方法一：WINDOWS API画法
- //获取要绘制的控件句柄
- Image img = GetWindow(this.tabPage12.Handle);
- //在母容器上创建图形对象
- Graphics gOut = mOut.pnlOut.CreateGraphics();
- //在指定位置按指定大小绘出image
- gOut.DrawImage((Image)img, form1.pnlImage.DisplayRectangle, this.tabPage12.DisplayRectangle, GraphicsUnit.Pixel);
- //释放图形对象所有资源
- gOut.Dispose();
- img.Dispose();
- GC.Collect();
- form1.pnlImage.BringToFront();
-
- #region 截图函数
- [DllImport("gdi32.dll")]
- public static extern IntPtr CreateDC(
- string lpszDriver, // driver name驱动名
- string lpszDevice, // device name设备名
- string lpszOutput, // not used; should be NULL
- IntPtr lpInitData // optional printer data
- );
- [DllImport("gdi32.dll")]
- public static extern int BitBlt(
- IntPtr hdcDest, // handle to destination DC目标设备的句柄
- int nXDest, // x-coord of destination upper-left corner目标对象的左上角的X坐标
- int nYDest, // y-coord of destination upper-left corner目标对象的左上角的Y坐标
- int nWidth, // width of destination rectangle目标对象的矩形宽度
- int nHeight, // height of destination rectangle目标对象的矩形长度
- IntPtr hdcSrc, // handle to source DC源设备的句柄
- int nXSrc, // x-coordinate of source upper-left corner源对象的左上角的X坐标
- int nYSrc, // y-coordinate of source upper-left corner源对象的左上角的Y坐标
- UInt32 dwRop // raster operation code光栅的操作值
- );
- [DllImport("gdi32.dll")]
- public static extern IntPtr CreateCompatibleDC(
- IntPtr hdc // handle to DC
- );
- [DllImport("gdi32.dll")]
- public static extern IntPtr CreateCompatibleBitmap(
- IntPtr hdc, // handle to DC
- int nWidth, // width of bitmap, in pixels
- int nHeight // height of bitmap, in pixels
- );
- [DllImport("gdi32.dll")]
- public static extern IntPtr SelectObject(
- IntPtr hdc, // handle to DC
- IntPtr hgdiobj // handle to object
- );
- [DllImport("gdi32.dll")]
- public static extern int DeleteDC(
- IntPtr hdc // handle to DC
- );
- [DllImport("user32.dll")]
- public static extern bool PrintWindow(
- IntPtr hwnd, // Window to copy,Handle to the window that will be copied.
- IntPtr hdcBlt, // HDC to print into,Handle to the device context.
- UInt32 nFlags // Optional flags,Specifies the drawing options. It can be one of the following values.
- );
- [DllImport("user32.dll")]
- public static extern IntPtr GetWindowDC(
- IntPtr hwnd
- );
- public 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
方法二、给background赋值
- Bitmap bmp = new Bitmap(this.tabPage12.Width, this.tabPage12.Height);
- //将控件区域显呈到指定位图
- this.tabPage12.DrawToBitmap(bmp, this.tabPage12.DisplayRectangle);
- form1.pnlImage.BackgroundImage = (Image)bmp;
- /* 分屏显示座席 */
- form1.pnlImage.BackColor = Color.White;
- form1.pnlImage.BringToFront();
方法三、将某个屏幕位置拷贝到image
- Image img = new Bitmap(tabPage13.Width, tabPage13.Height);
- Graphics g = Graphics.FromImage(img);
- g.CopyFromScreen(Obj.PointToScreen(Point.Empty), Point.Empty, tabPage13.Size);
- IntPtr dc1 = g.GetHdc();
- g.ReleaseHdc(dc1);
- form1.pnlImage.BackgroundImage = img;
- form1.pnlImage.BringToFront();
