Trapping Exceptions in Forms apps

In ASP.Net applications we are able to trap exceptions in the
Application_Error Event in the Global.asax with the following code...
System.Exception myException = new Server.GetLastError().InnerException.

Where do I trap this in a Forms Application?

--
Regards,
Gary Blakely

Mattias
Wed Apr 25 13:17:36 CDT 2007

>Where do I trap this in a Forms Application?

You can handle the Application.ThreadException event.


Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

bryan
Wed Apr 25 13:40:09 CDT 2007

Like this (before your Application.Run)

Application.ThreadException += new
System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
AppDomain.CurrentDomain.UnhandledException += new
UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);



"GaryDean" <GaryDean@newsgroups.nospam> wrote in message
news:O0GDIU2hHHA.3448@TK2MSFTNGP03.phx.gbl...
> In ASP.Net applications we are able to trap exceptions in the
> Application_Error Event in the Global.asax with the following code...
> System.Exception myException = new Server.GetLastError().InnerException.
>
> Where do I trap this in a Forms Application?
>
> --
> Regards,
> Gary Blakely
>
>

v-lliu
Wed Apr 25 22:40:36 CDT 2007

Hi Gary,

I agree to what Mattias and Gary have suggested.

In addition, if you're using VS05 and VB.NET, you could also handle the
UnhandledException event of the application when the application framework
is enabled.

To do this, right-click the project in the Solution Explorer and choose
Properties. In the Project Designer, switch to the 'Application' tab.
Ensure the checkbox before the 'Enable application framework' option is
selected. Click the 'View Application Events' button and the
ApplicationEvents.vb file will be created and opened.

Then select '(MyApplication Events)' from the top left combobox, and then
select 'UnhandledException' from the top right combobox. An event handler
for the UnhandledException will be created automatically.

Hope this helps.
If you have any question, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support

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GaryDean
Thu Apr 26 18:29:33 CDT 2007

Unfortunately I'm using C#.


--
Regards,
Gary Blakely
"Linda Liu [MSFT]" <v-lliu@online.microsoft.com> wrote in message
news:42cDwS7hHHA.5272@TK2MSFTNGHUB02.phx.gbl...
> Hi Gary,
>
> I agree to what Mattias and Gary have suggested.
>
> In addition, if you're using VS05 and VB.NET, you could also handle the
> UnhandledException event of the application when the application framework
> is enabled.
>
> To do this, right-click the project in the Solution Explorer and choose
> Properties. In the Project Designer, switch to the 'Application' tab.
> Ensure the checkbox before the 'Enable application framework' option is
> selected. Click the 'View Application Events' button and the
> ApplicationEvents.vb file will be created and opened.
>
> Then select '(MyApplication Events)' from the top left combobox, and then
> select 'UnhandledException' from the top right combobox. An event handler
> for the UnhandledException will be created automatically.
>
> Hope this helps.
> If you have any question, please feel free to let me know.
>
> Sincerely,
> Linda Liu
> Microsoft Online Community Support
>
> ==================================================
> Get notification to my posts through email? Please refer to
> http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
> ications.
>
> Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
> where an initial response from the community or a Microsoft Support
> Engineer within 1 business day is acceptable. Please note that each follow
> up response may take approximately 2 business days as the support
> professional working with you may need further investigation to reach the
> most efficient resolution. The offering is not appropriate for situations
> that require urgent, real-time or phone-based interactions or complex
> project analysis and dump analysis issues. Issues of this nature are best
> handled working with a dedicated Microsoft Support Engineer by contacting
> Microsoft Customer Support Services (CSS) at
> http://msdn.microsoft.com/subscriptions/support/default.aspx.
> ==================================================
>
> This posting is provided "AS IS" with no warranties, and confers no
> rights.
>

GaryDean
Thu Apr 26 18:54:04 CDT 2007

Before my Application Run? where is that? Initializecomponent?
(haven't done forms apps in a while)

--
Regards,
Gary Blakely
"bryan" <bryandonaldson@mindspring.com> wrote in message
news:uSeKOi2hHHA.4844@TK2MSFTNGP02.phx.gbl...
> Like this (before your Application.Run)
>
> Application.ThreadException += new
> System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
> AppDomain.CurrentDomain.UnhandledException += new
> UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
>
>
>
> "GaryDean" <GaryDean@newsgroups.nospam> wrote in message
> news:O0GDIU2hHHA.3448@TK2MSFTNGP03.phx.gbl...
>> In ASP.Net applications we are able to trap exceptions in the
>> Application_Error Event in the Global.asax with the following code...
>> System.Exception myException = new Server.GetLastError().InnerException.
>>
>> Where do I trap this in a Forms Application?
>>
>> --
>> Regards,
>> Gary Blakely
>>
>>
>
>

v-lliu
Fri Apr 27 07:19:51 CDT 2007

Hi Gary,

Bryan means that you hook up the ThreadException and UnhandledException
events before the code 'Application.Run(new mainform())' in the static Main
method.

Sincerely,
Linda Liu
Microsoft Online Community Support

GaryDean
Fri Apr 27 10:48:14 CDT 2007

But if I put the subscribe code in Program.cs, Main method
Application_ThreadException is an undefined variable because that method is
in form1 and it has to be in Form1 because it references all sorts of
variables in that scope

--
Regards,
Gary Blakely
"Linda Liu [MSFT]" <v-lliu@online.microsoft.com> wrote in message
news:bvh2kZMiHHA.5272@TK2MSFTNGHUB02.phx.gbl...
> Hi Gary,
>
> Bryan means that you hook up the ThreadException and UnhandledException
> events before the code 'Application.Run(new mainform())' in the static
> Main
> method.
>
> Sincerely,
> Linda Liu
> Microsoft Online Community Support
>

v-lliu
Fri Apr 27 22:38:30 CDT 2007

Hi Gary,

In fact, it doesn't matter where you hook up the ThreadException and
UnhandledException events and handle them.

You could put the subscribe code in the static Main method within the
Program.cs file, as well as in the constructor of the main form.

I mean if you have to put the ThreadException and UnhandledException event
handlers in the Form1, you could put the subscribe code in the Form1's
constructor.

If you have anything unclear, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support