一个实例，相当于是一条记录，本类的一个实例数组，就相当于是datatable
/// 在UI端，你可将本类的实例数组转换为数据源
///
public class BaseVars
{
public BaseVars()
{
ListString = new List
ListInt = new List
ListBool = new List
ListByte = new List
ListFloat = new List
ListDouble = new List
}
public List
public List
public List
public List
public List
public List
}
/// 通用查询方法
/// 1：查询返回的记录，将会生成实例BaseVars；
/// 2：本方法返回BaseVars的列表；
/// 3：在调用方，要重新对数据进行组织，以便进行展示；
///
///
///
///
[WebMethod]
public List
{
List
using (DataSet ds = SqlHelper.ExecuteDataSet(sql, commandParams))
{
if (ds == null || ds.Tables[0].Rows.Count < 0)
{
return null;
}
lr = ListBaseDataSet.DataSetToListBaseVars(ds, 0);
}
return lr;
}
void wss_GetListBaseVarsCompleted(object sender, QuestionsDbSLServices.ServiceReferenceYi.GetListBaseVarsCompletedEventArgs e)
{
ServiceReferenceYi.BaseVars[] lr = e.Result;
foreach (var item in lr)
{
QuestionsDbSLModel.Res_Source ds = new QuestionsDbSLModel.Res_Source();
ds.SourceId = item.ListInt[0];
ds.SourceName = item.ListString[0];
ds.DispOrder = item.ListInt[1];
ldResource.Add(ds);
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
using System.Xml;
using System.Diagnostics;
namespace QuestionsDbSL.Web.ClientBin
{
[DebuggerStepThrough]
public sealed class SqlHelper
{
#region private utility methods & constructors
//Since this class provides only static methods, make the default constructor private to prevent
//instances from being created with "new SqlHelper()".
private SqlHelper() { }
///
/// This method is used to attach array of SqlParameters to a SqlCommand.
/// This method will assign a value of DbNull to any parameter with a direction of
/// InputOutput and a value of null.
/// This behavior will prevent default values from being used, but
/// this will be the less common case than an intended pure output parameter (derived as InputOutput)
/// where the user provided no input value.
///
/// The command to which the parameters will be added
/// an array of SqlParameters tho be added to command
private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters)
{
foreach (SqlParameter p in commandParameters)
{
//check for derived output value with no value assigned
if ((p.Direction == ParameterDirection.InputOutput) && (p.Value == null))
{
p.Value = DBNull.Value;
}
command.Parameters.Add(p);
}
}
///
/// This method assigns an array of values to an array of SqlParameters.
///
/// array of SqlParameters to be assigned values
/// array of Components holding the values to be assigned
private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues)
{
if ((commandParameters == null) || (parameterValues == null))
{
//do nothing if we get no data
return;
}
// we must have the same number of values as we pave parameters to put them in
if (commandParameters.Length != parameterValues.Length)
{
throw new ArgumentException("Parameter count does not match Parameter Value count.");
}
//iterate through the SqlParameters, assigning the values from the corresponding position in the
//value array
for (int i = 0, j = commandParameters.Length; i < j; i++)
{
commandParameters[i].Value = parameterValues[i];
}
}
///
/// This method opens (if necessary) and assigns a connection, transaction, command type and parameters
/// to the provided command.
///
/// the SqlCommand to be prepared
/// a valid SqlConnection, on which to execute this command
/// a valid SqlTransaction, or 'null'
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParameters to be associated with the command or 'null' if no parameters are required
private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters)
{
//if the provided connection is not open, we will open it
if (connection.State != ConnectionState.Open)
connection.Open();
//associate the connection with the command
command.Connection = connection;
command.CommandTimeout = 180;
//set the command text (stored procedure name or SQL statement)
command.CommandText = commandText;
//if we were provided a transaction, assign it.
