循环多个dropdownlist控件如何触发其它dropdownlist的SelectIndexChange事件?
我循环了几个dropdownlist控件,在设置autopostback=“true”以后用了SelectIndexChange事件,想让所有的dropdownlist控件都可以用这一个事件,但是只有第一个可以用这个事件,其它循环出来的都只有刷新,就是执行了autopostback,但是没有执行SelectIndexChange事件,源码显示所有dropdownlist的内容都是一样的,可是为什么只有第一个可以执行SelectIndexChange事件呢?前台页面代码
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebSite._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">
<div>
<%
for (int i = 0; i < 12; i++)
{
%>
<div style="width:100px; text-align:center; float:left;">
<asp:DropDownList ID="ddlistTry" runat="server" AutoPostBack="true" onselectedindexchanged="ddlistTry_SelectedIndexChanged">
</asp:DropDownList>
</div>
<%
}
%>
</div>
</form>
</body>
</html>
[code]
后台页面代码
[code=C#]
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
namespace WebSite
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.ddlistTry.Items.Clear();
for (int i = 1000; i < 1050; i++)
{
this.ddlistTry.Items.Add(i.ToString());
}
}
}
protected void ddlistTry_SelectedIndexChanged(object sender, EventArgs e)
{
Response.Write("<script>alert('" + this.ddlistTry.Text + "');</script>");
}
}
}
很简单的小例子,只想找到时哪里的问题! --------------------编程问答-------------------- 很简单的小例子,只想找到时哪里的问题!
补充:.NET技术 , ASP.NET