sql表值参数

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace SQLServerDAL //可以修改成实际项目的命名空间名称
{
 
    public abstract class DbHelperSQL
    {
      
        protected static string connectionString = @"Data Source=.;Initial Catalog=SGPZ;User Id=sa;Password=abc.123";
        public DbHelperSQL()
        {
        }
   

        public static DataSet RunProc(DataTable dt)
        {

            SqlConnection userConnection = new SqlConnection(connectionString);
            SqlCommand userCommand = new SqlCommand("p_student", userConnection);
            userCommand.CommandType = CommandType.StoredProcedure;//采用存储过程
            userCommand.Parameters.Add("@tstudent", SqlDbType.Structured);//存储过程参数
            userCommand.Parameters["@tstudent"].Value = dt;//给参数赋值
            userCommand.Connection.Open();

            SqlDataAdapter adapter = new SqlDataAdapter(userCommand);
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            return ds;
        }

        /**/
        /// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="SQLString">查询语句</param>
        /// <returns>DataSet</returns>
        public static DataSet Query(string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                DataSet ds = new DataSet();
                try
                {
                    connection.Open();
                    SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
                    command.Fill(ds, "ds");
                }
                catch (System.Data.SqlClient.SqlException ex)
                {
                    throw new Exception(ex.Message);
                }
                return ds;
            }
        }

    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Data.SqlClient;

namespace WindowsFormsApplication11
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
          

        }

        private void button1_Click(object sender, EventArgs e)
        {
          
            System.Diagnostics.Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start(); //  开始监视代码运行时间

            DataSet dt = SQLServerDAL.DbHelperSQL.Query("select  * from student ");
            dataGridView1.DataSource = SQLServerDAL.DbHelperSQL.RunProc( dt.Tables[0]).Tables[0].DefaultView;

            stopwatch.Stop(); //  停止监视
            TimeSpan timespan = stopwatch.Elapsed; //  获取当前实例测量得出的总时间
            double hours = timespan.TotalHours; // 总小时
            double minutes = timespan.TotalMinutes;  // 总分钟
            double seconds = timespan.TotalSeconds;  //  总秒数
            double milliseconds = timespan.TotalMilliseconds;  //  总毫秒数
            MessageBox.Show(seconds.ToString());
        }

     
    }

}

USE [SGPZ]
GO
/****** Object:  StoredProcedure [dbo].[p_student]    Script Date: 07/05/2013 17:19:31 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROC [dbo].[p_student]
@tstudent  tstudent READONLY
AS
begin
SELECT * INTO #tstudent  FROM @tstudent
UPDATE #tstudent SET STUNAME='周杰伦'
SELECT * FROM #tstudent
DROP TABLE #tstudent
END