我建立一个简单的 WPF 应用程序。我有一个的透明最大化的窗口和画布（canvas1）。

I am building a simple WPF application. I have a transparent maximized Window and a Canvas (canvas1).

我想在鼠标的位置 canvas1 或主窗口（以这种情况下是同样的事情）。

I want to get the mouse position in canvas1 or in MainWindow (in this case is same thing).

有关这样做的我用这个code：

For doing this I use this code:

Point p = Mouse.GetPosition(canvas1); //and then I have p.X and p.Y

这code正常工作的非透明 画布。问题是，我有一个透明 画布，这code不工作...（它不给我错误，但坐标的pX = 0 和 PY = 0 ）。

This code works fine for a non-transparent Canvas. The problem is that I have a transparent Canvas, and this code doesn't work... (It doesn't give me errors, but the coordinates are p.X = 0 and p.Y = 0).

我怎样才能解决这个问题？

推荐答案

一个可能的解决办法是使用 GetCursorPos Win32函数：

One possible workaround is to use GetCursorPos Win32 function:

    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool GetCursorPos(out System.Drawing.Point lpPoint); 

您必须坐标从像素点，如果你想用它在WPF转换。

You have to convert the coordinates from pixels to points if you want to use it in WPF.

用例：

System.Drawing.Point point;
if(!GetCursorPos(out point))
    throw new InvalidOperationException("GetCursorPos failed");
// point contains cursor's position in screen coordinates.