We have 'Type'
column in document library which will display respective document ICON in a
view, but there is no direct OOTB way to display file extension in any of the
SharePoint column.
e.g. I have uploaded 'abc' word document and I
want to display 'abc.doc' in one of the SharePoint column.
Though I have found below articles which talks
about how to display file extension in SharePoint 2007 site by using SharePoint
Designer 2007 and converting list view to XLST data view web part, but as of
now I haven't find any good articles which point me to right direction for
SharePoint 2010 site.
Reference links for how to display file
extension for SharePoint 2007 site:
I have played around with display form in SharePoint Designer 2010 and somehow I
am able to display file extension in document library, now if someone asks me
to perform same steps into other site then again I have to look more deeply for
exact steps J
At last, we need to make changes in list
display form with below XSL tag which will display file extension in document
library.
<xsl:value-of select="$thisNode/@FileLeafRef.Name"
/>.<xsl:value-of
select="$thisNode/@File_x0020_Type" />
Hope above information will help!