How to override window show operation?

Question

I have a class derived from window to show message to user. The problem is in some places in my application it is throwing an exception saying

The calling thread must be STA, because many UI components require this.

I came to know i need to introduce the Dispatcher to invoke the messagebox to get rid of the error. Since the messagebox is used in numerous locations the fastest fix i can think about is to override the show and showwindow and create and display the message box from there.

Please tell me how can i override the Show and ShowWindow events of a wpf window

You can't. It isn't marked virtual... Maybe someone will have an alternative for you tho. — Merlyn Morgan-Graham, Sep 30 '11 at 11:48
This link to a similar question might help: http://stackoverflow.com/questions/2378016/how-to-run-something-in-the-sta-thread — DJ Quimby, Sep 30 '11 at 11:50
Is it possible to set the ApartmentState.STA in the constructor of the window class? — logeeks, Sep 30 '11 at 12:01

score 1 · Accepted Answer · answered Sep 30 '11 at 12:10

I would make a static utility class that has a method (and maybe some overloads) to show this form for you. A bit like MessageBox in Windows.Forms. Within that class you can code anything that is required to show the window properly without ever having to repeat yourself.

How to override window show operation?

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