if (transaction != null)
command.Transaction = transaction;
//set the command type
command.CommandType = commandType;
//attach the command parameters if they are provided
if (commandParameters != null)
AttachParameters(command, commandParameters);
return;
}
#endregion private utility methods & constructors
#region DataHelpers
public static string CheckNull(object obj)
{
return (string)obj;
}
public static string CheckNull(DBNull obj)
{
return null;
}
#endregion
#region AddParameters
public static object CheckForNullString(string text)
{
if (text == null || text.Trim().Length == 0)
{
return DBNull.Value;
}
else
{
return text;
}
}
public static SqlParameter MakeInParam(string ParamName, object Value)
{
return new SqlParameter(ParamName, Value);
}
///
/// Make input param.
///
/// Name of param.
/// Param type.
/// Param size.
/// Param value.
///
public static SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
}
///
/// Make input param.
///
/// Name of param.
/// Param type.
/// Param size.
///
public static SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null);
}
///
/// Make stored procedure param.
///
/// Name of param.
/// Param type.
/// Param size.
/// Parm direction.
/// Param value.
///
public static SqlParameter MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value)
{
SqlParameter param;
if (Size > 0)
param = new SqlParameter(ParamName, DbType, Size);
else
param = new SqlParameter(ParamName, DbType);
param.Direction = Direction;
if (!(Direction == ParameterDirection.Output && Value == null))
param.Value = Value;
return param;
}
#endregion
#region ExecuteNonQuery
///
/// 执行一个简单的Sqlcommand 没有返回结果
///
/// 例如:
/// int result = ExecuteNonQuery("delete from test where 1>2 "); 返回 result =0
/// 只能是sql语句
///
public static int ExecuteNonQuery(string commandText)
{
return ExecuteNonQuery(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// 执行一个简单的Sqlcommand 没有返回结果
///
/// 例如:
/// int result = ExecuteNonQuery("delete from test where tt =@tt", new SqlParameter("@tt", 24));
/// 只能是sql语句
/// 参数
///
public static int ExecuteNonQuery(string commandText, params SqlParameter[] commandParameters)
{
int i = 0;
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
return ExecuteNonQuery(cn, CommandType.Text, commandText, commandParameters);
}
}
///
/// Execute a SqlCommand (that returns no resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static int ExecuteNonQuery(string connectionString, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteNonQuery(connectionString, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns no resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns no resultset) against the database specified in the connection string
/// using the provided parameters.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create & open a SqlConnection, and dispose of it after we are done.
using (SqlConnection cn = new SqlConnection(connectionString))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteNonQuery(cn, commandType, commandText, commandParameters);
}
}
///
/// Execute a SqlCommand (that returns no resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
///
/// a valid SqlConnection
/// the stored procedure name or T-SQL command
///
public static int ExecuteNonQuery(SqlConnection connection, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteNonQuery(connection, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns no resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns no resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static int ExecuteNonQuery(SqlConnection connection, string commandText, params SqlParameter[] commandParameters)
{
return ExecuteNonQuery(connection, CommandType.Text, commandText, commandParameters);
}
///
/// Execute a SqlCommand (that returns no resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters);
//finally, execute the command.
int retval = cmd.ExecuteNonQuery();
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
if (connection.State == ConnectionState.Open)
connection.Close();
return retval;
}
///
/// 执行一个简单的Sqlcommand 没有返回结果
///
/// 例如:
/// int result = ExecuteNonQuery(myTran,"delete from test where 1>2 "); 返回 result =0
/// 事务名称
/// 只能是sql语句
///
public static int ExecuteNonQuery(SqlTransaction transaction, string commandText)
{
return ExecuteNonQuery(transaction, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns no resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null);
}
///
/// 带参数和参数的查询
///
///
///
///
///
public static int ExecuteNonQuery(SqlTransaction transaction, string commandText, params SqlParameter[] commandParameters)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteNonQuery(transaction, CommandType.Text, commandText, commandParameters);
}
///
/// Execute a SqlCommand (that returns no resultset) against the specified SqlTransaction
/// using the provided parameters.
