如何获得活动屏幕尺寸？

Question

我正在寻找的是窗口当前所在的监视器的等效System.Windows.SystemParameters.WorkArea。

澄清：相关窗口为WPF，而不是WinForm。

Answer 1

Screen.FromControl，Screen.FromPoint和Screen.FromRectangle可以为您提供帮助。例如，在WinForms中它将是：

class MyForm : Form
{
  public Rectangle GetScreen()
  {
    return Screen.FromControl(this).Bounds;
  }
}

我不知道对WPF的等效调用。因此，您需要执行类似此扩展方法的操作。

static class ExtensionsForWPF
{
  public static System.Windows.Forms.Screen GetScreen(this Window window)
  {
    return System.Windows.Forms.Screen.FromHandle(new WindowInteropHelper(window).Handle);
  }
}

Answer 2

您可以使用它来获取主屏幕的桌面工作区边界：

System.Windows.SystemParameters.WorkArea

这对于获取主屏幕的大小也很有用：

System.Windows.SystemParameters.PrimaryScreenWidth System.Windows.SystemParameters.PrimaryScreenHeight

Answer 3

您也可能需要：

• SystemParameters.VirtualScreenWidth
• SystemParameters.VirtualScreenHeight

获取所有监视器的组合大小，而不是特定的大小。

Answer 4

添加不使用WinForms但使用NativeMethods的解决方案。 首先，您需要定义所需的本机方法。

public static class NativeMethods
{
    public const Int32 MONITOR_DEFAULTTOPRIMERTY = 0x00000001;
    public const Int32 MONITOR_DEFAULTTONEAREST = 0x00000002;


    [DllImport( "user32.dll" )]
    public static extern IntPtr MonitorFromWindow( IntPtr handle, Int32 flags );


    [DllImport( "user32.dll" )]
    public static extern Boolean GetMonitorInfo( IntPtr hMonitor, NativeMonitorInfo lpmi );


    [Serializable, StructLayout( LayoutKind.Sequential )]
    public struct NativeRectangle
    {
        public Int32 Left;
        public Int32 Top;
        public Int32 Right;
        public Int32 Bottom;


        public NativeRectangle( Int32 left, Int32 top, Int32 right, Int32 bottom )
        {
            this.Left = left;
            this.Top = top;
            this.Right = right;
            this.Bottom = bottom;
        }
    }


    [StructLayout( LayoutKind.Sequential, CharSet = CharSet.Auto )]
    public sealed class NativeMonitorInfo
    {
        public Int32 Size = Marshal.SizeOf( typeof( NativeMonitorInfo ) );
        public NativeRectangle Monitor;
        public NativeRectangle Work;
        public Int32 Flags;
    }
}

然后获取监视器句柄和监视器信息。

        var hwnd = new WindowInteropHelper( this ).EnsureHandle();
        var monitor = NativeMethods.MonitorFromWindow( hwnd, NativeMethods.MONITOR_DEFAULTTONEAREST );

        if ( monitor != IntPtr.Zero )
        {
            var monitorInfo = new NativeMonitorInfo();
            NativeMethods.GetMonitorInfo( monitor, monitorInfo );

            var left = monitorInfo.Monitor.Left;
            var top = monitorInfo.Monitor.Top;
            var width = ( monitorInfo.Monitor.Right - monitorInfo.Monitor.Left );
            var height = ( monitorInfo.Monitor.Bottom - monitorInfo.Monitor.Top );
        }

Answer 5

添加到ffpf

Screen.FromControl(this).Bounds

Answer 6

注意窗户的比例因子（100％/ 125％/ 150％/ 200％）。 您可以使用以下代码获取实际屏幕尺寸：

SystemParameters.FullPrimaryScreenHeight
SystemParameters.FullPrimaryScreenWidth

Answer 7

我想在打开我的第一个窗口之前获得屏幕分辨率，所以这里有一个快速解决方案，在实际测量屏幕尺寸之前打开一个不可见的窗口（你需要调整窗口参数到你的窗口，以确保两者在同一个屏幕上开放 - 主要是WindowStartupLocation很重要）

