C#中调用SQL存储过程(带输入输出参数的例子)

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace StoreProduceTest
{
public class Program
{
/**
* 存储过程
*
* create procedure queryStuNameById
@stuId varchar(10),--输入参数
@stuName varchar(10) output --输出参数
as
select @stuName=stuName from stuInfo where stuId=@stuId
*
*/

static void Main(string[] args)
{
Operater op = new Operater();
string name = op.QueryStuNameById("1234");

Console.WriteLine(string.Format("学号为1234的学生的姓名为{0}", name));
}

}

public class Operater
{
private string ConStr = "server=.;database=User;uid=sa;pwd=1234";
private SqlConnection sqlCon = null;
private SqlCommand sqlComm = null;
SqlDataReader dr = null;

public string QueryStuNameById(string Id)
{

string name = "";

try
{
using (sqlCon = new SqlConnection(ConStr))
{

sqlCon.Open();
sqlComm = new SqlCommand("queryStuNameById", sqlCon);
//设置命令的类型为存储过程
sqlComm.CommandType = CommandType.StoredProcedure;

//设置参数
sqlComm.Parameters.Add("@stuId", SqlDbType.VarChar);
//注意输出参数要设置大小,否则size默认为0,
sqlComm.Parameters.Add("@stuName", SqlDbType.VarChar, 10);
//设置参数的类型为输出参数,默认情况下是输入,
sqlComm.Parameters["@stuName"].Direction = ParameterDirection.Output;

//为参数赋值
sqlComm.Parameters["@stuId"].Value = "1234";
//执行
sqlComm.ExecuteNonQuery();
//得到输出参数的值,把赋值给name,注意,这里得到的是object类型的,要进行相应的类型轮换
name = sqlComm.Parameters["@stuName"].Value.ToString();

}

}
catch (Exception ex)
{

Console.WriteLine(ex.ToString());
}
return name;

}
}

}