Show images into gridview from database

<asp:gridview id="grid" runat="server" onrowdatabound="grid_RowDataBound" xmlns:asp="#unknown">
     <columns>
         <asp:templatefield>
             <itemtemplate>
                 <asp:image runat="server" id="img" width="100px" height="100px" />
             </itemtemplate>
         </asp:templatefield>
     </columns>
 </asp:gridview>

protected void grid_RowDataBound(Object sender, GridViewRowEventArgs args)
       {
           if (args.Row.RowType == DataControlRowType.DataRow)
           {
               DataRowView rowView = (DataRowView)args.Row.DataItem;
               Image img = (Image)args.Row.FindControl("img");
               img.ImageUrl = rowView["Images"].ToString();
           }
       }