OpenFileDialog returns null if more than ~12 files are selected

Platform: Windows 10, Avalonia 0.6.1

Hello! Given an OpenFileDialog initialized with AllowMultiple:

OpenFileDialog ofd = new OpenFileDialog(); 
ofd.AllowMultiple = true; 
 
string[] files = await ofd.ShowAsync(VisualRoot as Window); 

The OpenFileDialog returns null when selecting more than ~12 files, which is very limiting.

I don’t know much about the Windows API, but looking at SystemDialogImpl, this is probably coming from the 256 chars buffer. On Linux/Gtk3, the issue did not appear or the limit is bigger.

Maybe with AllowMultiple this buffer should be made far larger, or the API could expose this as a property?

[plule]

@CommonGuy Thank you for the fix!

[plule]

You’re right that’s the way to go, I also did not read well your first link that also dynamically resize the buffer.