Web Forms :: Tracking Browser Information Through XML File?

I have a grid which has three columns FilePath|Open|Download. My scenrio is to track the browsing information of particular file opened or download in XML file. In future i have to read and maniulate the same XML file for reporting purpose.

Each time the browser clicks the Open button or Dowload button i need to insert the details as a new record to xml file in the following format.

<TrackReport>
<UserBroswse>
<UName> user name </user>
<UType> Type </usertype>
<Datetime>clicked date time </Datetime>
<clickType>opened/Downloaded </Clicktype>
</UserBrowse>
</TrackReport>

I used the grid RowCommand event to track the linkbuttons CommandName whether it is open or download then we have to do the above scenario based on the button clicks.