///
///
/// e.g.:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null)
{
//create & open a SqlConnection, and dispose of it after we are done.
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteNonQuery(cn, commandType, commandText, commandParameters);
}
}
else
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
//finally, execute the command.
int retval = cmd.ExecuteNonQuery();
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
return retval;
}
}
#endregion ExecuteNonQuery
#region 执行SqlDataAdapter
public static SqlDataAdapter ExecuteSqlDataAdapter(string commandText)
{
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
return ExecuteSqlDataAdapter(cn, commandText);
}
}
public static SqlDataAdapter ExecuteSqlDataAdapter(SqlConnection connection, string commandText)
{
SqlDataAdapter myda = new SqlDataAdapter(commandText, connection);
myda.SelectCommand.CommandTimeout = 180;
connection.Close();
return myda;
}
#endregion
#region ExecuteDataSet
///
/// 返回datataset 只需要传入查询语句
///
///
///
public static DataSet ExecuteDataSet(string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// 带参数查询
///
///
///
///
public static DataSet ExecuteDataSet(string commandText, params SqlParameter[] commandParameters)
{
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
return ExecuteDataSet(cn, CommandType.Text, commandText, commandParameters);
}
}
///
/// 执行存储过程 返回相应的dataset
///
/// 存储过程名字
///
///
///
public static DataSet ExecuteDataSet(string commandText, CommandType commandType, params SqlParameter[] commandParameters)
{
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
return ExecuteDataSet(cn, commandType, commandText, commandParameters);
}
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataSet ExecuteDataSet(string connectionString, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(connectionString, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataSet ExecuteDataSet(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(connectionString, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string
/// using the provided parameters.
///
///
/// e.g.:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static DataSet ExecuteDataSet(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create & open a SqlConnection, and dispose of it after we are done.
try
{
using (SqlConnection cn = new SqlConnection(connectionString))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteDataSet(cn, commandType, commandText, commandParameters);
}
}
catch (Exception e)
{
throw e;
}
}
///
/// 返回datataset 只需要传入查询语句
///
///
///
public static DataSet ExecuteDataSet(SqlConnection connection, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(connection, CommandType.Text, commandText);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataSet ExecuteDataSet(SqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(connection, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static DataSet ExecuteDataSet(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters);
//create the DataAdapter & DataSet
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
//fill the DataSet using default values for DataTable names, etc.
da.Fill(ds);
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
if (connection.State == ConnectionState.Open)
connection.Close();
//return the dataset
return ds;
}
///
/// s事务中执行返回dataset
///
///
///
///
public static DataSet ExecuteDataSet(SqlTransaction transaction, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(transaction, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataSet ExecuteDataSet(SqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(transaction, commandType, commandText, (SqlParameter[])null);
}
///
/// 事务中返回dataset 可带参数
///
///
///
///
///
public static DataSet ExecuteDataSet(SqlTransaction transaction, string commandText, params SqlParameter[] commandParameters)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataSet(transaction, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction
/// using the provided parameters.
///
///
/// e.g.:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static DataSet ExecuteDataSet(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null)
{
//create & open a SqlConnection, and dispose of it after we are done.
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteDataSet(cn, commandType, commandText, commandParameters);
}
}
else
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
//create the DataAdapter & DataSet
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
//fill the DataSet using default values for DataTable names, etc.
da.Fill(ds);
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
//return the dataset
return ds;
}
}
#endregion ExecuteDataSet
#region ExecuteDataTable
///
/// 连接数据库
///
///
///
public static DataTable ExecuteDataTable(string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataTable(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// 连接数据库
///
///
///
public static DataTable ExecuteDataTable(string commandText, params SqlParameter[] commandParameters)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataTable(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, commandParameters);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// DataTable dt = ExecuteDataTable(connString, CommandType.StoredProcedure, "GetOrders");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataTable(connectionString, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string
/// using the provided parameters.
