private void button1_Click(object sender, EventArgs e)
{
Point ScrollMaxInfo = GetScrollPoint(panel1);
Size ControlMaxSize = GetControlSize(panel1, ScrollMaxInfo);
Bitmap ControlImage = new Bitmap(ControlMaxSize.Width, ControlMaxSize.Height);
Graphics MainGraphics = Graphics.FromImage(ControlImage);
Bitmap TempImage = new Bitmap(panel1.Width - 16, panel1.Height - 16);
int StepWidth = GetScrollNumb(panel1.Width - 16, ScrollMaxInfo.X);
int StepHeight = GetScrollNumb(panel1.Height - 16, ScrollMaxInfo.Y);
int LogWidth = 0;
int LogHeigh = 0;
MoveBar(0, 0, panel1);
for (int i = 0; i != StepWidth; i++)
{
MoveBar(1, 0, panel1);
LogHeigh = 0;
for (int z = 0; z != StepHeight; z++)
{
panel1.DrawToBitmap(TempImage, new Rectangle(0, 0, panel1.Width - 16, panel1.Height - 16));
MainGraphics.DrawImage(TempImage, LogWidth, LogHeigh);
MoveBar(1, panel1.Height - 16 + LogHeigh, panel1);
LogHeigh = GetScrollPoint(1, panel1);
}
MoveBar(0, panel1.Width - 16 + LogWidth, panel1);
LogWidth = GetScrollPoint(0, panel1);
}
MainGraphics.Dispose();
TempImage.Dispose();
ControlImage.Save(System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "123.png");
}
#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
/// <summary>
/// 获取目前滚动条位置
/// </summary>
/// <param name="Bar"></param>
/// <param name="MyControl"></param>
/// <returns></returns>
public static int GetScrollPoint(int Bar, Control MyControl)
{
SCROLLINFO ScrollInfo = new SCROLLINFO();
ScrollInfo.cbSize = (uint)System.Runtime.InteropServices.Marshal.SizeOf(ScrollInfo);
ScrollInfo.fMask = (uint)ScrollBarInfoFlags.SIF_ALL;
GetScrollInfo(MyControl.Handle, Bar, ref ScrollInfo);
return ScrollInfo.nPos;
}
/// <summary>
/// 获取循环几次获得图形
/// </summary>
/// <returns></returns>
private static int GetScrollNumb(int MyControlNumb, int ScrollMaxInfoNumb)
{
double Step = (double)ScrollMaxInfoNumb / (double)MyControlNumb;
Step++;
if ((int)Step == Step)
{
return (int)Step;
}
else
{
return (int)Step + 1;
}
}
/// <summary>
/// 获得控件不需要滚动条的宽和高（最终图形大小）
/// </summary>
/// <param name="MyControl"></param>
/// <param name="ScrollMaxInfo"></param>
/// <returns></returns>
private static Size GetControlSize(Control MyControl, Point ScrollMaxInfo)
{
return new Size(MyControl.Size.Width + ScrollMaxInfo.X - 16, MyControl.Size.Height + ScrollMaxInfo.Y - 16);
}
/// <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);
}
}