Borderless application on maximize is hiding behind the task bar in Win 7 and Win 8

Question

I have created a borderless window in WPF. I have written a event to maximize the window but on maximizing, part of the window sometimes hides behind the task bar and after a moment appears on top of the task bar.

How can I ensure that the window remains on top of task bar every time ? Following is the way I have implemented:

private void OnMaximizedClicked(object sender, RoutedEventArgs e)
{
    this.WindowState = this.WindowState != WindowState.Normal ? WindowState.Normal : WindowState.Maximized;
}

I have tried setting the TopMost property to true, but didn't help me either.

I am creating a stackpanel on the grid, adding three buttons, min, max and close. In other words creating my own title bar. — Rakesh Reddy, Jul 29 '12 at 19:10
It's called "borderless window". I don't repro this behavior. — Hans Passant, Jul 29 '12 at 19:18
On continuous maximizing and restoring the window, I can see this behaviour. Properties which I have set is : WindowStyle="None" ResizeMode="NoResize" — Rakesh Reddy, Jul 29 '12 at 19:25
I have a similar issue, but it does go away with Topmost. If Topmost remains true, the taskbar doesn't appear in front of the window. — Kendall Frey, Dec 27 '14 at 01:14

score 1 · Answer 1 · edited May 23 '17 at 11:43

1

This will fix it, but I feel there should be a more elegant way:

this.WindowStyle = System.Windows.WindowStyle.SingleBorderWindow;
this.WindowState = this.WindowState != WindowState.Normal 
                 ? WindowState.Normal : WindowState.Maximized;
this.WindowStyle = System.Windows.WindowStyle.None;

Btw, I adapted it from this WinForms answer. So it's not WPF related and you can throw a wider search net.

edited May 23 '17 at 11:43

Community

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answered Jul 29 '12 at 19:34

H H

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When I set the WindowStyle after maximizing, the window overflows the screen by about 8 pixels (appears to be on all sides), rather than maximizing properly. – Kendall Frey Dec 27 '14 at 01:11

score 0 · Answer 2 · answered Jun 01 '15 at 13:42

0

Setting ResizeMode to NoResize helped on my case:

ResizeMode="NoResize"

answered Jun 01 '15 at 13:42

Panu Oksala

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Borderless application on maximize is hiding behind the task bar in Win 7 and Win 8

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