日期:2014-05-18  浏览次数:20414 次

母版中使用UpdateProgress控件遇到的奇怪问题?!
我在母版中使用UpdateProgress控件,控件的内容都不见显示,页面代码:
<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
  <asp:ScriptManager id="ScriptManager1" runat="server">
  </asp:ScriptManager>
  <asp:UpdatePanel id="UpdatePanel1" runat="server">
  <contenttemplate>
<asp:Label id="Label1" runat="server" Text="Label" __designer:wfdid="w21"></asp:Label> 
</contenttemplate>
  </asp:UpdatePanel>
  <asp:Button ID="btn_1" runat="server" OnClick="Button1_Click" Text="Button" />
  <asp:UpdateProgress id="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
  <progresstemplate>
<IMG src="js/progressbar_long_green.gif" />
</progresstemplate>
  </asp:UpdateProgress>
</asp:Content>


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 Default2 : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {

  }
  protected void Button1_Click(object sender, EventArgs e)
  {
  System.Threading.Thread.Sleep(3000);
  Label1.Text = "fsadgklasdjglkjasdglj";
  }
}

但是如果不用母版,UpdateProgress里面的内容是可以显示出来的,这是什么问题呢?

------解决方案--------------------
母页
HTML code
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>
<%@ 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>
        <asp:ScriptManager id="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:contentplaceholder id="ContentPlaceHolder1" runat="server">
        </asp:contentplaceholder>
    </div>
    </form>
</body>
</html>

------解决方案--------------------
你的问题可能是在内容页缺少
<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
Namespace="System.Web.UI" TagPrefix="asp" %>