In this post i am going to explain, how you can add icon to unkown document types. If you add a unkown document type to SharePoint library, a netural document icon appears.
Unkown Document Type
The above shown example is for PDF type document. In this example i am explaining about how to add pdf document icon but these steps are same for any document type.
1. Download pdf 16×16 icon
2. Store icon to following path of 14 hive folder
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\IMAGES
3. Open the file DOCICON.XML located in the folder C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\XML.
Add following line of code into section ByExtension tag
<Mapping Key=”pdf” Value=”pdf16.gif” />
4. Restart IIS with command iireset
Now you when you reload document library or add new pdf file you can see pdf icon associated to type column.
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