AsyncPostBackError event, alert box not showing RSS

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  jasony002

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  2 Posts

  AsyncPostBackError event, alert box not showing

  Dec 27, 2012 10:25 PM|LINK

  <div>I've stuck here for days. Any help is appreciated. </div> <div></div> <div>I am using ajax toolkit 3.5 and visual studio 2008. From what I read, the default behavior when an exception is thrown during partial page update is an alert window. But I couldn't get it to work.</div> <div></div> <div>When an exception is throw during partial page update, I set the AsyncPostBackErrorMessage in ScriptManager1_AsyncPostBackError event. But the alert window is not showing, nothing happened. </div> <div></div> <div>Here is what I did:</div>

  • I created a website project, added a web form default.aspx
  • I added a ScriptManager in the aspx page:

  <asp:ScriptManager
  ID="ScriptManager1"
  runat="server"
  EnablePartialRendering="true"
  OnAsyncPostBackError="ScriptManager1_AsyncPostBackError">
  </asp:ScriptManager>

  • I added an UpdatePanel in the aspx page:

  <asp:UpdatePanel ID="UpdatePanel1" runat="server">
  <ContentTemplate>
  <asp:Label ID="Label1" runat="server" Text="This is a label!"></asp:Label><br />
  <asp:Button ID="Button1" runat="server" Text="Click Me" OnClick="Button1_Click" />
  </ContentTemplate>
  </asp:UpdatePanel>

  • I throw an exception in the button click event in code behind aspx.cs:

  protected void Button1_Click(object sender, EventArgs e)
  {
  Label1.Text = "You clicked the button!";
  throw new ApplicationException("an error");
  }

  •  I set the AsyncPostBackErrorMessage in ScriptManager1_AsyncPostBackError event in code behind aspx.cs:

  protected void ScriptManager1_AsyncPostBackError(object sender, AsyncPostBackErrorEventArgs e)
  {
  ScriptManager1.AsyncPostBackErrorMessage = e.Exception.Message; 
  }

  • I browse to the page, click the button, nothing happened
  • I debug the code. I see the exception was thrown, and the AsyncPostBackErrorMessage was set, then nothing happened.

  What else should I do to let ajax display the alert window?

  Thanks a lot. 

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  kedarrkulkar...

  All-Star

  35559 Points

  5698 Posts

  Re: AsyncPostBackError event, alert box not showing

  Dec 28, 2012 02:31 AM|LINK

  did u add EndRequestHandler in javascript code... like shown here

  http://www.codeproject.com/Articles/32569/Error-Handling-Customization-for-ASP-NET-UpdatePan

  http://stackoverflow.com/questions/1364907/update-panel-not-showing-errors-in-asp-net-3-5

  hope this helps...

  Cheers!
  KK
  
  Please mark as Answer if post helps in resolving your issue
  My Site
  • Marked as answer by jasony002 on Dec 28, 2012 04:13 PM
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  jasony002

  Member

  1 Points

  2 Posts

  Re: AsyncPostBackError event, alert box not showing

  Dec 28, 2012 04:15 PM|LINK

  Thanks a lot! I googled a long time but didn't find an answer. I should improve my google skills:)

  Thanks! It works!