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Illegal cross-thread operation:

Illegal cross-thread operation: Control 'PopupInfo' accessed from a thread
other than the thread it was created on.

Can I track this down using the debugger?

Thanks.
Nov 17 '05 #1
4 4441
oran johnson <or*****@optonl ine.net> wrote:
Illegal cross-thread operation: Control 'PopupInfo' accessed from a thread
other than the thread it was created on.

Can I track this down using the debugger?


Well, you shouldn't have too many bits of code accessing a control
anyway - it should be fairly simple to find the bit which is doing it
from the wrong thread.

The above looks like the message from an exception though - why not
just change your exception handling to print out the whole stack trace
rather than just the message?

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Nov 17 '05 #2
You can't access a control property from one thread that was created on
another.

Create a delegate that is invoked from your new thread but handled on your
main thread. Inside the delegate handler, make the UI changes your require.

"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...
oran johnson <or*****@optonl ine.net> wrote:
Illegal cross-thread operation: Control 'PopupInfo' accessed from a
thread
other than the thread it was created on.

Can I track this down using the debugger?


Well, you shouldn't have too many bits of code accessing a control
anyway - it should be fairly simple to find the bit which is doing it
from the wrong thread.

The above looks like the message from an exception though - why not
just change your exception handling to print out the whole stack trace
rather than just the message?

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

Nov 17 '05 #3
I would just look at your code for the threads, the figure out which is
accessing "PopupInfo" .

You need to setup delegate(s) if you want to access the control from another
thread.

"oran johnson" <or*****@optonl ine.net> wrote in message
news:1d******** *************** *******@40tude. net...
Illegal cross-thread operation: Control 'PopupInfo' accessed from a thread
other than the thread it was created on.

Can I track this down using the debugger?

Thanks.

Nov 17 '05 #4
Hi,

It should be easy, it's a method that access PopupInfo that that is used
from a thread, see what methods you are using to run threads and start from
there, also do as Jon said.

Note that if you do the same thing ( updating a control from a worker
thread) from more than one point you need to change them all. so even if you
know the s ourc of the current problem you potentialy have more problems
somewhere else.
cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"oran johnson" <or*****@optonl ine.net> wrote in message
news:1d******** *************** *******@40tude. net...
Illegal cross-thread operation: Control 'PopupInfo' accessed from a thread
other than the thread it was created on.

Can I track this down using the debugger?

Thanks.

Nov 17 '05 #5

This thread has been closed and replies have been disabled. Please start a new discussion.

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