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/// <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