private static Bitmap GetWindow(IntPtr hWnd)
{
IntPtr hscrdc = WindowApi.GetWindowDC(hWnd);
Control control = Control.FromHandle(hWnd);
IntPtr hbitmap = WindowApi.CreateCompatibleBitmap(hscrdc, control.Width, control.Height);
IntPtr hmemdc = WindowApi.CreateCompatibleDC(hscrdc);
WindowApi.SelectObject(hmemdc, hbitmap);
WindowApi.PrintWindow(hWnd, hmemdc, 0);
Bitmap bmp = Bitmap.FromHbitmap(hbitmap);
WindowApi.DeleteDC(hscrdc); //删除用过的对象
WindowApi.DeleteDC(hmemdc); //删除用过的对象
return(bmp);
}
/// <summary>
/// 控件(窗口)的截图，控件被其他窗口(而非本窗口内控件)遮挡时也可以正确截图，使用BitBlt方法
/// </summary>
/// <param name="control">需要被截图的控件</param>
/// <returns>该控件的截图，控件被遮挡时也可以正确截图</returns>
public static Bitmap captureControl(Control control)
{
//调用API截屏
IntPtr hSrce = WindowApi.GetWindowDC(control.Handle);
IntPtr hDest = WindowApi.CreateCompatibleDC(hSrce);
IntPtr hBmp = WindowApi.CreateCompatibleBitmap(hSrce, control.Width, control.Height);
IntPtr hOldBmp = WindowApi.SelectObject(hDest, hBmp);
if (WindowApi.BitBlt(hDest, 0, 0, control.Width, control.Height, hSrce, 0, 0, CopyPixelOperation.SourceCopy | CopyPixelOperation.CaptureBlt))
{
Bitmap bmp = Image.FromHbitmap(hBmp);
WindowApi.SelectObject(hDest, hOldBmp);
WindowApi.DeleteObject(hBmp);
WindowApi.DeleteDC(hDest);
WindowApi.ReleaseDC(control.Handle, hSrce);
// bmp.Save(@"a.png");
// bmp.Dispose();
return(bmp);
}
return(null);
}
