照书上改了一下，一个简单的查询结果，用到了
Sqlconnection
Sqlcommand
SqlDataReader
表：Sell
存储过程：GetProduct
========================================
CREATE PROCEDURE GetProduct
(
@strName varchar(50)
)
AS
Select @strName=RTRIM(@strName) + '%'
SELECT SellID ,ProductName, UnitCost, Number
FROM Sell
WHERE (ProductName like @strName)
RETURN
GO
=========================================
使用DataReader处理数据库时的流程图
1)使用SqlCommand对象执行sql语句
2)将SqlCommand读取的数据放在DataReader中
3)对DataReader数据进行处理显示
代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="conn1.aspx.cs" Inherits="conn1" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Search" /> <br /> <br /> <asp:Label ID="Label1" runat="server"></asp:Label></div> </form></body></html>CS代码：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class conn1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "";//清空结果
SqlConnection myconn = new SqlConnection("server=localhost;database=OnNetBookSell;uid=sa;pwd=123");
//定义command
SqlCommand mycmd = new SqlCommand();
mycmd.Connection = myconn;
mycmd.CommandType = CommandType.StoredProcedure;
mycmd.CommandText = "GetProduct";
//增加一个参数
SqlParameter sqlparam = new SqlParameter("@strName", SqlDbType.NVarChar, 50);
sqlparam.Value = TextBox1.Text;
mycmd.Parameters.Add(sqlparam);
myconn.Open();
//执行并显示
SqlDataReader myreader = mycmd.ExecuteReader();
while (myreader.Read())
{
Label1.Text += myreader["ProductName"];
Label1.Text += "<br>";
}
myconn.Close();
myreader.Close();
}
}
