代码基本从网上搜集而来,整理成以下文件:
包括屏幕截图(和屏幕上看到的一致);
以及控件截图(只要该控件在本窗口内显示完全且不被其他控件遮挡就可正确截图)
- using System;
- using System.Collections.Generic;
- using System.Drawing;
- using System.Linq;
- using System.Runtime.InteropServices;
- using System.Text;
- using System.Threading.Tasks;
- using System.Windows.Forms;
- namespace LC
- {
- class ScreenCapture
- {
- #region 抓取屏幕
- /// <summary>
- /// 抓取屏幕(层叠的窗口)
- /// </summary>
- /// <param name="x">左上角的横坐标</param>
- /// <param name="y">左上角的纵坐标</param>
- /// <param name="width">抓取宽度</param>
- /// <param name="height">抓取高度</param>
- /// <returns></returns>
- public static Bitmap captureScreen(int x, int y, int width, int height)
- {
- Bitmap bmp = new Bitmap(width, height);
- using (Graphics g = Graphics.FromImage(bmp))
- {
- g.CopyFromScreen(new Point(x, y), new Point(0, 0), bmp.Size);
- g.Dispose();
- }
- //bit.Save(@"capture2.png");
- return bmp;
- }
- /// <summary>
- /// 抓取整个屏幕
- /// </summary>
- /// <returns></returns>
- public static Bitmap captureScreen()
- {
- Size screenSize = Screen.PrimaryScreen.Bounds.Size;
- return captureScreen(0,0,screenSize.Width,screenSize.Height);
- }
- #endregion
- #region 使用BitBlt方法抓取控件,无论控件是否被遮挡
- /// <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 = GetWindowDC(control.Handle);
- IntPtr hDest = CreateCompatibleDC(hSrce);
- IntPtr hBmp = CreateCompatibleBitmap(hSrce, control.Width, control.Height);
- IntPtr hOldBmp = SelectObject(hDest, hBmp);
- if (BitBlt(hDest, 0, 0, control.Width, control.Height, hSrce, 0, 0, CopyPixelOperation.SourceCopy | CopyPixelOperation.CaptureBlt))
- {
- Bitmap bmp = Image.FromHbitmap(hBmp);
- SelectObject(hDest, hOldBmp);
- DeleteObject(hBmp);
- DeleteDC(hDest);
- ReleaseDC(control.Handle, hSrce);
- // bmp.Save(@"a.png");
- // bmp.Dispose();
- return bmp;
- }
- return null;
- }
- // /// <summary>
- // /// 有问题!!!!!用户区域坐标不对啊
- // /// 控件(窗口)的用户区域截图,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>控件(窗口)的用户区域截图</returns>
- // public static Bitmap captureClientArea(Control control)
- // {
- //
- // Size sz = control.Size;
- // Rectangle rect = control.ClientRectangle;
- //
- //
- // //调用API截屏
- // IntPtr hSrce = GetWindowDC(control.Handle);
- // IntPtr hDest = CreateCompatibleDC(hSrce);
- // IntPtr hBmp = CreateCompatibleBitmap(hSrce, rect.Width, rect.Height);
- // IntPtr hOldBmp = SelectObject(hDest, hBmp);
- // if (BitBlt(hDest, 0, 0, rect.Width, rect.Height, hSrce, rect.X, rect.Y, CopyPixelOperation.SourceCopy | CopyPixelOperation.CaptureBlt))
- // {
- // Bitmap bmp = Image.FromHbitmap(hBmp);
- // SelectObject(hDest, hOldBmp);
- // DeleteObject(hBmp);
- // DeleteDC(hDest);
- // ReleaseDC(control.Handle, hSrce);
- // // bmp.Save(@"a.png");
- // // bmp.Dispose();
- // return bmp;
- // }
- // return null;
- //
- // }
- #endregion
- #region 使用PrintWindow方法抓取窗口,无论控件是否被遮挡
- /// <summary>
- /// 窗口的截图,窗口被遮挡时也可以正确截图,使用PrintWindow方法
- /// </summary>
- /// <param name="control">需要被截图的窗口</param>
- /// <returns>窗口的截图,控件被遮挡时也可以正确截图</returns>
- public static Bitmap captureWindowUsingPrintWindow(Form form)
- {
- return GetWindow(form.Handle);
- }
- private static Bitmap GetWindow(IntPtr hWnd)
- {
- IntPtr hscrdc = GetWindowDC(hWnd);
- Control control = Control.FromHandle(hWnd);
- IntPtr hbitmap = CreateCompatibleBitmap(hscrdc, control.Width, control.Height);
- IntPtr hmemdc = CreateCompatibleDC(hscrdc);
- SelectObject(hmemdc, hbitmap);
- PrintWindow(hWnd, hmemdc, 0);
- Bitmap bmp = Bitmap.FromHbitmap(hbitmap);
- DeleteDC(hscrdc);//删除用过的对象
- DeleteDC(hmemdc);//删除用过的对象
- return bmp;
- }
- #endregion
- #region DLL calls
- [DllImport("gdi32.dll")]
- static extern bool BitBlt(IntPtr hdcDest, int xDest, int yDest, int
- wDest, int hDest, IntPtr hdcSource, int xSrc, int ySrc, CopyPixelOperation rop);
- [DllImport("gdi32.dll")]
- static extern IntPtr DeleteDC(IntPtr hDc);
- [DllImport("gdi32.dll")]
- static extern IntPtr DeleteObject(IntPtr hDc);
- [DllImport("gdi32.dll")]
- static extern IntPtr CreateCompatibleBitmap(IntPtr hdc, int nWidth, int nHeight);
- [DllImport("gdi32.dll")]
- static extern IntPtr CreateCompatibleDC(IntPtr hdc);
- [DllImport("gdi32.dll")]
- static extern IntPtr SelectObject(IntPtr hdc, IntPtr bmp);
- [DllImport("user32.dll")]
- public static extern IntPtr GetDesktopWindow();
- [DllImport("user32.dll")]
- public static extern IntPtr GetWindowDC(IntPtr ptr);
- [DllImport("user32.dll")]
- public static extern bool PrintWindow(IntPtr hwnd, IntPtr hdcBlt, UInt32 nFlags);
- [DllImport("user32.dll")]
- static extern bool ReleaseDC(IntPtr hWnd, IntPtr hDc);
- #endregion
- }
- }