在多显示器上启动应用程序

• 下载源代码 - 56.67 KB

引言

这已经是一个持续讨论的话题，我一直收到关于如何在不同的屏幕上启动 Windows 或在我们的例子中应用程序的问题。在我目前工作的梦想之城，我们有许多不同类型的适配器用于许多视听系统，并且像幸运抽奖、老虎机结果等应用程序必须自动启动到正确的视听设备上，以实现动画效果、其他屏幕上的随机数字等。

启动器

已启动

所有屏幕

获取系统当前托管的所有屏幕的信息，只需要这样做：System.Windows.Forms.Screen。

因此，要填充我们的下拉菜单，循环遍历

Screen[] scr = Screen.AllScreens
this.cmbDevices.Items.Clear();
foreach (System.Windows.Forms.Screen s in scr)
{
    strDeviceName = s.DeviceName.Replace("\\\\.\\", "");
    this.cmbDevices.Items.Add(strDeviceName);
    // you can check the device is primary or not this way
    if (s.Primary) this.cmbDevices.Items.Add(">" + strDeviceName);
    else this.cmbDevices.Items.Add(strDeviceName);
}
this.cmbDevices.SelectedIndex = 0;

启动

为了确保正确启动到正确的显示器，只需要正确设置两个属性：Form.StartPosition & Form.Location。

Screen[] scr = Screen.AllScreens
Form oForm = new Form()
oForm.Left = scr[0].Bounds.Width;
oForm.Top = scr[0].Bounds.Height;
oForm.StartPosition = FormStartPosition.Manual;
oForm.Location = scr[0].Bounds.Location;
        oForm.Show();

整合

好了，这就是将您的窗体启动到用户选择的显示器所需要的一切。

public partial class frmMain : Form
{
    Form[] aryForms = new Form[5];                      // Allow 5 total forms.
    int currentPointer = 0;                             //
    Screen[] scr = Screen.AllScreens;
    
    public frmMain()
    {
        InitializeComponent();
        LoadScreen();
    }
    
    private void LoadScreen()
    {
        String strDeviceName = String.Empty;
        
        this.cmbDevices.Items.Clear();
        foreach (Screen s in scr)
        {
            strDeviceName = s.DeviceName.Replace("\\\\.\\", "");
            this.cmbDevices.Items.Add(strDeviceName);
            /* Enable this section, if you want to point to 
	   user this is the default screen.
            if (s.Primary) this.cmbDevices.Items.Add(">" + strDeviceName);
            else this.cmbDevices.Items.Add(strDeviceName);
            */
        }
        this.cmbDevices.SelectedIndex = 0;
    }
    
    private void btnLaunchIn_Click(object sender, EventArgs e)
    {
        int intLaunchScreen = getScreenNumber(this.cmbDevices.SelectedItem.ToString());
        
        if (currentPointer <= 4)
        {
            aryForms[currentPointer] = new frmLaunchedWindow();
            aryForms[currentPointer].Text = 
		aryForms[currentPointer].Text + currentPointer;
            aryForms[currentPointer].Left = scr[intLaunchScreen].Bounds.Width;
            aryForms[currentPointer].Top = scr[intLaunchScreen].Bounds.Height;
            aryForms[currentPointer].StartPosition = FormStartPosition.Manual;
            aryForms[currentPointer].Location = scr[intLaunchScreen].Bounds.Location;
            //Point p = new Point(scr[0].Bounds.Location.X, scr[0].Bounds.Location.Y);
            //aryForms[currentPointer].Location = p;
            aryForms[currentPointer].Show();
            currentPointer += 1;
        }
    }
    private int getScreenNumber(String DeviceID)
    {
        int i = 0;
        foreach (Screen s in scr)
        {
            if (s.DeviceName == "\\\\.\\"+DeviceID) return i;
            i += 1;
        }
        // if cannot find the device reset to the default 0
        return 0;
    }
}

历史

• 2010年9月13日：初始发布