Screen 类

下面的代码示例演示如何使用 Screen 类的各种方法和属性。 该示例调用 AllScreens 属性来检索连接到系统的所有屏幕的数组。 对于每个返回的 Screen，该示例将设备名称、边界、类型、工作区和主屏幕添加到 ListBox。

 1 private void button1_Click(object sender, System.EventArgs e)
 2   {
 3       int index;
 4       int upperBound;
 5
 6       // Gets an array of all the screens connected to the system.
 7
 8
 9       Screen [] screens = Screen.AllScreens;
10       upperBound = screens.GetUpperBound(0);
11
12       for(index = 0; index <= upperBound; index++)
13       {
14
15           // For each screen, add the screen properties to a list box.
16
17
18           listBox1.Items.Add("Device Name: " + screens[index].DeviceName);
19           listBox1.Items.Add("Bounds: " + screens[index].Bounds.ToString());
20           listBox1.Items.Add("Type: " + screens[index].GetType().ToString());
21           listBox1.Items.Add("Working Area: " + screens[index].WorkingArea.ToString());
22           listBox1.Items.Add("Primary Screen: " + screens[index].Primary.ToString());
23
24       }
25
26   }

所谓的分屏或多屏软件，就是把软件中的多个窗体，在主屏幕运行，但是把各个窗体（坐标）移动到各个扩展屏幕位置上如下图所示：

以下介绍最常用的双屏幕显示，也就是左右模式的屏幕显示的方法。

WinForm 的实现办法：

利用WinForm中的Screen类，即可比较方便地实现多窗体分别在多个屏幕上显示。

• 获取当前系统连接的屏幕数量： Screen.AllScreens.Count();
• 获取当前屏幕的名称：string CurrentScreenName = Screen.FromControl(this).DeviceName;
• 获取当前屏幕对象：Screen CurrentScreen = Screen.FromControl(this);
• 获取当前鼠标所在的屏幕：Screen CurrentScreen = Screen.FromPoint(new Point(Cursor.Position.X, Cursor.Position.Y));
• 让窗体在第2个屏幕上显示：

this.Left = ((Screen.AllScreens[1].Bounds.Width - this.Width) / 2);
     this.Top = ((Screen.AllScreens[1].Bounds.Height - this.Height) / 2);

把任何窗体显示在任何屏幕的方法：

Winform:

1 Screen[] sc;
2             sc = Screen.AllScreens;
3             this.StartPosition = FormStartPosition.Manual;
4             this.Location = new Point(sc[1].Bounds.Left, sc[1].Bounds.Top);
5             // If you intend the form to be maximized, change it to normal then maximized.
6             this.WindowState = FormWindowState.Normal;
7             this.WindowState = FormWindowState.Maximized;
8             MessageBox.Show(this.Handle.ToString());

WPF:

 1 protected override void OnStartup(StartupEventArgs e)
 2         {
 3             base.OnStartup(e);
 4
 5             Window1 w1 = new Window1();
 6             Window2 w2 = new Window2();
 7
 8
 9             Screen s1 = Screen.AllScreens[0];
10             Screen s2 = Screen.AllScreens[1];
11
12             Rectangle r1 = s1.WorkingArea;
13             Rectangle r2 = s2.WorkingArea;
14
15             w1.Top = r1.Top;
16             w1.Left = r1.Left;
17
18             w2.Top = r2.Top;
19             w2.Left = r2.Left;
20
21             w1.Show();
22             w2.Show();
23
24             w2.Owner = w1;
25
26
27         }

C# Screen 类（多屏幕开发）