Window w = new Window();
w.ResizeMode = ResizeMode.NoResize;
w.WindowState = WindowState.Normal;
w.WindowStyle = WindowStyle.None;
w.Background = Brushes.Transparent;
w.Width = 0;
w.Height = 0;
w.AllowsTransparency = true;
w.IsHitTestVisible = false;
w.WindowStartupLocation = WindowStartupLocation.Manual;
w.Show();
Screen scr = Screen.FromHandle(new WindowInteropHelper(w).Handle);
w.Close();

Answer 8

我需要设置窗口应用程序的最大大小。这个可以相应地改变，应用程序已在主屏幕或辅助屏幕中显示。为了克服这个问题，我创建了一个简单的方法，我接下来告诉你：

/// <summary>
/// Set the max size of the application window taking into account the current monitor
/// </summary>
public static void SetMaxSizeWindow(ioConnect _receiver)
{
    Point absoluteScreenPos = _receiver.PointToScreen(Mouse.GetPosition(_receiver));

    if (System.Windows.SystemParameters.VirtualScreenLeft == System.Windows.SystemParameters.WorkArea.Left)
    {
        //Primary Monitor is on the Left
        if (absoluteScreenPos.X <= System.Windows.SystemParameters.PrimaryScreenWidth)
        {
            //Primary monitor
            _receiver.WindowApplication.MaxWidth = System.Windows.SystemParameters.WorkArea.Width;
            _receiver.WindowApplication.MaxHeight = System.Windows.SystemParameters.WorkArea.Height;
        }
        else
        {
            //Secondary monitor
            _receiver.WindowApplication.MaxWidth = System.Windows.SystemParameters.VirtualScreenWidth - System.Windows.SystemParameters.WorkArea.Width;
            _receiver.WindowApplication.MaxHeight = System.Windows.SystemParameters.VirtualScreenHeight;
        }
    }

    if (System.Windows.SystemParameters.VirtualScreenLeft < 0)
    {
        //Primary Monitor is on the Right
        if (absoluteScreenPos.X > 0)
        {
            //Primary monitor
            _receiver.WindowApplication.MaxWidth = System.Windows.SystemParameters.WorkArea.Width;
            _receiver.WindowApplication.MaxHeight = System.Windows.SystemParameters.WorkArea.Height;
        }
        else
        {
            //Secondary monitor
            _receiver.WindowApplication.MaxWidth = System.Windows.SystemParameters.VirtualScreenWidth - System.Windows.SystemParameters.WorkArea.Width;
            _receiver.WindowApplication.MaxHeight = System.Windows.SystemParameters.VirtualScreenHeight;
        }
    }
}

Answer 9

这是一个＆＃34;中心屏幕DotNet 4.5 solution＆＃34;，使用SystemParameters代替System.Windows.Forms或My.Compuer.Screen： 自Windows 8 has changed屏幕维度计算以来，它对我的​​唯一方式就是这样（包括任务栏计算）：

Private Sub Window_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded
    Dim BarWidth As Double = SystemParameters.VirtualScreenWidth - SystemParameters.WorkArea.Width
    Dim BarHeight As Double = SystemParameters.VirtualScreenHeight - SystemParameters.WorkArea.Height
    Me.Left = (SystemParameters.VirtualScreenWidth - Me.ActualWidth - BarWidth) / 2
    Me.Top = (SystemParameters.VirtualScreenHeight - Me.ActualHeight - BarHeight) / 2         
End Sub

Answer 10

在C＃winforms中我有一个起点（对于我们有几个监视器/ diplay并且一个表单调用另一个表格的情况）借助以下方法：

private Point get_start_point()
    {
        return
            new Point(Screen.GetBounds(parent_class_with_form.ActiveForm).X,
                      Screen.GetBounds(parent_class_with_form.ActiveForm).Y
                      );
    }

Answer 11

WinForms

对于多显示器设置，您还需要考虑X和Y位置：

struct Neuron
{
    vector<double> weights;
    vector<double> deltaWeights;
    vector<double> gradient;
    double value;
    double delta;
};

typedef vector<Neuron> Layer;

class Network
{
    public:
    Network(vector<unsigned>& Topology);
    double Sigmoid(double& x) { return 1 / (1 + exp(-x)); };
    double SigmoidDerivative(double& x) { return Sigmoid(x) * (1 - Sigmoid(x)); };
    double RandomWeights() { return ((double)rand() / RAND_MAX); };
    double ErrorFactor(vector<double>& TargetVals);
    void FeedForward(vector<double>& inputVals);
    void BackPropagation(vector<double>& targetVals);
private:
    vector<Layer> Net;
    const double alpha = 0.15; //learning rate
    const double epsilon = 0.3; //momentum
};

