Thread-Safe Forms (MDI Childs)

  • Thread starter Thread starter Frank Uray
  • Start date Start date
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Frank Uray

Hi all

Got a problem with thread-safety:
I have a frm_main witch is a mdi-container.
I am trying to show mdi-child form from another
thread and get of corse an exeption:
"Controls created on one thread cannot be parented to a
control on a different thread."
How do I do this in the right way??

Thanks for any help!

Frank Uray
 
Frank Uray said:
Got a problem with thread-safety:
I have a frm_main witch is a mdi-container.
I am trying to show mdi-child form from another
thread and get of corse an exeption:
"Controls created on one thread cannot be parented to a
control on a different thread."
How do I do this in the right way??
Click to expand...

You must show the forms in the main UI thread. You can access the
controls/forms with invoking:

<http://www.devx.com/dotnet/Article/11358>
 
Thanks for the answer!

I dont need to access controls on the main form,
i just like to show the form as mdi-child.

On the click event in the main form i start
a thread witch is then showing a form as mdi-child,
this would be the goal...

Any ideas?

Best regards
Frank
 
Frank Uray said:
I dont need to access controls on the main form,
i just like to show the form as mdi-child.

On the click event in the main form i start
a thread witch is then showing a form as mdi-child,
this would be the goal...
Click to expand...

Then you must tell the main GUI thread to create the MDI form. You
cannot create the form from within the 2nd thread. I remember I posted
a link that describes how to do that.
 
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