///
///
/// e.g.:
/// DataTable dt = ExecuteDataTable(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create & open a SqlConnection, and dispose of it after we are done.
using (SqlConnection cn = new SqlConnection(connectionString))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteDataTable(cn, commandType, commandText, commandParameters);
}
}
///
/// 连接数据库
///
///
///
public static DataTable ExecuteDataTable(SqlConnection connection, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataTable(connection, CommandType.Text, commandText);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// DataTable dt = ExecuteDataTable(conn, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataTable(connection, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// DataTable dt = ExecuteDataTable(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters);
//create the DataAdapter & DataTable
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
//fill the DataTable using default values for DataTable names, etc.
da.Fill(dt);
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
if (connection.State == ConnectionState.Open)
connection.Close();
//return the DataTable
return dt;
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// DataTable dt = ExecuteDataTable(trans, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataTable ExecuteDataTable(SqlTransaction transaction, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataTable(transaction, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// DataTable dt = ExecuteDataTable(trans, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static DataTable ExecuteDataTable(SqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteDataTable(transaction, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction
/// using the provided parameters.
///
///
/// e.g.:
/// DataTable dt = ExecuteDataTable(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static DataTable ExecuteDataTable(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null)
{
//create & open a SqlConnection, and dispose of it after we are done.
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteDataTable(cn, commandType, commandText, commandParameters);
}
}
else
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
//create the DataAdapter & DataTable
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
//fill the DataTable using default values for DataTable names, etc.
da.Fill(dt);
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
//return the DataTable
return dt;
}
}
#endregion ExecuteDataTable
#region ExecuteReader
///
/// this enum is used to indicate whether the connection was provided by the caller, or created by SqlHelper, so that
/// we can set the appropriate CommandBehavior when calling ExecuteReader()
///
private enum SqlConnectionOwnership
{
///
Internal,
///
External
}
///
/// 返回SqlDataReader 只是传入一条sql语句
///
/// sql语句
///
public static SqlDataReader ExecuteReader(string commandText)
{
return ExecuteReader(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// 返回SqlDataReader 只是传入一条sql语句和相应的参数
///
///
///
///
public static SqlDataReader ExecuteReader(string commandText, params SqlParameter[] commandParameters)
{
return ExecuteReader(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, commandParameters);
}
///
/// 返回SqlDataReader 只是传入一条sql语句和相应的参数
///
///
///
///
public static SqlDataReader ExecuteReader(string commandText, CommandType commandType, params SqlParameter[] commandParameters)
{
return ExecuteReader(ConfigurationManager.AppSettings["ConnString"], commandType, commandText, commandParameters);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static SqlDataReader ExecuteReader(string connectionString, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteReader(connectionString, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string
/// using the provided parameters.
///
///
/// e.g.:
/// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create & open a SqlConnection
SqlConnection cn = new SqlConnection(connectionString);
cn.Open();
try
{
//call the private overload that takes an internally owned connection in place of the connection string
return ExecuteReader(cn, null, commandType, commandText, commandParameters, SqlConnectionOwnership.Internal);
}
catch
{
//if we fail to return the SqlDatReader, we need to close the connection ourselves
cn.Close();
throw;
}
}
///
/// 返回SqlDataReader 只是传入一条sql语句
///
/// sql语句
///
public static SqlDataReader ExecuteReader(SqlConnection connection, string commandText)
{
return ExecuteReader(connection, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//pass through the call to the private overload using a null transaction value and an externally owned connection
return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
///
/// Create and prepare a SqlCommand, and call ExecuteReader with the appropriate CommandBehavior.
///
///
/// If we created and opened the connection, we want the connection to be closed when the DataReader is closed.
///
/// If the caller provided the connection, we want to leave it to them to manage.
