Can't generate .JPG files for multi-level linked RVT files

[impararia]

Hello

We have the following Revit file structure and we are trying to generate by using the following APIs,  JPG files at all levels: at the top level ExportImage & at the children levels GetPreviewImage (on the RevitLinkType).

The GetPreviewImage return a null Bitmap for all low level links.

Is-there a way to use another APIs or approach to generate all JPGs for all levels at one time.

Link Level	Name	Link Type	Related JPG file
0	Parent.RVT		Parent.JPG
1	Assembly1.RVT	Attachement	Assembly1.JPG
2	Detail11.RVT	Attachement	Detail11.JPG
2	Detail12.RVT	Attachement	Detail12.JPG
2	Assembly11.RVT	Attachement	Assembly11.JPG
3	Detail111.RVT	Attachement	Detail111.JPG

Regards

[rosalesduquej]

Hello,

So actually this week I had a different question using GetPreviewImage as well and found a couple of limitations with it, where I was getting null back for GroupTypes for example. The way I have used it succesfully before is with FamilyInstances but I have never tried it with Revit files and neither with Linked files. So I have a suggestion for you, if what you want is to create a preview of those Linked files, Why not generate the pictures of the project documents that will look like the default 3D view in Revit yourself.

Here is a nice couple of post by Jeremy Tammik where explains how to create those higher quality preview images, you can create it yourself

http://thebuildingcoder.typepad.com/blog/2013/08/setting-a-default-3d-view-orientation.html

Here is another discussion about setting the background colour for that very purpose:

http://thebuildingcoder.typepad.com/blog/2013/12/setting-the-view-display-background.html

There a lots of examples of that on the blog. Hope you will find this beneficial to what you are trying to do. 

Cheers,