prevent windows form from "hang"

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Julia - 09 Mar 2006 09:05 GMT

Hi,
Iam developing an application using windows forms as the gui. The
application is doing some heavy database work. While this work is done (I use
separate threads for this) I would like to print some information in the gui
but I dont know how to do, because it seems like the gui is locked? What can
I do to make this work?

Thanks
Julia

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Stoitcho Goutsev (100) - 09 Mar 2006 14:32 GMT

Julia,

You can't modify the GUI from a worker thread. That has been asked many
times. You need to marshal the execution to the GUI thread and make the
modifications there; to do that you need to use Control.InvoleRequired and
Contro.Invoke memebers.

For more info:
http://msdn2.microsoft.com/en-us/library/ms171728.aspx

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HTH
Stoitcho Goutsev (100)

> Hi,
> Iam developing an application using windows forms as the gui. The
[quoted text clipped - 8 lines]
> Thanks
> Julia

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Bob Powell [MVP] - 09 Mar 2006 18:43 GMT

In addition to Stoitcho's suggestion you can use the same method to invoke a
method in your gui thread that just calls Application.DoEvents().

You could even run this call from a System.Timers.Timer that is running
while your other worker-thread is getting the database info. Invoke would
still be necessary though in either case.

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Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

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> Hi,
> Iam developing an application using windows forms as the gui. The
[quoted text clipped - 8 lines]
> Thanks
> Julia

Reply to this Message

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prevent windows form from "hang"

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