Wpf Window resizes when computer is locked.

Question

I have a Window set to the height and width of my monitors:

var r = System.Drawing.Rectangle.Union( System.Windows.Forms.Screen.AllScreens[0].Bounds, System.Windows.Forms.Screen.AllScreens[1].Bounds );
Height = r.Height;
Width = r.Width;

This is all fine until I Lock my computer (WIN+L), when I come back the window has resized itself to be on one monitor only.

What I want to do is prevent the decrease in size, as I'm drawing on a canvas on the second monitor, and when the resize occurs, this is all lost..

Any thoughts on how I can prevent this?

Cheers!

Answer 1

You can use the Unlock/Lock event in .NET. Store your window height, width and position during the lock event and restore it on an Unlock event. Make sure you add "using Microsoft.Win32"

SystemEvents.SessionSwitch += new SessionSwitchEventHandler(SystemEvents_SessionSwitch);

private void SystemEvents_SessionSwitch(object sender, SessionSwitchEventArgs e)
{
    if (e.Reason == SessionSwitchReason.SessionUnlock)
    {
        //Put resize logic here
    }
    else if (e.Reason == SessionSwitchReason.SessionLock)
    {
        //Put size store logic here
    }
}