///
/// a valid SqlConnection, on which to execute this command
/// a valid SqlTransaction, or 'null'
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParameters to be associated with the command or 'null' if no parameters are required
/// indicates whether the connection parameter was provided by the caller, or created by SqlHelper
///
private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership)
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters);
//create a reader
SqlDataReader dr;
// call ExecuteReader with the appropriate CommandBehavior
if (connectionOwnership == SqlConnectionOwnership.External)
dr = cmd.ExecuteReader();
else
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
return dr;
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction
/// using the provided parameters.
///
///
/// e.g.:
/// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null)
{
//create & open a SqlConnection
SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]);
cn.Open();
try
{
//call the private overload that takes an internally owned connection in place of the connection string
return ExecuteReader(cn, null, commandType, commandText, commandParameters, SqlConnectionOwnership.Internal);
}
catch
{
//if we fail to return the SqlDatReader, we need to close the connection ourselves
cn.Close();
throw;
}
}
else
//pass through to private overload, indicating that the connection is owned by the caller
return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
#endregion ExecuteReader
#region ExecuteScalar
///
/// 返回ExecuteScalar 只是传入一条sql语句
///
/// sql语句
///
public static object ExecuteScalar(string commandText)
{
return ExecuteScalar(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, (SqlParameter[])null);
}
public static object ExecuteScalar(string commandText, params SqlParameter[] commandParameters)
{
return ExecuteScalar(ConfigurationManager.AppSettings["ConnString"], CommandType.Text, commandText, commandParameters);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the database specified in
/// the connection string.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset) against the database specified in the connection string
/// using the provided parameters.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
/// a valid connection string for a SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create & open a SqlConnection, and dispose of it after we are done.
using (SqlConnection cn = new SqlConnection(connectionString))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteScalar(cn, commandType, commandText, commandParameters);
}
}
///
/// 返回ExecuteScalar 只是传入一条sql语句
///
/// sql语句
///
public static object ExecuteScalar(SqlConnection connection, string commandText)
{
return ExecuteScalar(connection, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static object ExecuteScalar(SqlConnection connection, string commandText, params SqlParameter[] commandParameters)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteScalar(connection, CommandType.Text, commandText, commandParameters);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters);
//execute the command & return the results
object retval = cmd.ExecuteScalar();
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
if (connection.State == ConnectionState.Open)
connection.Close();
return retval;
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static object ExecuteScalar(SqlTransaction transaction, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteScalar(transaction, CommandType.Text, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
///
public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlTransaction
/// using the provided parameters.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static object ExecuteScalar(SqlTransaction transaction, string commandText, params SqlParameter[] commandParameters)
{
return ExecuteScalar(transaction, CommandType.Text, commandText, commandParameters);
}
///
/// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlTransaction
/// using the provided parameters.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command
/// an array of SqlParamters used to execute the command
///
public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if (transaction == null)
{
//create & open a SqlConnection, and dispose of it after we are done.
using (SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["ConnString"]))
{
cn.Open();
//call the overload that takes a connection in place of the connection string
return ExecuteScalar(cn, commandType, commandText, commandParameters);
}
}
else
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
//execute the command & return the results
object retval = cmd.ExecuteScalar();
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
return retval;
}
}
#endregion ExecuteScalar
#region ExecuteXmlReader
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command using "FOR XML AUTO"
///
public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlConnection
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command using "FOR XML AUTO"
/// an array of SqlParamters used to execute the command
///
public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters);
//create the DataAdapter & DataSet
XmlReader retval = cmd.ExecuteXmlReader();
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
if (connection.State == ConnectionState.Open)
connection.Close();
return retval;
}
///
/// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction.
///
///
/// e.g.:
/// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders");
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command using "FOR XML AUTO"
///
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of SqlParameters
return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null);
}
///
/// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction
/// using the provided parameters.
///
///
/// e.g.:
/// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
///
/// a valid SqlTransaction
/// the CommandType (stored procedure, text, etc.)
