SharePoint 2013 Visual web part's GridView against XML file

Hi,

I have created a GrideView in a SharePoint 2013 Visual Web Part, I have an XML file that contains the data for the GridView.

The problem when I gave that GridView the xml file path, an error arias, it says "File Not Found".

I have tried relative path using these forms "~/XMLData/file.xml" & "../XMLData/file.xml" both of them are folder I created inside my project.

Help please.

Thanks in Advance :)