Config GUI: CA cert file chooser freezes the window

[bpintea]

Pressing the "Browse.." button to open the file chooser will make the window unresponsive.
Likely connected to the threading apart. model.

[codebrain]

Correct.

The binding DLL needs to ensure that the form is created with a single threaded apartment model. The Open File dialog and the Trace File dialogs both rely on using a message pump loop in an STAThread.

https://docs.microsoft.com/en-us/dotnet/api/system.stathreadattribute?redirectedfrom=MSDN&view=netframework-4.7.2

Apparently if the thread is in a multi threaded apartment that is where you see the problem of the crashing dialog window.

So, how to fix? I remember you mentioned that you decorated the "main()" entry point into the form with the [STAThread] attribute and that didnt work - it might be worth looking into the binding C++ files to see if you can create the .NET call in an STAThread.

Failing that I can attempt to create another thread within the C# as an STAThread and attempt to run that...

[bpintea]

Fixed by bpintea@542bfff.

[bpintea]

The current solution doesn't work if client application invoking the GUI had set already the threading model (to presumably MTA).