在vs2005中,MSchart的图片保存遇到了问题。
在vs2003中,可以通过MSChart.EditCopy()方法,再从简帖板(ClipBoard)获得已经绘制的图片,然后再进行保存图片或者打印操作。
在Vs2005中,执行了MSChart.EditCopy()方法之后再次取用剪贴板就会报错,而且是很奇快的内存错误。于是上MS的Support网站寻求相关的帮助,终于搜集到了解决的办法。在这里向大家推荐一个通用的办法,可以保存Control的任何状态为图形。
需要增加一个辅助类:
1/// <summary>
2 /// 辅助类
3 /// </summary>
4 public class Win32
5 {
6 [System.Runtime.InteropServices.DllImport("gdi32", EntryPoint = "BitBlt")]
7 public static extern int BitBlt(int hDestDC, int x, int y, int nWidth, int nHeight, int hSrcDC, int xSrc, int ySrc, int dwRop);
8 [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "GetWindowDC")]
9 public static extern int GetWindowDC(int hwnd);
10 [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "ReleaseDC")]
11 public static extern int ReleaseDC(int hwnd, int hdc);
12 public const int SRCCOPY = 13369376;
13
14 }
借用这个辅助类生成控件的图形:2 /// 辅助类
3 /// </summary>
4 public class Win32
5 {
6 [System.Runtime.InteropServices.DllImport("gdi32", EntryPoint = "BitBlt")]
7 public static extern int BitBlt(int hDestDC, int x, int y, int nWidth, int nHeight, int hSrcDC, int xSrc, int ySrc, int dwRop);
8 [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "GetWindowDC")]
9 public static extern int GetWindowDC(int hwnd);
10 [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "ReleaseDC")]
11 public static extern int ReleaseDC(int hwnd, int hdc);
12 public const int SRCCOPY = 13369376;
13
14 }
1/// <summary>
2 /// 绘制整个控件位BitMap
3 /// </summary>
4 /// <param name="Control">要绘制的控件</param>
5 /// <returns></returns>
6 public static Bitmap CreateBitmap(Control Control)
7 {
8 Graphics gDest;
9 IntPtr hdcDest;
10 int hdcSrc;
11 int hWnd = Control.Handle.ToInt32();
12 Bitmap BmpDrawed = new Bitmap(Control.Width, Control.Height);
13 gDest = Graphics.FromImage(BmpDrawed);
14 hdcSrc = Win32.GetWindowDC(hWnd);
15 hdcDest = gDest.GetHdc();
16 Win32.BitBlt(hdcDest.ToInt32(), 0, 0, Control.Width, Control.Height, hdcSrc, 0, 0, Win32.SRCCOPY);
17 gDest.ReleaseHdc(hdcDest);
18 Win32.ReleaseDC(hWnd, hdcSrc);
19 return BmpDrawed;
20 }
2 /// 绘制整个控件位BitMap
3 /// </summary>
4 /// <param name="Control">要绘制的控件</param>
5 /// <returns></returns>
6 public static Bitmap CreateBitmap(Control Control)
7 {
8 Graphics gDest;
9 IntPtr hdcDest;
10 int hdcSrc;
11 int hWnd = Control.Handle.ToInt32();
12 Bitmap BmpDrawed = new Bitmap(Control.Width, Control.Height);
13 gDest = Graphics.FromImage(BmpDrawed);
14 hdcSrc = Win32.GetWindowDC(hWnd);
15 hdcDest = gDest.GetHdc();
16 Win32.BitBlt(hdcDest.ToInt32(), 0, 0, Control.Width, Control.Height, hdcSrc, 0, 0, Win32.SRCCOPY);
17 gDest.ReleaseHdc(hdcDest);
18 Win32.ReleaseDC(hWnd, hdcSrc);
19 return BmpDrawed;
20 }
陈国安
杭州三汇数字信息技术有限公司
杭州市文二路385#汽轮大厦7楼,310012
杭州三汇数字信息技术有限公司
杭州市文二路385#汽轮大厦7楼,310012