UpdatePanel区域内与区域外为什么会一起刷新
设计一个页面。现只要UpdatePanel内刷新,而页面的其它部分不刷新。页面设计代码如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="testScriptManager.aspx.cs" Inherits="testScriptManager" %>
<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
Namespace="System.Web.UI" TagPrefix="asp" %>
<!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>
</div>
<br />
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label><br />
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<br />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br /><br />
<asp:Button ID="Button1" runat="server" Height="39px" Text="Button" Width="136px" OnClick="Button1_Click" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
后台代码如下:
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;
public partial class testScriptManager : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Label2.Text = DateTime.Now.ToString();
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = DateTime.Now.ToString();
}
}
但是当我点击按钮时,整个页面一起刷新了,而不只是UpdatePanel区域内刷新。为什么