How to force programmatically create Thumbnail in Sharepoint 2010 FOUNDATION

Question

I know in Sharepoint 2010 Foundation there is no Thumbnail feature but let me explain my problem 'cause I need just the thumbnail creation invoked programmatically, not to show the image or something like that so if the functionality is exposed by Object Model I can solve my problem.

I have a Web Service that expose some methods. One of the method I must implement had to get the "ID" of the file and return the thumbnail of the selected file.

To me the best could be:

• On file Adding: SPListItem.CREATETHUMBNAIL
• On my Web Service Invocation: return SPListItem.THUMBNAIL

Is there, in Sharepoint 2010 Foundation the possibility to return the Thumbnail of a file? There are other ways to implement it?

Thank you very much!

Answer 1

You can get a thumbnail image from SharePoint 2010 OOTB just using some URL manipulation on the image URL in the library. For example if you have an image at the URL:

http://server/site/library/image.jpg

You can get a thumbnail for this with the URL:

http://server/site/library/_t/image_jpg.jpg

To generate a thumbnail you must insert _t as an additional directory in the URL and append _[extension] to the filename before the extension.