Answer 12

下面的 debugging 代码应该可以解决问题：

您可以浏览Screen Class

的属性

使用 Screen.AllScreens 将所有显示置于数组或列表中，然后捕获当前显示的索引及其属性。

C＃ （由Telerik转换为VB，请仔细检查）

        {
    List<Screen> arrAvailableDisplays = new List<Screen>();
    List<string> arrDisplayNames = new List<string>();

    foreach (Screen Display in Screen.AllScreens)
    {
        arrAvailableDisplays.Add(Display);
        arrDisplayNames.Add(Display.DeviceName);
    }

    Screen scrCurrentDisplayInfo = Screen.FromControl(this);
    string strDeviceName = Screen.FromControl(this).DeviceName;
    int idxDevice = arrDisplayNames.IndexOf(strDeviceName);

    MessageBox.Show(this, "Number of Displays Found: " + arrAvailableDisplays.Count.ToString() + Constants.vbCrLf + "ID: " + idxDevice.ToString() + Constants.vbCrLf + "Device Name: " + scrCurrentDisplayInfo.DeviceName.ToString + Constants.vbCrLf + "Primary: " + scrCurrentDisplayInfo.Primary.ToString + Constants.vbCrLf + "Bounds: " + scrCurrentDisplayInfo.Bounds.ToString + Constants.vbCrLf + "Working Area: " + scrCurrentDisplayInfo.WorkingArea.ToString + Constants.vbCrLf + "Bits per Pixel: " + scrCurrentDisplayInfo.BitsPerPixel.ToString + Constants.vbCrLf + "Width: " + scrCurrentDisplayInfo.Bounds.Width.ToString + Constants.vbCrLf + "Height: " + scrCurrentDisplayInfo.Bounds.Height.ToString + Constants.vbCrLf + "Work Area Width: " + scrCurrentDisplayInfo.WorkingArea.Width.ToString + Constants.vbCrLf + "Work Area Height: " + scrCurrentDisplayInfo.WorkingArea.Height.ToString, "Current Info for Display '" + scrCurrentDisplayInfo.DeviceName.ToString + "' - ID: " + idxDevice.ToString(), MessageBoxButtons.OK, MessageBoxIcon.Information);
}

VB （原始代码）

 Dim arrAvailableDisplays As New List(Of Screen)()
    Dim arrDisplayNames As New List(Of String)()

    For Each Display As Screen In Screen.AllScreens
        arrAvailableDisplays.Add(Display)
        arrDisplayNames.Add(Display.DeviceName)
    Next

    Dim scrCurrentDisplayInfo As Screen = Screen.FromControl(Me)
    Dim strDeviceName As String = Screen.FromControl(Me).DeviceName
    Dim idxDevice As Integer = arrDisplayNames.IndexOf(strDeviceName)

    MessageBox.Show(Me,
                    "Number of Displays Found: " + arrAvailableDisplays.Count.ToString & vbCrLf &
                    "ID: " & idxDevice.ToString + vbCrLf &
                    "Device Name: " & scrCurrentDisplayInfo.DeviceName.ToString + vbCrLf &
                    "Primary: " & scrCurrentDisplayInfo.Primary.ToString + vbCrLf &
                    "Bounds: " & scrCurrentDisplayInfo.Bounds.ToString + vbCrLf &
                    "Working Area: " & scrCurrentDisplayInfo.WorkingArea.ToString + vbCrLf &
                    "Bits per Pixel: " & scrCurrentDisplayInfo.BitsPerPixel.ToString + vbCrLf &
                    "Width: " & scrCurrentDisplayInfo.Bounds.Width.ToString + vbCrLf &
                    "Height: " & scrCurrentDisplayInfo.Bounds.Height.ToString + vbCrLf &
                    "Work Area Width: " & scrCurrentDisplayInfo.WorkingArea.Width.ToString + vbCrLf &
                    "Work Area Height: " & scrCurrentDisplayInfo.WorkingArea.Height.ToString,
                    "Current Info for Display '" & scrCurrentDisplayInfo.DeviceName.ToString & "' - ID: " & idxDevice.ToString, MessageBoxButtons.OK, MessageBoxIcon.Information)