DbHelper数据库通用类使用方法
代码
//
执行SQL语句
public
static
void
ExecSqlCommand()
{
DbHelper db
=
new
DbHelper();
DbCommand command
=
db.GetSqlStringCommond(
"
select * from t1_insert
"
);
db.ExecuteNonQuery(command);
}
//
执行存储过程
public
static
void
ExecStoredProcedure()
{
DbHelper db
=
new
DbHelper();
DbCommand command
=
db.GetStoredProcCommond(
"
t1_insert
"
);
db.AddInParameter(command,
"
@id
"
, DbType.String,
"
heihei
"
);
db.AddInParameter(command,
"
@id
"
, DbType.String,
"
heihei
"
);
db.ExecuteNonQuery(command);
}
//
返回DataTable
public
static
void
GetDataTable()
{
DbHelper db
=
new
DbHelper();
DbCommand command
=
db.GetSqlStringCommond(
"
t1_findall
"
);
DataTable dt
=
db.ExecuteDataTable(command);
}
//
获取各种返回值
public
static
void
GetAllParameter()
{
DbHelper db
=
new
DbHelper();
DbCommand command
=
db.GetStoredProcCommond(
"
t2_insert
"
);
db.AddInParameter(command,
"
@timeticks
"
, DbType.Int64, DateTime.Now.Ticks);
db.AddOutParameter(command,
"
@outString
"
, DbType.String,
20
);
db.AddReturnParameter(command,
"
@returnValue
"
, DbType.Int32);
db.ExecuteNonQuery(command);
string
s
=
db.GetParameter(command,
"
@outString
"
).Value
as
string
;
//
out parameter
int
r
=
Convert.ToInt32(db.GetParameter(command,
"
@returnValue
"
).Value);
//
return value
}
//
DateReader操作
public
static
void
GetDataReader()
{
DbHelper db
=
new
DbHelper();
DbCommand command
=
db.GetStoredProcCommond(
"
t2_insert
"
);
db.AddInParameter(command,
"
@timeticks
"
, DbType.Int64, DateTime.Now.Ticks);
db.AddOutParameter(command,
"
@outString
"
, DbType.String,
20
);
db.AddReturnParameter(command,
"
@returnValue
"
, DbType.Int32);
using
(DbDataReader reader
=
db.ExecuteReader(command))
{
//
dt.Load(reader);
}
string
s
=
db.GetParameter(command,
"
@outString
"
).Value
as
string
;
//
out parameter
int
r
=
Convert.ToInt32(db.GetParameter(command,
"
@returnValue
"
).Value);
//
return value
}
//
获取DataSet
public
static
void
GetDataSet()
{
DbHelper db
=
new
DbHelper();
DbCommand command
=
db.GetSqlStringCommond(
"
select * from t1
"
);
DataSet ds
=
db.ExecuteDataSet(command);
}
//
事务的使用.(项目中需要将基本的数据库操作组合成一个完整的业务流时,代码级的事务是必不可少的哦)
public
void
DoBusiness()
{
using
(Trans t
=
new
Trans())
{
try
{
D1(t);
throw
new
Exception();
//
如果有异常,会回滚滴
D2(t);
t.Commit();
}
catch
{
t.RollBack();
}
}
}
public
void
D1(Trans t)
{
DbHelper db
=
new
DbHelper();
DbCommand cmd
=
db.GetStoredProcCommond(
"
t2_insert
"
);
db.AddInParameter(cmd,
"
@timeticks
"
, DbType.Int64, DateTime.Now.Ticks);
db.AddOutParameter(cmd,
"
@outString
"
, DbType.String,
20
);
db.AddReturnParameter(cmd,
"
@returnValue
"
, DbType.Int32);
if
(t
==
null
)
db.ExecuteNonQuery(cmd);
else
db.ExecuteNonQuery(cmd,t);
string
s
=
db.GetParameter(cmd,
"
@outString
"
).Value
as
string
;
//
out parameter
int
r
=
Convert.ToInt32(db.GetParameter(cmd,
"
@returnValue
"
).Value);
//
return value
}
public
void
D2(Trans t)
{
DbHelper db
=
new
DbHelper();
DbCommand cmd
=
db.GetSqlStringCommond(
"
insert t1 (id)values(‘..‘)
"
);
if
(t
==
null
)
db.ExecuteNonQuery(cmd);
else
db.ExecuteNonQuery(cmd, t);
}
其中 DbCommand 位于 using System.Data.Common 命名空间
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