原文:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Forms;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;namespace ScreenShadow{    /// 
    /// MainWindow.xaml 的交互逻辑    /// 
    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }        private void Button_Click(object sender, RoutedEventArgs e)        {            Window1 window = new Window1();            window.Show();        }        private void Button_Click_1(object sender, RoutedEventArgs e)        {            Window2 window = new Window2();            window.Show();        }        List
         
           openWindows = new List
          
           ();        private void Button_Click_2(object sender, RoutedEventArgs e)        {            openWindows.Clear();            Screen[] screens = Screen.AllScreens;            if (screens.Length == 1)            {                lblmsg.Content = "已经投射1个显示器";            }            else if (screens.Length == 2)            {                lblmsg.Content = "已经投射2个显示器";            }            else if (screens.Length == 4)            {                lblmsg.Content = "已经投射4个显示器";            }            else {                lblmsg.Content = "目前仅支持1，2，4个显示器模式";            }            //主屏幕显示            Screen mainScreen = screens.FirstOrDefault(x=>x.Primary==true);            //主屏幕显示window1            Window1 win1 = new Window1();            win1.WindowState = WindowState.Maximized;            win1.WindowStartupLocation = WindowStartupLocation.Manual;            System.Drawing.Rectangle mswa = mainScreen.WorkingArea;            win1.Left = mswa.Left;            win1.Top = mswa.Top;            win1.Width = mswa.Width;            win1.Height = mswa.Height;            openWindows.Add(win1);            win1.Show();            //其他屏幕显示,这里假设有2个            var subScreen = (from o in screens where o.Primary == false select o).ToList
           
            ();            if (subScreen.Count > 0) {                var subscreen1 = subScreen[0];                Window2 win2 = new Window2();                win1.WindowState = WindowState.Maximized;                win1.WindowStartupLocation = WindowStartupLocation.Manual;                System.Drawing.Rectangle mswa2 = subscreen1.WorkingArea;                win2.Left = mswa2.Left;                win2.Top = mswa2.Top;                win2.Width = mswa2.Width;                win2.Height = mswa2.Height;                openWindows.Add(win2);                win2.Show();            }                              }        private void BtnClose_Click(object sender, RoutedEventArgs e)        {            if (openWindows.Count > 0) {                foreach (var item in openWindows)                {                    item.Close();                }            }        }    }}