webform1.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test4_6.WebForm1" %>
<!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>
付款地址:<asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine" Height="45px" Width="199px"></asp:TextBox>
<br />
发货地址:<asp:TextBox ID="TextBox2" runat="server" TextMode="MultiLine" Height="45px" Width="199px"></asp:TextBox>
<br /><br />
<asp:CheckBox ID="CheckBox1" runat="server" Text="发货地址与付款地址相同" AutoPostBack="True" OnCheckedChanged="CheckBox1_CheckedChanged" />
</div>
</form>
</body>
</html>
webform1.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace test4_6
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
if (CheckBox1.Checked)
{
TextBox2.Text = TextBox1.Text;
}
else
{
TextBox2.Text = "";
}
}
}
}