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[CLOSED] [1.0] Global error handling of DirectMethods

  1. #1
    Jul 21, 2010, 9:27 PM

    [CLOSED] [1.0] Global error handling of DirectMethods

    I am able to implement global error handling for DirectEvents since they run through normal asp.net page life cycle. However, I am not able to globally handle shared/static DirectMethods. When an error occurs, the Global.asax's Application_Error event does not fire. Looking in DirectRequestModule.cs, I notice that any DirectMethods exception is handled by Ext.net. Is it possible to expose a way for me to hook into that? It was suggested that I catch the error on the clientside, but that is not ideal. I need to log the error to the database because we track and log every exception thrown in the application. Firing off another DirectMethod to just log the error seems a little goofy to me. What if that DirectMethod fails too? Then it will go into an infinite loop.

    DirectRequestModule.cs
           private void ProcessRequest(HttpApplication app, HttpRequest request)
        {
            DirectResponse responseObject = new DirectResponse(true);

            try
            {
               // ... do stuff
            }
            catch (Exception e)
            { 
                // I want a hook into here!!!!  So I can log the exception to the database for history/tracking purposes.  This must occur on serverside and not clientside.
                responseObject.Success = false;
                responseObject.ErrorMessage = IsDebugging ? e.ToString() : e.Message;
            }

            // ... process request
            app.CompleteRequest();
        }
    Last edited by Daniil; Jul 26, 2010 at 9:24 AM.
  2. #2
    Jul 21, 2010, 10:02 PM
    Hi,

    What if to set RethrowAjaxExceptions="true" for the ResourceManager? Does it solve your issue?
  3. #3
    Jul 21, 2010, 10:50 PM
    What does that property do? I searched for RethrowAjaxExceptions in the forum but got no response. Here's a test page I am using plus the global.asax. When you click DirectEvent, you will see that the error is handled in global.asax page. When you click DirectMethod, I can catch it with a javascript function but I would like to handle that globally on the serverside instead so I can log it to database.

    ErrorHandling.aspx
    
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">

    [DirectMethod()]
    public static void GoDirectMethod() {
        throw new Exception("GoDirectMethod");
    }

    public void GoDirectEvent(object sender, DirectEventArgs args) {
        throw new Exception("GoDirectEvent");
    }
    
</script>

<!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></title>
</head>
<body>

    <script type="text/javascript">
        function onError(response, result, el, eventType, action, extraParams, o) {
            if (eventType === 'event') {
                //ajax event already has its own error handler
                return;
            }

            Ext.Msg.alert('Error', result.errorMessage);

            // return false will stop event from bubbling
            return false;
        }
    </script>

    <form id="form1" runat="server">
    <ext:ResourceManager runat="server" RethrowAjaxExceptions="true">
        <Listeners>
            <AjaxRequestException Fn="onError" />
        </Listeners>
    </ext:ResourceManager>
    <div style="padding: 10px">
        <ext:Button runat="server" Text="DirectMethod">
            <Listeners>
                <Click Handler="Ext.net.DirectMethods.GoDirectMethod();" />
            </Listeners>
        </ext:Button>
        <ext:Button runat="server" Text="DirectEvent">
            <DirectEvents>
                <Click OnEvent="GoDirectEvent">
                </Click>
            </DirectEvents>
        </ext:Button>
    </div>
    </form>
</body>
</html>
    Global.asax
    using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;

namespace MyExtNetSandbox {
    public class Global : System.Web.HttpApplication {
     
        protected void Application_Error(object sender, EventArgs e) {
            //log error to database

            //clear error
            HttpContext.Current.Server.ClearError();

            //send custom response
            var r = HttpContext.Current.Response;
            r.ClearContent();
            r.StatusCode = 500;           
            r.Write("Handled in Global.asax.  Print out friendly message.");
            r.Flush();
            r.End();

        }
     
    }
}
  4. #4
    Jul 21, 2010, 11:09 PM
    Hi,

    Yes, for static methods that property doesn't work because page instance is not created and we cannot read that property.
    I have to think how we can define rethrowing exception for static direct method (may be through DirectMethod attribute)
  5. #5
    Jul 22, 2010, 9:13 PM
    Hi,

    We have implemented that functionality. Now toy can add
    RethrowException = true
    to the DirectMethod attribute and exception will be rethrowing

    [DirectMethod(RethrowException = true)]
  6. #6
    Jul 27, 2010, 5:59 PM
    Is there a way to globally set this instead of per DirectMethod? Thanks!
  7. #7
    Jul 27, 2010, 7:59 PM
    nevermind, i am fine with handling static directmethods on a case by case basis. Thanks!

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