<asp:TemplateField HeaderText="Task Code">
                                 <EditItemTemplate>
                                     <asp:DropDownList ID="ddlTC" runat="server" DataTextField="name" 
                                                                                DataValueField="id" 
                                                                                Text='<%# Bind("task_code") %>'
                                                                                 ondatabinding="ddlTC_DataBinding" />
                                 </EditItemTemplate>
                                 <InsertItemTemplate>
                                     <asp:DropDownList ID="ddlTC" runat="server" DataTextField="name" 
                                                                                DataValueField="id" 
                                                                                Text='<%# Bind("task_code") %>'
                                                                                 ondatabinding="ddlTC_DataBinding" />
                                 </InsertItemTemplate>
                                 <ItemTemplate>
                                     <asp:Label ID="Label3" runat="server" Text='<%# Eval("tcname") %>'/>
                                 </ItemTemplate>
                             </asp:TemplateField>
                             <asp:BoundField DataField="SampleThr" HeaderText="Sample threshold" />