Re: Windows service failed to start. - C# Discussion Boards

18-Jun-10 1:16

18-Jun-10 1:16

Message Closed

modified 23-Nov-14 6:20am.

Anil Veeraghattapu 418-Jun-10 1:20

18-Jun-10 1:20

alright.
lemme try and get back to you.

Anil Veeraghattapu 418-Jun-10 1:28

18-Jun-10 1:28

yes i put all the code of the Onstart event in try catch block. its no use.
i am getting the same error message when i tried to start the service from the service explorer

thanks
Anil Veeraghattapu.

18-Jun-10 1:30

18-Jun-10 1:30

Message Closed

modified 23-Nov-14 6:19am.

Anil Veeraghattapu 418-Jun-10 2:32

18-Jun-10 2:32

Thanks
i find the exception in the text file.
you did a great help.
the problem is it was a fromat exception throw by a log control when i tried to log somethin in the on start event

Thanks
Anil Veeraghattapu.

Dave Kreskowiak18-Jun-10 2:06

Dave Kreskowiak

18-Jun-10 2:06

Anil Veeraghattapu 4 wrote:
i put all the code of the Onstart event

There is your problem.

The general layout of a Service is, in OnStart, you are expected to start a seperate thread that handles your main service code loop, such a listeners or some kind of polling loop, ... This releases OnStart and returns control back to the Service Control Manager.

In OnStop, you shutdown this loop as appropriate and let the thread stop gracefully.

Putting all of your code in OnStart gives you exactly the error message your getting because OnStart never returns control back to the SCM within the default 30 seconds the SCM expects OnStart to return.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

#realJSOP18-Jun-10 1:28

#realJSOP

18-Jun-10 1:28

Have you run it under the debugger yet?

.45 ACP - because shooting twice is just silly
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Anil Veeraghattapu 418-Jun-10 1:33

18-Jun-10 1:33

the service a'nt got started my friend.
i am unable to attach it to debugger.

Thanks
Anil Veeraghattapu.

#realJSOP18-Jun-10 11:20

#realJSOP

18-Jun-10 11:20

Wrong. Put a breakpoint at the top of the Start)( method.

Gonzalo Cao18-Jun-10 1:43

Gonzalo Cao

18-Jun-10 1:43

In the event log you can see further information, if there's an exception you will be able to see it there as well.

Anil Veeraghattapu 418-Jun-10 2:35

18-Jun-10 2:35

Yes
you are right.
it was some format exception
i find it in the event log too.
Thanks for your help

Thanks
Anil veeraghattapu.

how to destroy window handle

R. Giskard Reventlov18-Jun-10 2:31

R. Giskard Reventlov

18-Jun-10 2:31

You can debug services using the AndersonImes.ServiceProcess dll which works really well. Had a quick look but can't find it so you may have to contact[^] him directly: well worth having in your toolkit.

me, me, me

"The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!"
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KaurGurpreet17-Jun-10 22:54

KaurGurpreet

17-Jun-10 22:54

I have a user control (composed of 10 text boxes).

on certain user inputs -> multiple rows of above user control are added to a form.

After certain amount of operation, I start getting error - cannot create window handle.

How do I need to clear window handle? Shouldn't it be automatically disposed?

Gurpreet

17-Jun-10 23:12

Re: how to destroy window handle

17-Jun-10 23:12

Message Closed

modified 23-Nov-14 6:20am.

KaurGurpreet17-Jun-10 23:21

KaurGurpreet

17-Jun-10 23:21

I do not want to show them all at once. At a time say 100 are visible but after the user changes the input I need to show other 100. But how do a ensure that the handle is destroyed for previous ones?

Gurpreet

Re: how to destroy window handle

Luc Pattyn18-Jun-10 1:22

Luc Pattyn

18-Jun-10 1:22

So you have 100 visible UserControls with 10 TextBoxes each, and a lot of invisible ones?
That is a bad design. If you need that many user inputs, use a listing control, maybe a DataGridView.

Smile | :)

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Re: how to destroy window handle

Dave Kreskowiak18-Jun-10 2:03

Dave Kreskowiak

18-Jun-10 2:03

KaurGurpreet wrote:
How do I need to clear window handle?

You don't. That's handled by the controls themselves.

If you're running into this problem, it could be that your Showing a form with ShowDialog (not Show!), but never Disposing it when you're done. Just because you can't see the form anymore doesn't mean it's gone. If you don't Dispose the form, you're leaking resources (handles). This issue does not come up if the form is shown with the Show method.

If you're putting up hundreds and hundreds of controls, your design is the problem, not the window handles being released.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

List all users of computer

Sunil G17-Jun-10 22:53

Sunil G

17-Jun-10 22:53

Hi All,

I want to retrieve all the users of a computer which is in network in my C# application.

Any idea?

Regards,
Sunil G.

17-Jun-10 23:07