asp.net 使用radiobuttonlist的困惑 (使用关键词New创建实例)
折腾了一天了，精疲力尽了已经。贴到这里求救，救命啊！
页面部分：
<body>
<form id= "form1 " runat= "server ">
<div>
<asp:RadioButtonList ID= "RadioButtonList1 " runat= "server ">
</asp:RadioButtonList> </div>
<asp:Button ID= "Button1 " runat= "server " OnClick= "Button1_Click " Text= "Button " />
</form>
</body>
</html> cs部分方案一：
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.RadioButtonList1.Items.Add(new ListItem( "test1 ", "test1 "));
this.RadioButtonList1.Items.Add(new ListItem( "test2 ", "test2 "));
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Write(this.RadioButtonList1.SelectedItem.Value);
}cs部分方案二：
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.RadioButtonList1.Items.Add(new ListItem( "test1 ", "test1 "));
this.RadioButtonList1.Items.Add(new ListItem( "test2 ", "test2 "));
}
}
protected void Button1_Click(object sender, EventArgs e)
{
RadioButtonList rbl = new RadioButtonList();
rbl = (RadioButtonList)Page.FindControl( "RadioButtonList1 ");
Response.Write(rbl.SelectedItem.Value);
}
尝试阿尝试 ，无尽的尝试，最终还是一个“请使用关键词New创建实例”，已经无语了，高手路过，请抽时间帮帮小弟，现在都共产主义社会了，总该有点共产主义精神吧？
[解决办法]
把你的方案一改了一下
如下代码
ＣＳ代码
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.RadioButtonList1.Items.Add(new ListItem( "test1 ", "test1 "));
this.RadioButtonList1.Items.Add(new ListItem( "test2 ", "test2 "));
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Write(this.RadioButtonList1.SelectedItem.Value);
for (int i = 0; i < RadioButtonList1.Items.Count; i++)
{
if (RadioButtonList1.Items[i].Selected)
{
Literal1.Text += RadioButtonList1.Items[i].Value;
}
}
}
前台：
<body>
<form id= "form1 " runat= "server ">
<div>
<asp:RadioButtonList ID= "RadioButtonList1 " runat= "server ">
</asp:RadioButtonList> <asp:Literal ID= "Literal1 " runat= "server "> </asp:Literal> </div>
<asp:Button ID= "Button1 " runat= "server " OnClick= "Button1_Click " Text= "Button " />
</form>
</body>
</html>
[解决办法]
因为页面回传以后，你刚才动态添加的两项就没有了
[解决办法]
我好象没怎么改代码，怎么运行正常呢...
//aspx
<%@ Page Language= "C# " AutoEventWireup= "true " CodeBehind= "Default.aspx.cs " Inherits= "WebDemo.Default " %>
<!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 ">
<asp:RadioButtonList ID= "RadioButtonList1 " runat= "server ">
</asp:RadioButtonList>
<asp:Button ID= "Button1 " runat= "server " OnClick= "Button1_Click " Text= "Button " />
</form>
</body>
</html>
//aspx.cs
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;
namespace WebDemo
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.RadioButtonList1.Items.Add(new ListItem( "test1 ", "test1 "));
this.RadioButtonList1.Items.Add(new ListItem( "test2 ", "test2 "));
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Write(this.RadioButtonList1.SelectedItem.Value);
}
}
}
[解决办法]
肯定不是版本的问题..
[解决办法]
1.
看代码应该是没有问题的，
比较可能出现在，VS自动维护的另一个partial 类，此类声明你拖到的.aspx 上面的服务器控件，有可能此文件已经损坏，
LZ 可以尝试重新建立页面，拷贝 .aspx 和 .aspx.cs 过来试试
2.
其实，你应该告诉我们是编译错误，还是运行时错误，错误时哪一行等信息
便于分析，你省时，我也省力
Try it!
Good Luck!
@amandag(高歌)
因为页面回传以后，你刚才动态添加的两项就没有了
-----------
这里 postback 之后，那两项应该是存在的！