有关ASP.NET中的UpdateProgress控件的使用

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前台代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UpdateProgress.aspx.cs" Inherits="UpdateProgress" %>

<%@ 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">

<div>

<asp:Label ID="lheader" runat="server" Font-Bold="True" Font-Size="Large" Text="使用UpdateProgress控件"> </asp:Label> <br />

<hr />

  </div>

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<asp:Label ID="linfo" runat="server" Text="单击下面按钮进行测试"> </asp:Label> <br />

<asp:Button ID="btTest" runat="server" OnClick="btTest_Click" Text="测试" /> <br />

<asp:Label ID="lResult" runat="server"> </asp:Label> 
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">

Loading..... </span>

</ProgressTemplate>

        </asp:UpdateProgress>
            </ContentTemplate>

</asp:UpdatePanel>

</form>
</body>
</html>
后台代码：

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

    }
    protected void btTest_Click(object sender, EventArgs e)
    {

//设置延迟时间，以便能显示UpdateProgress控件

        System.Threading.Thread.Sleep(6000);

        string strMsg = "欢迎光临盛唐软件开发有限公司 <br >";

strMsg += "当前时间是：" + DateTime.Now.ToString();

lResult.Text = strMsg;

}
}