如何使用信息？

[metaphy]

其实比较简单，就是把一个不定长字符串（包含某些信息）写入EMF文件的description字段（其中EMF structure中的Description String应该可以存这些信息）。当然前提是能够读取这一字段。
问题是用C＃肯定有比较现成的做法。哪位做过或知道怎么处理？
网上搜索的尽是使用GDI+在form上绘图的方式。我想要的是对EMF文件、流的操作的方式..
谢谢

[metaphy]

晕，标题怎么变成这样了

[xianguang321]

既然EMF文件的格式你知道，那你就可以用FileStream来定位写入。

[metaphy]

定位并写入，可能有问题。比如破坏了某一个结构，我对这个结构还不熟悉。。

我总感觉C#应该封装一个对象来提供操作，就像对MP3格式的album字段等修改一样简单。。

[metaphy]

也许真可以试试。修改下面2个字段就可以

nDescription (4 bytes): The number of Unicode characters in the optional description string that follows.

Description (variable): An optional, null-terminated Unicode string that describes this group of records.

[metaphy]

这是C++的一个封装。。C#有没有？？
Method Description
Metafile::ConvertToEmfPlus The ConvertToEmfPlus method converts this Metafile object to the EMF+ format.
Metafile::ConvertToEmfPlus The ConvertToEmfPlus method converts this Metafile object to the EMF+ format.
Metafile::ConvertToEmfPlus The ConvertToEmfPlus method converts this Metafile object to the EMF+ format.
Metafile::EmfToWmfBits Converts an enhanced-format metafile to a Windows Metafile Format (WMF) metafile and stores the converted records in a specified buffer.
Metafile::GetDownLevelRasterizationLimit Gets the rasterization limit currently set for this metafile. The rasterization limit is the resolution used for certain brush bitmaps that are stored in the metafile. For a detailed explanation of the rasterization limit, see SetDownLevelRasterizationLimit.
Metafile::GetHENHMETAFILE The GetHENHMETAFILE method gets a Windows handle to an Enhanced Metafile (EMF) file.
Metafile::GetMetafileHeader(WCHAR*,MetafileHeader*) The GetMetafileHeader method gets the header.
Metafile::GetMetafileHeader(HENHMETAFILE*,MetafileHeader*) The GetMetafileHeader method gets the header.
Metafile::GetMetafileHeader(HMETAFILE,WmfPlaceableFileHeader*,MetafileHeader*) The GetMetafileHeader method gets the metafile header of this metafile.
Metafile::GetMetafileHeader(MetafileHeader*) The GetMetafileHeader method gets the header.
Metafile::GetMetafileHeader(IStream*,MetafileHeader*) The GetMetafileHeader method gets the header.
Metafile::PlayRecord The PlayRecord method plays a metafile record.
Metafile::SetDownLevelRasterizationLimit Sets the resolution for certain brush bitmaps that are stored in this metafile.

[江城老温]

帮顶下先。