I have a webpart where I m displaying values from the database in a
datagrid. I also have a ButtonColumn which is basically a linkbutton. I
need to extract the row values, one by one when I hover the mouse
control over the link button of a row in the datagrid in a menu kinoff
using Ajax Hover panel sort of control.

Basically, my requirement demands Ajax to be used for displaying the
selected row values from the datagrid in a menu control when the mouse
is hovered over the linkbutton (which is basically a ButtonColumn). And
mind it, for users not known to the Ajax world, it is basically a
technology where data from the server is passed to the client for
display without a page postback with the help of the intermediate Ajax
layer, to make the long story short.