记得引用命名空间using System.Windows.Interop;
后台代码：
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Interop;
namespace Full
{
public partial class Page : UserControl
{
public Page()
{
// 需要初始化变量
InitializeComponent();
Application.Current.Host.Content.FullScreenChanged += new EventHandler(Content_FullScreenChanged);
}
private void btn_Click(object sender, RoutedEventArgs e)
{
Content contentObject = Application.Current.Host.Content;
contentObject.IsFullScreen = !contentObject.IsFullScreen;
}
private void Content_FullScreenChanged(Object sender, EventArgs e)
{
Content contentObject = Application.Current.Host.Content;
if (contentObject.IsFullScreen)
{
btn.Background = new SolidColorBrush(Colors.Green);
btn.Content = "Full Screen Mode";
}
else
{
btn.Background = new SolidColorBrush(Colors.Red);
btn.Content = "Normal Mode";
}
}
}
}
前台代码：
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="Full.Page"
Width="640" Height="480">
<Canvas Background="#46461F">
<Button x:Name="btn" Background="Red" Width="200" Height="80" Canvas.Top="80" Canvas.Left="150" Content="Full Screen!" FontSize="20" Click="btn_Click"/>
</Canvas>
</UserControl>
