ASP.NET Tutorial/ASP.net Controls/UpdateProgress

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simultaneous calls are not allowed in a partial rendering page

   <source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" 

   Inherits="Default"%>

<!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>Using the Timer control</title>

</head> <body> 

       <form id="form1" runat="server">
           <asp:ScriptManager ID="ScriptManager1" runat="server" />
           
           <asp:Timer ID="Timer1" runat="server" Enabled="true" Interval="1000" 
               ontick="Timer1_Tick" />
           <asp:Button ID="Button1" runat="server" Text="Start task" 
               onclick="Button1_Click" />
               
           <asp:UpdateProgress ID="UpdateProgress1" runat="server" DynamicLayout="false">
               <ProgressTemplate> 
                   

                   <img src="loading.gif" />
               </ProgressTemplate>
           </asp:UpdateProgress>
           <asp:UpdatePanel ID="UpdatePanel1" runat="server">
               <ContentTemplate>
                   <asp:Label ID="Label1" runat="server" />
               </ContentTemplate>
               <Triggers>
                   <asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
               </Triggers>
           </asp:UpdatePanel>

<asp:UpdatePanel ID="UpdatePanel2" runat="server" RenderMode="Inline"> <ContentTemplate> <asp:Label ID="Label2" runat="server" /> </ContentTemplate> <Triggers> <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" /> </Triggers> </asp:UpdatePanel>

       </form>

</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; using System.Collections; using System.Linq; 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; using System.Threading; public partial class Default : System.Web.UI.Page { 

   protected void Timer1_Tick(object sender, EventArgs e)
   {
       Label2.Text = DateTime.Now.ToString();
   }
   protected void Button1_Click(object sender, EventArgs e)
   {
       Thread.Sleep(5000);
       Label1.Text = DateTime.Now.ToString();
   }

}</source>

Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/ASP.net_Controls/UpdateProgress&oldid=3345»