C#中使用存储过程

首先创建存储过程，sql语句如下所示：

USE [YCYFFJKXT]
GO
/****** 对象: StoredProcedure [dbo].[Login_UserCount] 脚本日期: 07/17/2012 14:53:18 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROC [dbo].[Login_UserCount]
@ZH VARCHAR（20）,
@MM varchar（50）,
@Rowcount INT OUTPUT
AS
BEGIN
SELECT * FROM YHXX WHERE ZH=@ZH and MM=@MM
SET @Rowcount=@@ROWCOUNT
END

C#中调用

SqlConnection conn_Local = new SqlConnection（）;
conn_Local.ConnectionString = "server=.;database=YCYFFJKXT;user id=sa;password=sa";
try
{
conn_Local.Open（）;
SqlCommand cmd_Count = new SqlCommand（"Login_UserCount",conn_Local）;
cmd_Count.CommandType = CommandType.StoredProcedure;
//添加输入查询参数、赋予值
cmd_Count.Parameters.Add（"@ZH", SqlDbType.VarChar）;
cmd_Count.Parameters.Add（"@MM",SqlDbType.VarChar）;
cmd_Count.Parameters["@ZH"].Value = "A";
cmd_Count.Parameters["@MM"].Value = "B";
//添加输出参数
cmd_Count.Parameters.Add（"@Rowcount", SqlDbType.Int）;
cmd_Count.Parameters["@Rowcount"].Direction = ParameterDirection.Output;
cmd_Count.ExecuteNonQuery（）;
Console.WriteLine（"受影响的行数是"+cmd_Count.Parameters["@Rowcount"].Value.ToString（））;
}
catch （Exception ex）
{
throw ex;
}
finally
{
conn_Local.Close（）;
}
Console.ReadLine（）;