/// the stored procedure name or T-SQL command using "FOR XML AUTO"
/// an array of SqlParamters used to execute the command
///
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
//create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
//create the DataAdapter & DataSet
XmlReader retval = cmd.ExecuteXmlReader();
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
return retval;
}
#endregion ExecuteXmlReader
#region CreateSqlConnection
public static SqlConnection CreateSqlConnection(string connectionString)
{
//create & open a SqlConnection
SqlConnection cn = new SqlConnection(connectionString);
try
{
cn.Open();
}
catch
{
//if we fail to return the SqlTransaction, we need to close the connection ourselves
cn.Close();
throw;
}
return cn;
}
public static SqlConnection CreateSqlConnection()
{
return CreateSqlConnection(ConfigurationManager.AppSettings["ConnString"]);
}
#endregion
#region ExecuteSqlCommand
public static SqlCommand ExecuteSqlCommand()
{
return ExecuteSqlCommand("", ConfigurationManager.AppSettings["ConnString"]);
}
public static SqlCommand ExecuteSqlCommand(string CmdText)
{
return ExecuteSqlCommand(CmdText, ConfigurationManager.AppSettings["ConnString"]);
}
public static SqlCommand ExecuteSqlCommand(SqlConnection cn)
{
if (cn.State == ConnectionState.Closed || cn.State == ConnectionState.Broken)
cn.Open();
try
{
return new SqlCommand("", cn);
}
catch
{
//if we fail to return the SqlCommand, we need to close the connection ourselves
cn.Close();
throw;
}
}
public static SqlCommand ExecuteSqlCommand(string connectionString, string CmdText)
{
//create & open a SqlConnection
SqlConnection cn = new SqlConnection(connectionString);
cn.Open();
try
{
return new SqlCommand(CmdText, cn);
}
catch
{
//if we fail to return the SqlCommand, we need to close the connection ourselves
cn.Close();
throw;
}
}
#endregion
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using QuestionsDbSLModel;
namespace QuestionsDbSL.Web.ClientBin
{
///
/// 用于进行通用数据转化的类
/// 将数据库中取出的数据通过 webserice传到SL端
///
public class ListBaseDataSet
{
///
/// 按列的次序，将值依次转换到ListBaseVar中
/// 按记录条数，将记录压到列表中
///
///
///
///
public static List
{
if (p_DataSet == null || p_DataSet.Tables.Count < 0)
return null;
if (p_TableIndex > p_DataSet.Tables.Count - 1)
return null;
if (p_TableIndex < 0)
p_TableIndex = 0;
DataTable p_Data = p_DataSet.Tables[p_TableIndex];
List
lock (p_Data)
{
for (int j = 0; j < p_Data.Rows.Count; j++)
{
BaseVars lbv = new BaseVars();
for (int k = 0; k < p_Data.Columns.Count; k++)
{
if (p_Data.Rows[j][k].GetType() == typeof(string))
{
lbv.ListString.Add(p_Data.Rows[j][k].ToString());
}
else if (p_Data.Rows[j][k].GetType() == typeof(int))
{
lbv.ListInt.Add((int)(p_Data.Rows[j][k]));
}
else if (p_Data.Rows[j][k].GetType() == typeof(bool))
{
lbv.ListBool.Add((bool)(p_Data.Rows[j][k]));
}
else if (p_Data.Rows[j][k].GetType() == typeof(byte))
{
lbv.ListByte.Add((byte)(p_Data.Rows[j][k]));
}
else if (p_Data.Rows[j][k].GetType() == typeof(float))
{
lbv.ListFloat.Add((float)(p_Data.Rows[j][k]));
}
else if (p_Data.Rows[j][k].GetType() == typeof(double))
{
lbv.ListDouble.Add((double)(p_Data.Rows[j][k]));
}
}
result.Add(lbv);
}
}
return result;
}
}
}