How to Get the Size of the Current Screen in Wpf

How to get the size of the current screen in WPF?

As far as I know there is no native WPF function to get dimensions of the current monitor. Instead you could PInvoke native multiple display monitors functions, wrap them in managed class and expose all properties you need to consume them from XAML.

How to get real value of Screen Size in C# WPF Application

You can monitor the SystemEvents for changes.

using Microsoft.Win32;

Add this to your constructor or the like:

SystemEvents.DisplaySettingsChanged += 
    new EventHandler(SystemEvents_DisplaySettingsChanged);

Here's the event handler. I have the data bound to 2 TextBoxes so I could see the values change as I messed with the resolution, including telling it to revert.

  void SystemEvents_DisplaySettingsChanged(object sender, EventArgs e)
  {
     data.ScreenHeight = Screen.PrimaryScreen.Bounds.Height;
     data.ScreenWidth = Screen.PrimaryScreen.Bounds.Width;
  }

In your case, just change the assignment to point to where you want to store it.

How can I get the active screen dimensions?

Screen.FromControl, Screen.FromPoint and Screen.FromRectangle should help you with this. For example in WinForms it would be:

class MyForm : Form
{
  public Rectangle GetScreen()
  {
    return Screen.FromControl(this).Bounds;
  }
}

I don't know of an equivalent call for WPF. Therefore, you need to do something like this extension method.

static class ExtensionsForWPF
{
  public static System.Windows.Forms.Screen GetScreen(this Window window)
  {
    return System.Windows.Forms.Screen.FromHandle(new WindowInteropHelper(window).Handle);
  }
}

How to obtain screen size from xaml?

This will work. You can read more here about SystemParameters

<Window x:Class="WpfApplication1.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">
    <StackPanel>
        <TextBlock Text="{Binding Source={x:Static SystemParameters.FullPrimaryScreenHeight}}" />
        <TextBlock Text="{Binding Source={x:Static SystemParameters.FullPrimaryScreenWidth}}" />
        <TextBlock Text="{Binding Source={x:Static SystemParameters.PrimaryScreenHeight}}" />
        <TextBlock Text="{Binding Source={x:Static SystemParameters.PrimaryScreenWidth}}" />
    </StackPanel>
</Window>

---

Related Topics