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Ajax Event Confirmation Tag

  1. #1
    Apr 17, 2009, 12:12 PM

    Ajax Event Confirmation Tag

    Greetings.

    I have a problem with the confirmation tag for a button's ajax event. The confirmation box appears, but when you click "Yes" to confirm, I receive the following exception in a client-side popup window:

    [NullReferenceException: Object reference not set to an instance of an object.]
   Coolite.Ext.Web.ScriptManager.FireAsyncEvent(String eventName, ParameterCollection extraParams) +109
Coolite.Ext.Web.ScriptManager.RaisePostBackEvent(String eventArgument) +2138
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +175
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565
    Here is my button:
    <ext:Button ID="btnCancel" Enabled="true" IconCls="icon-cancel" Text="Cancel" runat="server">
      <AjaxEvents>
            <Click OnEvent="btnCancel_Click" Success="storeActiveTasks.load(); btnCancel.disable();">
                    <Confirmation ConfirmRequest="true" Title="Confirmation" Message="Cancel this task?"/>  
            </Click>
      </AjaxEvents>
</ext:Button>
    Any thoughts on what could be wrong? All the other events in my page work just fine, so I don't believe there's an issue with the script manager; however, the stack trace seems to hint otherwise.

    Notes:
    - I am using a master page.
    - If I remove the confirmation tag, the ajax event works just fine.

    Thanks,
    -Koz
  2. #2
    Apr 17, 2009, 1:45 PM

    RE: Ajax Event Confirmation Tag

    Hi,

    Can you show full example which reproduces the error? I can't reproduce the exception therefore I need your sample
    *
  3. #3
    Apr 17, 2009, 3:01 PM

    RE: Ajax Event Confirmation Tag

    Hmmm, I won't be able to post the whole thing, but I will try to come up with a smaller example for you.

    Thanks.
  4. #4
    Apr 17, 2009, 3:57 PM

    RE: Ajax Event Confirmation Tag

    k, I tried to come up with as simple of an example as I could, but still maintain similar code-paths as my actual application, and I still receive an error.


    Master Page:

    <%@ Master Language="VB" AutoEventWireup="false" CodeBehind="StandardPageMaster.master.vb" Inherits="TestCooliteConfirm.StandardPageMaster" %>
<%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>

<!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>Untitled Page</title>
</head>
<body id="MasterBody">
    <form id="form1" runat="server">
    <ext:ScriptManager ID="extScriptMgr" runat="server" IDMode="Static"></ext:ScriptManager>
    
    <asp:ContentPlaceHolder ID="body" runat="server">     
    </asp:ContentPlaceHolder>
    </form>
</body>
</html>
    And a form:

    frmMain.aspx
    <%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/StandardPageMaster.Master" CodeBehind="frmMain.aspx.vb" Inherits="TestCooliteConfirm.frmMain" %>
<%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>
<asp:Content ID="Content2" ContentPlaceHolderID="body" runat="server">
    <ext:Panel>
        <TopBar>
            <ext:Toolbar runat="server">
                <Items>
                      <ext:Button ID="btnCancel" Enabled="true" IconCls="icon-cancel" Text="Cancel" runat="server">
                            <AjaxEvents>
                                <Click OnEvent="btnCancel_Click">
                                     <Confirmation ConfirmRequest="true" Title="Confirmation" Message="Are you sure you want to delete this task?" />
                                     <EventMask Msg="Cancelling..." ShowMask="true" MinDelay="500" />                   
                                </Click>                    
                            </AjaxEvents>
                        </ext:Button>
                
                </Items>
            </ext:Toolbar>
        
        </TopBar>
    </ext:Panel>

</asp:Content>
    frmMain.aspx.vb
    Imports Coolite.Ext.Web

Partial Public Class frmMain
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub


    <Coolite.Ext.Web.AjaxMethod()> _
   Public Sub btnCancel_Click(ByVal sender As Object, ByVal e As AjaxEventArgs)
        If Debugger.IsAttached Then Debugger.Break()
    End Sub
End Class

    With this setup, I get an exception when I click the "Cancel" button.
    However, if I remove the Confirmation Tag from the event, it works as expected.

    Thanks again.
    -akozmic


  5. #5
    Apr 18, 2009, 3:08 AM

    RE: Ajax Event Confirmation Tag

    Hi,

    For me your sample works fine. What version do you use?


    P.S. AjaxMethod attribute is not required for AajxEvent handler
  6. #6
    Apr 20, 2009, 10:27 AM

    RE: Ajax Event Confirmation Tag

    *The assembly shows:* 0.8.0.15573

    Thanks.
  7. #7
    Apr 20, 2009, 7:23 PM

    RE: Ajax Event Confirmation Tag

    FIXED: We upgraded our coolite dlls this afternoon, and the problem no longer exists.

    Thanks for your help!

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