至少VS2008 sp1 以上
.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Temp.aspx.cs" Inherits="Temp" %>
.aspx.cs
using System;
public partial class Temp : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
Label1.Text = DropDownList1.SelectedValue;
}
}
