Save/Load DockLayout BUG

[santoxyz]

Sometimes, when you dockControl.Save(); your current layout (i.e. you have two left side panels one on top of the other) the saved XAML contains some unexpected ShowAsFloatingAction members.

When you subsequently try to dockControl.Load() your saved layout a debug assert is thrown from DockManager.WindowHandler.cs:

private void InitNativeStrategy()
{
Debug.Assert(DockControl.FloatingWindows.Count == 0);
DockControl.FloatingWindows.CollectionChanged += new NotifyCollectionChangedEventHandler(OnFloatingWindowsChanged);
}

If you ignore it and continue, whenever you try to change the dockitems layout moving around panels, the app crashes with a NullReferenceExeption:

private void ShowOverlayWindow()
{
_overlayWindow = OverlayWindow.Show(DockControl);
SetStartMousePosition(_overlayWindow, _overlayWindow.PointFromScreen(_startMousePoint));
foreach (FloatingWindow floatingWindow in DockControl.FloatingWindows)
{
NativeFloatingWindow nativeWindow = NativeFloatingWindow.GetNativeFloatingWindow(floatingWindow); //NativeFloatingWindow is null
SetStartMousePosition(nativeWindow, nativeWindow.PointFromScreen(_startMousePoint));
}
}

Anybody knows how to solve this?

[jrosalesmeza]

Hello, to solve the error I just add a Try in the next part of the library, exactly where you are located in the file: DevZest.Windows.Docking.Primitives, of the following method. However, I don't think it is the best solution.