horizontally center vertically maximized WPF window

Question

I have a WPF window that has a MaxWidth set, so when I hit the Maximize button, it maximizes vertically but not horizontally. This is expected behavior. However, the window always docks to the left side of the screen (Windows 7, if that matters) and I want it to be centered horizontally when Maximized. I tried adding the following StateChanged event handler, but it doesn't seem to do anything:

private void wdw_mainWindow_StateChanged(object sender, EventArgs e)
{
    switch (WindowState)
    {
        case WindowState.Maximized:
            var windowWidth = (double)GetValue(WidthProperty);
            Left = (SystemParameters.PrimaryScreenWidth / 2) - (windowWidth / 2);
            break;
    }
}

I set a breakpoint on the switch statement and this code definitely gets hit when I hit the Maximize button in my app. However, even after Left gets set, the window remains firmly stuck to the left side of the screen. What's going on?

Answer 1

Aero Snap on Windows 7 is probably interfering with your attempt to center the window. Try turning off Aero Snap and see if you still have the problem.

http://www.sevenforums.com/tutorials/3069-aero-snap-turn-off.html

Answer 2

Register to location changed also, and when both events occurs exec the logic, It'll do the trick.