//调用：（传入控件句柄即可）
public Image CaptureWindow(IntPtr handle)
{
IntPtr hdcSrc = User32.GetWindowDC(handle);
User32.RECT windowRect = new User32.RECT();
User32.GetWindowRect(handle, ref windowRect);
int width = windowRect.right - windowRect.left;
int height = windowRect.bottom - windowRect.top;
IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width - (int)(width * 0.01), height - (int)(height * 0.02));
IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);
GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY);
GDI32.SelectObject(hdcDest, hOld);
GDI32.DeleteDC(hdcDest);
User32.ReleaseDC(handle, hdcSrc);
Image img = Image.FromHbitmap(hBitmap);
GDI32.DeleteObject(hBitmap);
return(img);
}
/// <summary>
/// Creates an Image object containing a screen shot of a specific window
/// </summary>
/// <param name="handle">The handle to the window. (In windows forms, this is obtained by the Handle property)</param>
/// <returns></returns>
public Image CaptureWindow(IntPtr handle, int xstart, int ystart, int width, int height)
{
// get te hDC of the target window
IntPtr hdcSrc = User32.GetWindowDC(handle);
// get the size
User32.RECT windowRect = new User32.RECT();
User32.GetWindowRect(handle, ref windowRect);
//int width = windowRect.right - windowRect.left;
//int height = windowRect.bottom - windowRect.top;
// create a device context we can copy to
IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
// create a bitmap we can copy it to,
// using GetDeviceCaps to get the width/height
IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height);
// select the bitmap object
IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);
// bitblt over
GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, xstart, ystart, GDI32.SRCCOPY);
// restore selection
GDI32.SelectObject(hdcDest, hOld);
// clean up
GDI32.DeleteDC(hdcDest);
User32.ReleaseDC(handle, hdcSrc);
// get a .NET image object for it
Image img = Image.FromHbitmap(hBitmap);
// free up the Bitmap object
GDI32.DeleteObject(hBitmap);
return(img);
}
/// <summary>
/// Освобождение ресурсов системы.
/// </summary>
/// <param name="hBitmap">Указатель на структуру данных.</param>
/// <param name="hdcSrc">Указатель на структуру данных источника.</param>
/// <param name="hdcDest">Указатель на структуру данных назначения.</param>
private void Cleanup(int hBitmap, int hdcSrc, int hdcDest)
{
User32.ReleaseDC(User32.GetDesktopWindow(), hdcSrc);
GDI32.DeleteDC(hdcDest);
GDI32.DeleteObject(hBitmap);
}
/// <summary>
/// Получение снимка в формате Windows Bitmap
/// </summary>
/// <returns></returns>
public Bitmap CaptureScreen()
{
int hdcSrc = User32.GetWindowDC(User32.GetDesktopWindow()),
hdcDest = GDI32.CreateCompatibleDC(hdcSrc),
hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc,
GDI32.GetDeviceCaps(hdcSrc, 8), GDI32.GetDeviceCaps(hdcSrc, 10));
GDI32.SelectObject(hdcDest, hBitmap);
GDI32.BitBlt(hdcDest, 0, 0, GDI32.GetDeviceCaps(hdcSrc, 8),
GDI32.GetDeviceCaps(hdcSrc, 10),
hdcSrc, 0, 0, 0x00CC0020);
Bitmap btm = GetImage(hBitmap);
Cleanup(hBitmap, hdcSrc, hdcDest);
return(btm);
}
/// <summary>
///Создание снимка
/// </summary>
/// <param name="fileName">Название файла.</param>
/// <param name="imageFormat">Формат изображения.</param>
public void CaptureScreen(string fileName, ImageFormat imageFormat)
{
int hdcSrc = User32.GetWindowDC(User32.GetDesktopWindow()),
hdcDest = GDI32.CreateCompatibleDC(hdcSrc),
hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc,
GDI32.GetDeviceCaps(hdcSrc, 8), GDI32.GetDeviceCaps(hdcSrc, 10));
GDI32.SelectObject(hdcDest, hBitmap);
GDI32.BitBlt(hdcDest, 0, 0, GDI32.GetDeviceCaps(hdcSrc, 8),
GDI32.GetDeviceCaps(hdcSrc, 10),
hdcSrc, 0, 0, 0x00CC0020);
SaveImageAs(hBitmap, fileName, imageFormat);
Cleanup(hBitmap, hdcSrc, hdcDest);
}
