Question

我有一个位图（.bmp）文件，我想将其转换为元文件（.emf）格式。目前我正在使用此代码：

        Metafile metafile;
        using (MemoryStream stream = new MemoryStream())
        using (Graphics rtfBoxGraphics = m_ActiveTab.Controls[0].CreateGraphics())
        {
          IntPtr pDeviceContext = rtfBoxGraphics.GetHdc();

          metafile = new Metafile(stream, pDeviceContext);
          using (Graphics imageGraphics = Graphics.FromImage(metafile))
          {               
            imageGraphics.DrawImageUnscaled(bmp1, new Rectangle(0, 0,bmp1.Width, bmp1.Height));     
          }
          rtfBoxGraphics.ReleaseHdc(pDeviceContext);
        }

        // Get a handle to the metafile
        IntPtr iptrMetafileHandle = metafile.GetHenhmetafile();

        // Export metafile to an image file
        CopyEnhMetaFile(iptrMetafileHandle, @"e:\Test\test4.emf");

        // Delete the metafile from memory
        DeleteEnhMetaFile(iptrMetafileHandle);


[DllImport("gdi32.dll")]
static extern IntPtr CopyEnhMetaFile(  // Copy EMF to file
  IntPtr hemfSrc,   // Handle to EMF
  String lpszFile // File
);

[DllImport("gdi32.dll")]
static extern int DeleteEnhMetaFile(  // Delete EMF
  IntPtr hemf // Handle to EMF
);

为什么此代码无法正常运行？请提供完整的代码将位图文件转换为元文件（特别是.emf）文件。要么如果可能，请告诉我如何以图元文件格式保存图形对象。假设我有这段代码

Graphics NewGraphicsObj = m_ActiveTab.Controls[0].CreateGraphics();

现在我想将此NewGraphicsObj保存到图元文件中。

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提前致谢...

将位图转换为图元文件（.emf）

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