How I can change background row in grid view when it updated?

[SafaaDalloul]

I want change the background row when I press on Update LinkButton in side grid view Please say to me what is wrong in this code I do it code but the background changed just in put C# word that means it's static on C# but I want when you do any value and updated it the result will be changed the background color:

if (e.Row.RowType == DataControlRowType.DataRow)
{
    if ((DataBinder.Eval(e.Row.DataItem, "cat_name")).ToString() == "C#")
   e.Row.BackColor = Color.Aquamarine; 
   // e.Row.Cells[2].BackColor = System.Drawing.Color.Red;
}

[Frinavale]

You need to keep track of which records have been updated somehow.
I can think of many ways to do this but think about how you would keep track of which rows/records were updated...try to think of your own solution on how to do this and we can go from there :)