prevent windows form from "hang"

[Guest]

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

 

[Stoitcho Goutsev \(100\)]

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

 

[Bob Powell [MVP]]

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.


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

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

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