C#存儲過程使用例子

  try   something   like   the   following,   note,   you   have   to   close   Reader   first   

cmd   =   new   SqlCommand("aaaa",conn);   
cmd.CommandType   =   CommandType.StoredProcedure;   
cmd.Parameters.Add("@ret",   SqlDbType.Int);   
cmd.Parameters["@ret"].Direction   =   ParameterDirection.Output;   

SqlDataReader   reader   =   cmd.ExecuteReader();   
while   (reader.Read())   
{   
//   
}   

reader.Close();   

int   ret   =   (int)cmd.Parameters["@ret"].Value;
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1.獲取Return返回值

 程序代碼//存儲過程
//Create PROCEDURE MYSQL
//     @a int,
//     @b int
//AS
//     return @a + @b
//GO
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LocalSqlServer"].ToString());
conn.Open();
SqlCommand MyCommand = new SqlCommand("MYSQL", conn);
MyCommand.CommandType = CommandType.StoredProcedure;
MyCommand.Parameters.Add(new SqlParameter("@a", SqlDbType.Int));
MyCommand.Parameters["@a"].Value = 10;
MyCommand.Parameters.Add(new SqlParameter("@b", SqlDbType.Int));
MyCommand.Parameters["@b"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@return", SqlDbType.Int));
MyCommand.Parameters["@return"].Direction = ParameterDirection.ReturnValue;
MyCommand.ExecuteNonQuery();
Response.Write(MyCommand.Parameters["@return"].Value.ToString());
2.獲取Output輸出參數值

 程序代碼

//存儲過程
//Create PROCEDURE MYSQL
//     @a int,
//     @b int,
//     @c int output
//AS
//     Set @c = @a + @b
//GO
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LocalSqlServer"].ToString());
conn.Open();
SqlCommand MyCommand = new SqlCommand("MYSQL", conn);
MyCommand.CommandType = CommandType.StoredProcedure;
MyCommand.Parameters.Add(new SqlParameter("@a", SqlDbType.Int));
MyCommand.Parameters["@a"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@b", SqlDbType.Int));
MyCommand.Parameters["@b"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@c", SqlDbType.Int));
MyCommand.Parameters["@c"].Direction = ParameterDirection.Output;
MyCommand.ExecuteNonQuery();
Response.Write(MyCommand.Parameters["@c"].Value.ToString());

 

 

----------------------存儲過程共有三種返回值------------------- 
/*（一）、參數返回值@parm2； 
（二）、過程返回值return 100； 
（三）、數據集返回值select * from table1 where age = @parm1 
請問，如何獲得三類返回值？ 
*/ 
create table table1( 
name varchar(30), 
age integer, 
primary key(name, age) 
) 

create procedure proc1 
@parm1 integer, 
@parm2 varchar(30) output 
as 
select @parm2 = 'zhongguo' 
select * from table1 where age = @parm1 
return 100 

--（一）、參數返回值@parm2； 
declare @re varchar(30) 
exec proc1 1,@re out 
select 返回結果=@re 

--（二）、過程返回值return 100； 
declare @re int,@parm2 varchar(30) 
exec @re=proc1 1,@parm2 out 
select 返回結果=@re 

--（三）、數據集返回值select * from table1 where age = @parm1 
--定義返回結果保存的臨時表(由於是返回記錄集,因此要用臨時表) 
--調用返回結果 
--declare @re varchar(30) 
--insert #re exec proc1 1,@re out 
select * into #re from OPENROWSET('SQLOLEDB', 
'SERVER=zhou;uid=sa;pwd=zhou;Database=pubs','SET FMTONLY OFF;SET NOCOUNT ON declare @re varchar(30) exec proc1 ''1'',@re out') as a 
--顯示結果 
select * from #re 
--處理完成後刪除臨時表 
drop table #re 



--返回數據集方式一: 
/*補充*/ 
execute sp_executesql 
N'select * from pubs.dbo.employee where job_lvl = @level', 
N'@level tinyint', 
@level = 35 
或者多條件 
execute sp_executesql 
N'select * from IndividualSaleHouse where user_ID = @user_ID and Area_ID=@Area_ID ', 
N'@user_ID int,@Area_ID int', 
@user_ID = 1,@Area_ID=1 


--返回單個值: 
/* 補充 */ 
declare @sql nvarchar(200) 
declare @cnt int 
set @sql=N'select @cnt=count(*) from WQ_STINFO_B ' 
exec sp_executesql @sql,N'@cnt int output',@cnt output