It looks to me like the C1FlexGrid has a bug where they will not enter edit mode if they are within a FocusScope that is not the Window (i.e. not the main focusscope) - likely they are checking if they are the focused element of the window instead of checking if they are the focusedelement of the containing focusscope. In xamDockManager each ContentPane is a separate focus scope because each maintains its own logically focused element. You'll notice that if you turn that off on the ContentPane that the C1FlexGrid will enter edit mode (e.g. "FocusManager.SetIsFocusScope(contentPane, false)"). I would recommend that you report this issue to them. You can get the same behavior if you were to put their grid within another focusscope (e.g. toolbar, menu, ribbon) or even define your own.

e.g.

    Type T = atett.GetType("WpfControlLibrary1.UserControl1");
    var obj = Activator.CreateInstance(T) as Control;

    var cc = new ContentControl { Content = obj };
    FocusManager.SetIsFocusScope(cc, true);
    Window window = new Window();
    window.Content = cc;
    window.Show();

Hello,

Thank you for your reply.

I have attacted a sample project. There are two buttons in MainWindow.xaml.

If you click the window button, you can edit the "first" field data in the grid.

But, if you click the Floating button, you can't edit the "first" field data in the grid.

Thank you.