ado.net的连接显示实例

最新推荐文章于 2024-01-06 14:18:36 发布

superdont

最新推荐文章于 2024-01-06 14:18:36 发布

阅读量1.6k

点赞数

CC 4.0 BY-SA版权

文章标签： server string xhtml object asp html

本文链接：https://blog.youkuaiyun.com/superdont/article/details/1498562

本文介绍了一个使用ASP.NET连接SQL Server并读取数据库中数据的示例。通过具体的C#代码展示了如何配置连接字符串、执行SQL查询及处理查询结果。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

从昨天晚上开始调试，终于调试成功，下面是代码。

web.config中的部分。
<configuration>
<add name="sqlconn"
connectionString="server=LILIZONG;database=dangwei;uid=sa;" providerName="System.Data.SqlClient"/>
</connectionStrings>

显示页的cs部分。

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 test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!Page.IsPostBack){TestCommandReader();}
    }

    private void TestCommandReader()
    {
        String myConnectionString=ConfigurationManager.ConnectionStrings["sqlconn"].ConnectionString;
        SqlConnection myConn=new SqlConnection(myConnectionString);
        //SqlConnection myConn=new SqlConnection(myConnectionString);
        String cmdText="select * from geren";
        SqlCommand myCommand=new SqlCommand(cmdText,myConn);

        try
        {
            myConn.Open();
            SqlDataReader mydr=myCommand.ExecuteReader();
            while(mydr.Read())
            {
                Userlist.Items.Add(new ListItem((String)mydr["name"]));}

            mydr.Close();
            SqlDataReader mydrOther=myCommand.ExecuteReader();
            //UserOtherList.DateSource=mydrOther;
            UserOtherList.DataSource = mydrOther;

            //UserOtherList.datatextfield="name";
            //UserOtherList.datavaluefield = "birthday";
           //UserOtherList.databind();
            //mydrOther.close();
            UserOtherList.DataTextField = "name";
            UserOtherList.DataValueField = "birthday";
            UserOtherList.DataBind();
            mydrOther.Close();
        }
        catch(SqlException sqlex)
        {
            Response.Write(sqlex.Message+"<br>");
        }
        finally{
            myConn.Close();
        }
    }
    protected void Userlist_SelectedIndexChanged(object sender, EventArgs e)
    {

    }
}

显示页aspx部分：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>

<!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>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ListBox ID="Userlist" runat="server" Height="400px" Width="300px">
    </asp:ListBox>
    <asp:ListBox ID="UserOtherList" runat="server" Height="400px" Width="300px" ></asp:ListBox>
    </form>
</body>
</html>