public static Bitmap PrtWindow(IntPtr hWnd)
{
IntPtr hscrdc = User32Api.GetWindowDC(hWnd);
Rectangle rect = Rectangle.Empty;
User32Api.GetWindowRect(hWnd, ref rect);
IntPtr hbitmap = Gdi32Help.CreateCompatibleBitmap(hscrdc, rect.Width - rect.Left, rect.Height - rect.Top);
IntPtr hmemdc = Gdi32Help.CreateCompatibleDC(hscrdc);
Gdi32Help.SelectObject(hmemdc, hbitmap);
User32Api.PrintWindow(hWnd, hmemdc, 0);
Bitmap bmp = Bitmap.FromHbitmap(hbitmap);
Gdi32Help.DeleteDC(hscrdc);
Gdi32Help.DeleteDC(hmemdc);
return(bmp);
}
/// <summary>
/// 截屏1
/// </summary>
/// <param name="windowModel"></param>
/// <returns></returns>
public static Bitmap PrintWindow(WindowModel windowModel)
{
IntPtr hscrdc = User32Api.GetWindowDC(windowModel.IntPtr); //返回hWnd参数所指定的窗口的设备环境。
int width = windowModel.WindowRectangle.Width;
int height = windowModel.WindowRectangle.Height;
IntPtr hbitmap = Gdi32Help.CreateCompatibleBitmap(hscrdc, width, height); //该函数创建与指定的设备环境相关的设备兼容的位图
IntPtr hmemdc = Gdi32Help.CreateCompatibleDC(hscrdc); //该函数创建一个与指定设备兼容的内存设备上下文环境（DC）
Gdi32Help.SelectObject(hmemdc, hbitmap); //该函数选择一对象到指定的设备上下文环境中，该新对象替换先前的相同类型的对象
User32Api.PrintWindow(windowModel.IntPtr, hmemdc, 0);
Bitmap bmp = Bitmap.FromHbitmap(hbitmap);
//Clipboard.SetImage(bmp);
Gdi32Help.DeleteDC(hscrdc); //删除用过的对象
Gdi32Help.DeleteDC(hmemdc); //删除用过的对象
return(bmp);
}
/// <summary>
/// Return an Image representing the Window!
/// As GDI+ draws it, it will be without Aero borders!
/// </summary>
public static TBitmap PrintWindow <TBitmap>(this IInteropWindow interopWindow) where TBitmap : class
{
var windowRect = interopWindow.GetInfo().Bounds;
// Start the capture
Exception exceptionOccured = null;
Bitmap printWindowBitmap;
using (var region = interopWindow.GetRegion())
{
var pixelFormat = PixelFormat.Format24bppRgb;
// Only use 32 bpp ARGB when the window has a region
if (region != null)
{
pixelFormat = PixelFormat.Format32bppArgb;
}
printWindowBitmap = new Bitmap(windowRect.Width, windowRect.Height, pixelFormat);
using (var graphics = Graphics.FromImage(printWindowBitmap))
{
using (var graphicsDc = graphics.GetSafeDeviceContext())
{
bool printSucceeded = User32Api.PrintWindow(interopWindow.Handle, graphicsDc.DangerousGetHandle(), PrintWindowFlags.PW_COMPLETE);
if (!printSucceeded)
{
// something went wrong, most likely a "0x80004005" (Acess Denied) when using UAC
exceptionOccured = new Win32Exception();
}
}
// Apply the region "transparency"
if (region != null && !region.IsEmpty(graphics))
{
graphics.ExcludeClip(region);
graphics.Clear(Color.Transparent);
}
graphics.Flush();
}
}
// Return null if error
if (exceptionOccured != null)
{
Log.Error().WriteLine("Error calling print window: {0}", exceptionOccured.Message);
printWindowBitmap.Dispose();
return(default);