嗨，我目前正在创建一个动画桌面背景，它使用 axWindowsMideaPlayer 循环播放视频文件我采用 WMP 并将其句柄设置为桌面句柄，它在单显示器设置时效果很好，但在多显示器时失败。为什么它失败是因为监视器可以有自己的设置位置，例如主屏幕的左/右/左上/右上/上/下/左下和右下，这将它们的位置置于负片等等。我的问题是如何我可以在每台显示器上正确放置每个 WMP 吗？这是我到目前为止所拥有的，
这就是我获得每台显示器的方式...
public class DisplayInfo
{
public bool isPrimary { get; set; }
public int ScreenHeight { get; set; }
public int ScreenWidth { get; set; }
public Rect MonitorArea { get; set; }
public Rect WorkArea { get; set; }
public string DeviceName { get; set; }
}
/// <summary>
/// Collection of display information
/// </summary>
public class DisplayInfoCollection : List<DisplayInfo>
{
// size of a device name string
private const int CCHDEVICENAME = 32;
/// <summary>
/// The MONITORINFOEX structure contains information about a display monitor.
/// The GetMonitorInfo function stores information into a MONITORINFOEX structure or a MONITORINFO structure.
/// The MONITORINFOEX structure is a superset of the MONITORINFO structure. The MONITORINFOEX structure adds a string member to contain a name
/// for the display monitor.
/// </summary>
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
internal struct MONITORINFOEX
{
/// <summary>
/// The size, in bytes, of the structure. Set this member to sizeof(MONITORINFOEX) (72) before calling the GetMonitorInfo function.
/// Doing so lets the function determine the type of structure you are passing to it.
/// </summary>
public int Size;
/// <summary>
/// A RECT structure that specifies the display monitor rectangle, expressed in virtual-screen coordinates.
/// Note that if the monitor is not the primary display monitor, some of the rectangle's coordinates may be negative values.
/// </summary>
public Rect Monitor;
/// <summary>
/// A RECT structure that specifies the work area rectangle of the display monitor that can be used by applications,
/// expressed in virtual-screen coordinates. Windows uses this rectangle to maximize an application on the monitor.
/// The rest of the area in rcMonitor contains system windows such as the task bar and side bars.
/// Note that if the monitor is not the primary display monitor, some of the rectangle's coordinates may be negative values.
/// </summary>
public Rect WorkArea;
/// <summary>
/// The attributes of the display monitor.
///
/// This member can be the following value:
/// 1 : MONITORINFOF_PRIMARY
/// </summary>
public uint Flags;
/// <summary>
/// A string that specifies the device name of the monitor being used. Most applications have no use for a display monitor name,
/// and so can save some bytes by using a MONITORINFO structure.
/// </summary>
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHDEVICENAME)]
public string DeviceName;
public void Init()
{
this.Size = 40 + 2 * CCHDEVICENAME;
this.DeviceName = string.Empty;
}
}
[DllImport("user32.dll")]
private static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr lprcClip,
EnumMonitorsDelegate lpfnEnum, IntPtr dwData);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFOEX lpmi);
/*
[DllImport("user32.dll")]
static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFO lpmi);
*/
/// <summary>
/// Returns the number of Displays using the Win32 functions
/// </summary>
/// <returns>collection of Display Info</returns>
public static DisplayInfoCollection GetDisplays()
{
DisplayInfoCollection col = new DisplayInfoCollection();
EnumDisplayMonitors(IntPtr.Zero, IntPtr.Zero,
delegate (IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData)
{
MONITORINFOEX mi = new MONITORINFOEX();
mi.Size = (int)Marshal.SizeOf(mi);
bool success = GetMonitorInfo(hMonitor, ref mi);
if (success)
{
DisplayInfo di = new DisplayInfo();
di.ScreenWidth = (mi.Monitor.Right - mi.Monitor.Left);
di.ScreenHeight = (mi.Monitor.Bottom - mi.Monitor.Top);
di.MonitorArea = mi.Monitor;
di.WorkArea = mi.WorkArea;
di.isPrimary = Convert.ToBoolean(mi.Flags);
di.DeviceName = mi.DeviceName;
col.Add(di);
}
return true;
}, IntPtr.Zero);
return col;
}
}
这就是我尝试调用和使用它的方式，但它会根据显示器的位置将 WMP 放置在各处。
DisplayInfoCollection dic = DisplayInfoCollection.GetDisplays();
int count = 0;
int totalPosX = 0;
int totalPosY = 0;
DisplayInfo dInfo = null;
List<DisplayInfo> di = dic.OrderByDescending(d => d.isPrimary).ToList();
var or = SystemInformation.VirtualScreen;
foreach (DisplayInfo dm in di)
{
bool zeroOutX = false;
bool zeroOutY = false;
if (dm.isPrimary)
{
totalPosX = or.Left > 0 ? or.Left : -or.Left;
totalPosY = or.Top > 0 ? or.Top : -or.Top;
dInfo = dm;
}
else
{
bool left = false;
bool top = false;
bool right = false;
bool bottom = false;
bool topLeft = false;
bool topRight = false;
bool bottomLeft = false;
bool bottomRight = false;
int posY = dm.MonitorArea.Top > 0 ? dm.MonitorArea.Top : -dm.MonitorArea.Top;
if (dm.MonitorArea.Left < 0)
{
left = true;
}
else
right = dm.MonitorArea.Left > 0;
if (dm.MonitorArea.Top < 0)
{
top = true;
}
else
bottom = dm.MonitorArea.Top > 0;
bool center = (dm.MonitorArea.Left > 0 ?
dm.MonitorArea.Left : -dm.MonitorArea.Left) > 0 ||
(dm.MonitorArea.Left > 0 ?
dm.MonitorArea.Left : -dm.MonitorArea.Left) < dInfo.ScreenWidth;
topLeft = left && top;
topRight = right && top;
bottomLeft = left && bottom;
bottomRight = right && bottom;
if (topLeft || topRight || bottomLeft || bottomRight || left || right)
{
if (dm.MonitorArea.Left < 0)
zeroOutX = true;
else
totalPosX += dInfo.ScreenWidth;
if (dm.MonitorArea.Top < 0)
zeroOutY = true;
else
totalPosY += dm.MonitorArea.Top;
}
dInfo = dm;
}
Display display = new Display(dm.DeviceName, dm.ScreenWidth,
dm.ScreenHeight, zeroOutX ? 0 : totalPosX,
zeroOutY ? 0 : totalPosY, Controls, count);
Displays.Add(display);
count++;
}
我在这件事上找不到太多帮助，并尝试了很多方法来做到这一点，它的 ac# windows 窗体，我对编程很陌生，我的知识在这方面是有限的，任何帮助都将不胜感激。