c#中用asp的RadioButtonList控件总会遇到选中了，然后跟着就刷新整体页面，又变为没有选中状态。
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="demo.aspx.cs" Inherits="WebApplication2.demo" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:RadioButtonList ID="rb" runat="server" AutoPostBack="false" OnSelectedIndexChanged="displayMessage" />
<asp:Label ID="Label1" runat="server" />
</div>
</form>
</body>
</html>
后台：
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication2
{
public partial class demo : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//读取XML文件给chechbox赋值
DataSet ds = new DataSet();
ds.ReadXml(MapPath("XML.xml"));
rb.DataSource = ds;
rb.DataValueField = "value";
rb.DataTextField = "text";
rb.DataBind();
}
protected void displayMessage(object sender, EventArgs e)
{
Label1.Text = "Your favorite country is: " + rb.SelectedItem.Text;
}
}
}
就是应为AutoPostBack="true"导致的，改为AutoPostBack="false"就行。AutoPostBack="true"是表示当选中checkbox后完成后端方法然后刷新页面。
另外如果要让后台只第一次加载时执行在<%@ Page > 中加 EnableViewState="false"；