Abhijit,

I would suggest using the GridView's RowDatabound event which fires every
time a row's data is bound. Within that event handler subroutine you will
have access to the rows information and separate cells. You'll be able to
identify which is the new row. For example here is how you could check the
text in the third cell of a row:

If e.Row.RowType = DataControlRowType.DataRow Then
   If e.Row.Cells(2).Text = "My Text" Then
       '---Text was found
   End If
End If

Then when you know you have the right row you can set the row's background
color via its style property or via your own css stylesheet by changing the
row's css class: e.Row.Style or e.Row.CssClass