请教大家一个小问题
我是ASP.NET的初学者,我按照书上的例子试做一个程序,,,功能是选择不同的单选按钮显示不同的图片,,,可是不知道是哪里出了问题,,,选择按钮后图片不发生变化,请大家帮忙看看,,,下面是代码
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace Webxx2
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.RadioButtonList RadioButtonList1;
protected System.Web.UI.WebControls.Image Image1;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
Image1.ImageUrl=RadioButtonList1.Items[0].Value;
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.RadioButtonList1.SelectedIndexChanged += new System.EventHandler(this.RadioButtonList1_SelectedIndexChanged);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void RadioButtonList1_SelectedIndexChanged(object sender, System.EventArgs e)
{
Image1.ImageUrl=RadioButtonList1.SelectedItem.Value;
}
}
}
还有HTML代码
<%@ Page language= "c# " Codebehind= "WebForm1.aspx.cs " AutoEventWireup= "false " Inherits= "Webxx2.WebForm1 " %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN " >
<HTML>
<HEAD>
<title> WebForm1 </title>
<meta name= "GENERATOR " Content= "Microsoft Visual Studio .NET 7.1 ">
<meta name= "CODE_LANGUAGE " Content= "C# ">
<meta name= "vs_defaultClientScript " content= "JavaScript ">
<meta name= "vs_targetSchema " content= "http://schemas.microsoft.com/intellisense/ie5 ">
</HEAD>
<body MS_POSITIONING= "GridLayout ">
<form id= "Form1 " method= "post " runat= "server ">
<asp:RadioButtonList id= "RadioButtonList1 " style= "Z-INDEX: 101; LEFT: 112px; POSITION: absolute; TOP: 104px "
runat= "server ">
<asp:ListItem Value= "add.jpg " Selected= "True "> image1 </asp:ListItem>
<asp:ListItem Value= "BaseItemInout.jpg "> image2 </asp:ListItem>
<asp:ListItem Value=