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;

        }
    }

}