问：

REVIT 2011的API中如何实现链接rvt文件。
sdk里面chm文件里面好像只有导入CAD的。
我需要在我的rvt文件里面导入另外几个rvt文件进来并显示。

下图为Revit 2020 API ，表明：导入和链接均不提供对 RVT 文件的操作。

答复：

Revit 2011没有提供API来连接外部rvt文件。

Revit 2012 也没有开放链接外部rvt的API，但是2012提供了更多的对已经连接进来的模型的管理和查询。

• ExternalFileReference – A non-Element class which contains path and type information for a single external file which a Revit project references. ExternalFileReference also contains information about whether the external file was loaded or unloaded the last time the associated Revit project was opened.
• ExternalFileUtils – A utility class which allows the user to find all external file references, get the external file reference from an element, or tell whether an element is an external file reference.
• RevitLinkType – An element representing a Revit file linked into a Revit project.
• CADLinkType – An element representing a DWG drawing. CADLinkTypes may be links, which maintain a relationship with the file they originally came from, or imports, which do not maintain a relationship. The property IsImport will distinguish between the two kinds.
• LinkType – The base class of RevitLinkType and CADLinkType.
• ModelPath – A non-Element class which contains path information for a file (not necessarily a .rvt file.) Paths can be to a location on a local or network drive, or to a Revit Server location.
• ModelPathUtils – A utility class which provides methods for converting between strings and ModelPaths.
• TransmissionData – A class which stores information about all of the external file references in a document. The TransmissionData for a Revit project can be read without opening the document.

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作者：叶雄进文章来源：http://blog.csdn.net/joexiongjin/article/category/782739