In this article, we are going to see how to generate sequence number (row number) in DataGrid. To generate sequence number, we will use the DataGridItem’s ItemIndex property. Code for ASPX is shown below,

<asp:DataGrid id="DataGrid1" style="Z-INDEX: 101; LEFT: 8px" runat="server"
SelectedItemStyle-BackColor="#99ccff" PagerStyle-Visible="False" PageSize="10" ItemStyle-CssClass="tableItem" HeaderStyle-CssClass="tableHeader" HeaderStyle-BackColor="#aaaadd" BorderColor="black" AutoGenerateColumns="False" DataKeyField="CustomerID">

   <Columns>
      <asp:templatecolumn headertext="Row Number">
         <itemtemplate>
            <%# Container.ItemIndex+1 %>
         </itemtemplate>
      </asp:templatecolumn>

            <asp:boundcolumn runat="server" DataField="CustomerID"
                        HeaderText="Customer ID"></asp:boundcolumn>
            <asp:boundcolumn runat="server" DataField="CompanyName"
                        HeaderText="Company Name"></asp:boundcolumn>
            <asp:boundcolumn runat="server" DataField="ContactName"
                        HeaderText="Contact Name"></asp:boundcolumn>
            <asp:boundcolumn runat="server" DataField="Address"
                        HeaderText="Address"></asp:boundcolumn>
            <asp:ButtonColumn runat="server" text="Show Details" visible="False"
                        HeaderText="Select"></asp:ButtonColumn>
   </Columns>

</asp:DataGrid>

Sample code as such is very simple, we will create one extra template column in our DataGrid and bind to it the value of Container.ItemIndex. The itemindex property is zero based so we will add one to it to start from one. So we have sequence number in DataGrid. DataGrid will look like this,