C#: Calling method in another thread

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How to update GUI from another thread in C#?

Following scenario: I have a class with some GUI elements (winforms). This class has a update method which changes things on the controls. I also have a FileSystemWatcher. This object gives me a callback whenever a file changes. In that case I call the update method.

As you might guess this makes the application crash. The reason: the callback from the FileSystemWatcher is in another thread that the one that created the controls. If I then call the update method it can't access the controls.

What is the way to fix this? Thanks!

It is trivial for FSW, assign the SynchronizingObject property. — Hans Passant, Sep 25 '11 at 13:37

score 1 · Accepted Answer · answered Sep 25 '11 at 13:19

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You should call Control.Invoke or BeginInvoke, see in-depth reference Here

answered Sep 25 '11 at 13:19

Amittai Shapira

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score 0 · Answer 2 · edited May 23 '17 at 12:31

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The top voted answer this this Question looks like it might do the trick:

C# Windows Forms Application - Updating GUI from another thread AND class?

edited May 23 '17 at 12:31

Community

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answered Sep 25 '11 at 13:20

Russ Clarke

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C#: Calling method in another thread

2 Answers2