Borderless window application takes up more space than my screen resolution

Question

I have created a borderless application in WPF, and it works pretty good. However, when I set the WindowState to full screen, the application takes up more space than my scr

Answer 1

I needed this to work across different size displays (like most people it sounds). So I simply did this...

<Window x:Class="MyApp.MainWindow"
    ResizeMode="CanResize" 
    WindowStyle="SingleBorderWindow"
    SizeChanged="Window_SizeChanged">
....
Code
....
</Window>


public void Window_SizeChanged(object sender, SizeChangedEventArgs e)
    {
        if (this.WindowState == WindowState.Maximized)
        {
            this.BorderThickness = new System.Windows.Thickness(8);
        }
        else
        {
            this.BorderThickness = new System.Windows.Thickness(0);
        }
    }

Answer 2

I use a trigger on the window:

<Style.Triggers>
    <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self},Path=WindowState}" Value="{x:Static WindowState.Maximized}">
        <Setter Property="BorderThickness" Value="8"/>
    </DataTrigger>
</Style.Triggers>

this trigger create a Border when the windowstate is Maximized. I think it's useful.

Answer 3

In Xaml set the following binding on the Window.MaxHeight:

MaxHeight="{DynamicResource {x:Static SystemParameters.MaximizedPrimaryScreenHeightKey}}"

No need for an additional utility class.

Answer 4

I found this great solution

<Window WindowStyle="None" WindowStartupLocation="CenterScreen" WindowState="Maximized"
        MaxWidth="{Binding Source={x:Static SystemParameters.WorkArea}, Path=Width}"
        MaxHeight="{Binding Source={x:Static SystemParameters.WorkArea}, Path=Height}"
    >
...
</Window>

But error for me still persists, windows is offset by few pixels on top and left... I tried to set Left and Top to 0 after I change window state but nothing happens.

Answer 5

A newer feature of .NET has solved this problem. Leave your WindowStyle="SingleBorderWindow" or "ThreeDBorderWindow" Leave ResizeMode="CanResize", then add this to the xaml inside the

<Window>
    <WindowChrome.WindowChrome>
        <WindowChrome GlassFrameThickness="0" CornerRadius="0" CaptionHeight="0" 
            UseAeroCaptionButtons="False" ResizeBorderThickness="7" />
    </WindowChrome.WindowChrome>
</Window>

The window will not have any of the default window pane, but will still allow resizing and will not cover the task bar when maximized.

Answer 6

Try this

Width="{Binding Source={x:Static SystemParameters.WorkArea}, Path=Width}"
Height="{Binding Source={x:Static SystemParameters.WorkArea}, Path=Height}"