Question

when the user click on Edit from the gridview i want to highlight the row and here is what i have done but no effect. what else i am missing?

.SelectedRowStyle
{
    background-color: Yellow;
}

<asp:GridView runat="server" CssClass="DataWebControlStyle">
   <AlternatingRowStyle CssClass="AlternatingRowStyle" />
   <RowStyle CssClass="RowStyle" />
   <HeaderStyle CssClass="HeaderStyle" />
   <SelectedRowStyle CssClass="SelectedRowStyle" />
</asp:GridView>

Answer 1

here is how i able to fix:

if ((e.Row.RowType == DataControlRowType.DataRow & ((e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit))) {   
         e.Row.BackColor = Drawing.Color.Yellow;   
     }