webform1.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="dynamicweb4_7.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>
<asp:Panel ID="plContent" runat="server">
<h3>建议反馈</h3>
<asp:Label ID="Label1" runat="server" Text="如对本网站有任何改进建议，请在下面输入框中填写："></asp:Label><br />
<asp:TextBox ID="txtSuggestion" runat="server" TextMode="MultiLine" Width="350px" Height="150px"></asp:TextBox><br />
<asp:Button ID="Button1" runat="server" Text="提交" OnClick="Button1_Click" />
</asp:Panel>
<asp:Panel ID="plTips" runat="server" Visible="false" Height="50" BorderStyle="Solid" BorderWidth="1">
<h3>谢谢你的宝贵建议！</h3>
</asp:Panel>
</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 dynamicweb4_7
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(txtSuggestion.Text))
{
plContent.Visible = false;
plTips.Visible = true;
}
}
}
}