WPF 全屏

前台页面：

<Grid>
        <Button Content="全屏" Height="47" HorizontalAlignment="Left" Margin="157,124,0,0" Name="button1" VerticalAlignment="Top" Width="146" Click="button1_Click" />
    </Grid>

后台代码：

bool Flag = false;
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            // 设置全屏  
            
            
            if (Flag)
            {
                this.WindowState = System.Windows.WindowState.Normal;
                this.WindowStyle = System.Windows.WindowStyle.None;
                this.ResizeMode = System.Windows.ResizeMode.NoResize;
                this.Topmost = true;

                this.Left = 0.0;
                this.Top = 0.0;
                this.Width = System.Windows.SystemParameters.PrimaryScreenWidth;
                this.Height = System.Windows.SystemParameters.PrimaryScreenHeight;

                Flag = false;

            }
            else
            {
                this.WindowState = System.Windows.WindowState.Normal;
                this.WindowStyle = System.Windows.WindowStyle.SingleBorderWindow;
                this.ResizeMode = System.Windows.ResizeMode.CanResize;
                this.Topmost = true;

                this.Left = 0.0;
                this.Top = 0.0;
                this.Width = 1350;
                this.Height = 768;

                Flag = true;
            }