/// <summary>/// 传入控件取得控件的图像/// </summary>/// <param name="cl">控件</param>/// <returns>Bitmap控件截图</returns>public static Bitmap GetControl(Control cl) { Bitmap _BitMap = null; //判断如果是Panel，则调用Panel滚动截图的截图方法 if (cl is Panel) { Panel c = (Panel)cl; bool _PanelAotu = c.AutoScroll; Size _PanelSize = c.Size; c.Visible = false; c.AutoScroll = true; MoveBar(0, 0, c); MoveBar(1, 0, c); Point _Point = GetScrollPoint(c); c.Width += _Point.X + 5; c.Height += _Point.Y + 5; _BitMap = new Bitmap(c.Width, c.Height); c.DrawToBitmap(_BitMap, new Rectangle(0, 0, _BitMap.Width, _BitMap.Height)); c.AutoScroll = _PanelAotu; c.Size = _PanelSize; c.Visible = true; } else { //否则使用普通的控件截图方法 _BitMap = new Bitmap(cl.Width, cl.Height); cl.DrawToBitmap(_BitMap, cl.ClientRectangle); } return _BitMap;} /// <summary>/// 获取滚动条数据/// </summary>/// <param name="MyControl"></param>/// <param name="ScrollSize"></param>/// <returns></returns>private static Point GetScrollPoint(Control MyControl) { Point MaxScroll = new Point(); SCROLLINFO ScrollInfo = new SCROLLINFO(); ScrollInfo.cbSize = (uint)System.Runtime.InteropServices.Marshal.SizeOf(ScrollInfo); ScrollInfo.fMask = (uint)ScrollBarInfoFlags.SIF_ALL; GetScrollInfo(MyControl.Handle, 1, ref ScrollInfo); MaxScroll.Y = ScrollInfo.nMax - (int)ScrollInfo.nPage; if ((int)ScrollInfo.nPage == 0) MaxScroll.Y = 0; GetScrollInfo(MyControl.Handle, 0, ref ScrollInfo); MaxScroll.X = ScrollInfo.nMax - (int)ScrollInfo.nPage; if ((int)ScrollInfo.nPage == 0) MaxScroll.X = 0; return MaxScroll;}/// <summary>/// 移动控件滚动条位置/// </summary>/// <param name="Bar"></param>/// <param name="Point"></param>/// <param name="MyControl"></param>private static void MoveBar(int Bar, int Point, Control MyControl) { if (Bar == 0) { SetScrollPos(MyControl.Handle, 0, Point, true); SendMessage(MyControl.Handle, (int)0x0114, (int)ScrollBarRequests.SB_THUMBPOSITION, 0); } else { SetScrollPos(MyControl.Handle, 1, Point, true); SendMessage(MyControl.Handle, (int)0x0115, (int)ScrollBarRequests.SB_THUMBPOSITION, 0); }} #region API[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]public struct SCROLLINFO{ public uint cbSize; public uint fMask; public int nMin; public int nMax; public uint nPage; public int nPos; public int nTrackPos;}public enum ScrollBarInfoFlags{ SIF_RANGE = 0x0001, SIF_PAGE = 0x0002, SIF_POS = 0x0004, SIF_DISABLENOSCROLL = 0x0008, SIF_TRACKPOS = 0x0010, SIF_ALL = (SIF_RANGE | SIF_PAGE | SIF_POS | SIF_TRACKPOS)}public enum ScrollBarRequests{ SB_LINEUP = 0, SB_LINELEFT = 0, SB_LINEDOWN = 1, SB_LINERIGHT = 1, SB_PAGEUP = 2, SB_PAGELEFT = 2, SB_PAGEDOWN = 3, SB_PAGERIGHT = 3, SB_THUMBPOSITION = 4, SB_THUMBTRACK = 5, SB_TOP = 6, SB_LEFT = 6, SB_BOTTOM = 7, SB_RIGHT = 7, SB_ENDSCROLL = 8}[DllImport("user32.dll", CharSet = CharSet.Auto)]public static extern int GetScrollInfo(IntPtr hwnd, int bar, ref SCROLLINFO si);[DllImport("user32")]public static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool Rush);[DllImport("user32.dll", CharSet = CharSet.Auto)]public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);#endregion//使用方式
GetControl(panel1).Save(@"C:/1.bmp");
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