In this article, I will tell you about how to add new file type on your SharePoint 2010. First, you must assign an icon to the document in SharePoint.


Now, find a .png image of the icon of 16 x 16 pixel with transparency. 1

And then, copy this .png file to your Hive14 folder -> ..\14\Template\Images\image.png

Register the picture in the ..14\Template\xml\DOCICON.XML file, on section <ByExtension>, write the following code:

Save the file and test the upload of a .dmmx file:

2Declare document mime type as “downloadable” in IIS. Open the IIS Console and then browse to your Web Application.



Double click on the “Mime Types” menu of the selected Web Application.


On the “Action Pane”, top right of the IIS Console, select on the “Add…” button. And then, declare the custome Mime Type. Now, from the PowerShell, declare the Mime Type as “Downloadable” with the following code:

Now, I’m able to download the file from my SharePoint Site:


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