The first step would be to add a Template Field to the Grid View, which can be done through the Edit Columns option on the Grid View's Smart Tag.
Once the Template Field has been added, switch back to the HTML view and create an Now all that remains is to write the Compute Seniority Level() method. Compute Seniority Level() Method (Visual Basic) Figure 27 There are many situations in which you might want one or more Web controls embedded within a Grid View column.
The page contains a Grid View control that displays a list of customer names and addresses from the Adventure Works LT database.
When the user clicks the Delete link for a row, the handler for the event checks the last name of the person displayed in the row that the user is trying to delete.
If an employee had been employed for 1,000 days or less they'd be labeled a "Newbie"; had they been employed between 1,000 and 4,000 days, they'd be labeled an "Associate"; those having been working between 4,000 and 8,000 days would be labeled "One of the Regulars," while those employed for more than 8,000 days would have earned the label "An Ol' Fogey." To accomplish this you could use a Template Field that called a method in the ASP.