Using DataGrid_ItemCreated

//Just add the Datagrid on to the Design View

<asp:DataGrid ID="DataGrid1" runat="server" AutoGenerateColumns="false" onitemcreated="DataGrid1_ItemCreated">
<Columns>
<asp:BoundColumn DataField="CustomerID" HeaderText="Customer ID"/>
<asp:BoundColumn DataField="CustomerName" HeaderText="Customer Name"/>
<asp:BoundColumn DataField="CustomerPhone" HeaderText="Customer Phone"/>
<asp:BoundColumn DataField="CustomerAddress" HeaderText="Customer Address"/>
<asp:BoundColumn DataField="CustomerAge" HeaderText="Customer Age"/>
</Columns>
</asp:DataGrid>

//Then Add the Event DataGrid_ItemCreated
protected void DataGrid1_ItemCreated(object sender, DataGridItemEventArgs e)
{
if(e.Item.ItemType == ListItemType.Header)
{
e.Item.Cells.RemoveAt(2);
e.Item.Cells[1].ColumnSpan = 2;
e.Item.Cells[1].Text = "<table border=\"1px\" style=\"width:100%; text-align:center; \"" +
" <tr align=\"centre\">" +
" <td colspan=\"2\">" +
" Name" +
" </td>" +
" </tr>" +
" </table>" +
"<table border=\" 1px\" " +
" <tr align=\"centre\">" +
" <td>" +
" First Name" +
" </td>" +
" <td>" +
" Last Name" +
" </td>" +
" </tr>" +
" </table>";
}
}