Question

I am using the code below to save and restore the window position and size upon restart.

I am observing an upward drift of 28 pixels everytime I execute this code!

Am I reading the wrong values, or am I restoring them incorrectly? Where is the number 28 (size of the chrome?) coming from (and how would I account for it programmatically, rather than a fixed number in code)?

Here is my code:

public partial class MainStudioWindowControl : RibbonWindow {     public MainStudioWindowControl()     {         App.MainWindowOwner = this;         this.Loaded += new System.Windows.RoutedEventHandler(MainStudioWindowControl_Loaded);     }      void MainStudioWindowControl_Loaded(object sender, System.Windows.RoutedEventArgs e)     {         System.Windows.Window mainWindow = System.Windows.Application.Current.MainWindow;         mainWindow.WindowStartupLocation = System.Windows.WindowStartupLocation.Manual;         if (Studio.Properties.Settings.Default.Width > 0)         {             mainWindow.Left = Studio.Properties.Settings.Default.Left;             mainWindow.Top = Studio.Properties.Settings.Default.Top;             mainWindow.Width = Studio.Properties.Settings.Default.Width;             mainWindow.Height = Studio.Properties.Settings.Default.Height;         }         Debug.WriteLine(string.Format('Loading: Top = {0}', this.Top));     }      protected override void OnClosing(System.ComponentModel.CancelEventArgs e)     {         base.OnClosing(e);         System.Windows.Window mainWindow = System.Windows.Application.Current.MainWindow;         Studio.Properties.Settings.Default.Left = mainWindow.Left;         Studio.Properties.Settings.Default.Top = mainWindow.Top;         Studio.Properties.Settings.Default.Width = mainWindow.Width;         Studio.Properties.Settings.Default.Height = mainWindow.Height;         Studio.Properties.Settings.Default.Save();         Debug.WriteLine(string.Format('Saving: Settings.Top = {0}', Studio.Properties.Settings.Default.Top));     } } 

Answer 1

Try this:

1) Derive your class from the normal Window, not the RibbonWindow – if that fixes it, it’s a RibbonWindow issue.

2) Use hard-coded values to set the measurments in the Loaded handler – if that fixes it, the problem’s got something to do with the settings.

With these two changes, it worked fine for me. The window appeared where it should every time.