我正在我的 WPF 应用程序中调用SetWindowPlacement以保存和恢复窗口位置。这很好用，但是当窗口是工具窗口而不是标准窗口时，确保窗口永远不会完全隐藏的宣传能力似乎不起作用。您使用负的 Left 和 Right 放置调用 SetWindowPlacement，它会很高兴地在屏幕外打开它，而无法重新打开它。
有没有办法让 SetWindowPlacement 更正这些工具窗口的位置（对于缺少的监视器等）？
如果做不到这一点，有没有一种好的手动方法可以做到这一点？供参考，代码：
// RECT structure required by WINDOWPLACEMENT structure
[Serializable]
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
public RECT(int left, int top, int right, int bottom)
{
this.Left = left;
this.Top = top;
this.Right = right;
this.Bottom = bottom;
}
}
// POINT structure required by WINDOWPLACEMENT structure
[Serializable]
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
public int X;
public int Y;
public POINT(int x, int y)
{
this.X = x;
this.Y = y;
}
}
// WINDOWPLACEMENT stores the position, size, and state of a window
[Serializable]
[StructLayout(LayoutKind.Sequential)]
public struct WINDOWPLACEMENT
{
public int length;
public int flags;
public int showCmd;
public POINT minPosition;
public POINT maxPosition;
public RECT normalPosition;
}
public static class WindowPlacement
{
private static Encoding encoding = new UTF8Encoding();
private static XmlSerializer serializer = new XmlSerializer(typeof(WINDOWPLACEMENT));
[DllImport("user32.dll")]
private static extern bool SetWindowPlacement(IntPtr hWnd, [In] ref WINDOWPLACEMENT lpwndpl);
[DllImport("user32.dll")]
private static extern bool GetWindowPlacement(IntPtr hWnd, out WINDOWPLACEMENT lpwndpl);
private const int SW_SHOWNORMAL = 1;
private const int SW_SHOWMINIMIZED = 2;
public static void SetPlacement(IntPtr windowHandle, string placementXml)
{
if (string.IsNullOrEmpty(placementXml))
{
return;
}
WINDOWPLACEMENT placement;
byte[] xmlBytes = encoding.GetBytes(placementXml);
try
{
using (MemoryStream memoryStream = new MemoryStream(xmlBytes))
{
placement = (WINDOWPLACEMENT)serializer.Deserialize(memoryStream);
}
placement.length = Marshal.SizeOf(typeof(WINDOWPLACEMENT));
placement.flags = 0;
placement.showCmd = (placement.showCmd == SW_SHOWMINIMIZED ? SW_SHOWNORMAL : placement.showCmd);
SetWindowPlacement(windowHandle, ref placement);
}
catch (InvalidOperationException)
{
// Parsing placement XML failed. Fail silently.
}
}
public static string GetPlacement(IntPtr windowHandle)
{
WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
GetWindowPlacement(windowHandle, out placement);
using (MemoryStream memoryStream = new MemoryStream())
{
using (XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8))
{
serializer.Serialize(xmlTextWriter, placement);
byte[] xmlBytes = memoryStream.ToArray();
return encoding.GetString(xmlBytes);
}
}
}
}
使用顶部调用 SetPlacement：200，底部：600，左侧：-1000，右侧：-300。