Make WPF Application Fullscreen (Cover startmenu)

Question

I would like to make my WPF application fullscreen. Right now the start menu prevents it from covering everything and shifts my application up. This is what I have for my MainWindow.xaml code:

<Window x:Class="HTA.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    mc:Ignorable="d" 
    WindowStyle="None" ResizeMode="NoResize"
    WindowStartupLocation="CenterScreen" 
    Width="1024" Height="768">

score 154 · Accepted Answer · edited May 07 '14 at 17:54

You're probably missing the WindowState="Maximized", try the following:

<Window x:Class="HTA.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525"
    WindowStyle="None" ResizeMode="NoResize"  
    WindowStartupLocation="CenterScreen" WindowState="Maximized">

score 8 · Answer 2 · edited Oct 17 '16 at 17:24

8

<Window x:Class="HTA.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    mc:Ignorable="d" 
    ResizeMode="NoResize"
    WindowStartupLocation="CenterScreen" 
    Width="1024" Height="768"
    WindowState="Maximized" WindowStyle="None">

Window state to Maximized and window style to None

edited Oct 17 '16 at 17:24

xmedeko

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answered Oct 27 '15 at 17:00

Jeba Ranganathan

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score 3 · Answer 3 · edited May 07 '14 at 17:54

3

You can also do it at run time as follows :

Assign name to the window (x:Name = "HomePage")
In constructor just set WindowState property to Maximized as follows

HomePage.WindowState = WindowState.Maximized;

edited May 07 '14 at 17:54

GEOCHET

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answered Apr 09 '13 at 07:15

Chetan S

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8

Should not use the codebehind for properties which can be set in xaml. – Peter van Kekem Apr 29 '13 at 14:06
2

@PetervanKekem This is pretty useful when the window is not maximized by default but rather gets maximized when user wants it to be by clicking a button, etc. – SepehrM Sep 30 '14 at 12:56
True, but in the answer it is set in the constructor. (When using the MVVM pattern, you should use the ViewModel class for this, and bind the WindowState to the property) – Peter van Kekem Sep 30 '14 at 14:02

score 3 · Answer 4 · answered Dec 16 '16 at 09:39

window.WindowStyle = WindowStyle.None;
window.ResizeMode = ResizeMode.NoResize;
window.Left = 0;
window.Top = 0;
window.Width = SystemParameters.VirtualScreenWidth;
window.Height = SystemParameters.VirtualScreenHeight;
window.Topmost = true;

Works with multiple screens

score 2 · Answer 5 · answered May 02 '18 at 17:47

2

When you're doing it by code the trick is to call

WindowStyle = WindowStyle.None;

first and then

WindowState = WindowState.Maximized;

to get it to display over the Taskbar.

answered May 02 '18 at 17:47

kabinx

35
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This is thre trick when toggeling between full screen and non full screen in code – unkreativ Mar 26 '19 at 13:38

SavageStyle · Answer 6 · 2018-06-25T09:47:35.153

If you want user to change between WindowStyle.SingleBorderWindow and WindowStyle.None at runtime you can bring this at code behind:

Make application fullscreen:

RootWindow.Visibility = Visibility.Collapsed;
RootWindow.WindowStyle = WindowStyle.None;
RootWindow.ResizeMode = ResizeMode.NoResize;
RootWindow.WindowState = WindowState.Maximized;
RootWindow.Topmost = true;
RootWindow.Visibility = Visibility.Visible;

Return to single border style:

RootWindow.WindowStyle = WindowStyle.SingleBorderWindow;
RootWindow.ResizeMode = ResizeMode.CanResize;
RootWindow.Topmost = false;

Note that without RootWindow.Visibility property your window will not cover start menu, however you can skip this step if you making application fullscreen once at startup.

Make WPF Application Fullscreen (Cover startmenu)

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