How to get a WPF window's ClientSize?

Question

In WinForms, Form had a ClientSize property (inherited from Control), which returns the size of its client area, i.e., the area inside the title bar and window borders.

I'm not seeing anything similar in WPF: there's no ClientSize, ClientWidth, ClientHeight, GetClientSize(), or anything else that I can think to guess the name of.

How do I go about getting the client size of a WPF Window?

Answer 1

One way you could do it is to take the top most child element, cast this.Content to its type, and call .RenderSize on it, which will give you its size.

<Window x:Class="XML_Reader.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="400" Width="600" WindowStyle="SingleBorderWindow">
    <Grid VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
    </Grid>
</Window>

((Grid)this.Content).RenderSize.Height
((Grid)this.Content).RenderSize.Width

edit:

as Trent said, ActualWidth and ActualHeight are also viable solutions. Basically easier methods of getting what I put above.

Answer 2

One way to do it is with the code below.

   <Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
Title="Window1" Height="300" Width="300" Loaded="Window_Loaded">
    <Canvas>
    </Canvas>
</Window>


using System.Windows;

using System.IO;
using System.Xml;
using System.Windows.Controls;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            double dWidth = -1;
            double dHeight = -1;
            FrameworkElement pnlClient = this.Content as FrameworkElement;
            if (pnlClient != null)
            {
                dWidth = pnlClient.ActualWidth;
                dHeight = pnlClient.ActualWidth;
            }
        }
    }
}