Hierachical RadGrid with ListDataSource

on Thursday, January 23, 2014
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Telerik_Default" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    
    <asp:ScriptManager ID="Sc1" runat="server"></asp:ScriptManager>
   <div>
    
   <telerik:RadGrid ID="RadGrid1" runat="server" Width="800px" OnNeedDataSource="RadGrid1_NeedDataSource"
    OnDetailTableDataBind="RadGrid1_DetailTableDataBind">
    <MasterTableView HierarchyLoadMode="ServerBind">
    <DetailTables>
    <telerik:GridTableView>
    </telerik:GridTableView>
    </DetailTables>
    </MasterTableView>
    </telerik:RadGrid>
    </div>
    </form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Telerik.Web.UI;
public partial class Telerik_Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
    {
        List<Order> orders = new List<Order>();
        for(int i=0; i < 5; i++)
        {
            Order order = new Order();
            order.Id = i;
            order.ListOrderDetail = new List<OrderDetail>();
            for (int j = 0; j < 3; j++)
            {
                OrderDetail detail = new OrderDetail();
                detail.Article = string.Format("Order {0} Detail {1} Article Text",i,j);
                detail.Qte = 10 % (j + 1);
                detail.Price = 10d / (j + 1);
                order.ListOrderDetail.Add(detail);
            }
            orders.Add(order);
        }
        RadGrid1.DataSource = orders;
    }
    protected void RadGrid1_DetailTableDataBind(object sender, GridDetailTableDataBindEventArgs e)
    {
        e.DetailTableView.DataSource = ((Order)e.DetailTableView.ParentItem.DataItem).ListOrderDetail;
    }
    public class Order
    {
        public Order()
        {
        }
        public int Id { get; set; }
        public List<OrderDetail> ListOrderDetail { get; set; }
    }
    public class OrderDetail
    {
        public OrderDetail()
        {
        }
        public string Article { get; set; }
        public int Qte { get; set; }
        public double Price { get; set; }
        public double PriceHT { get { return Qte * Price; } }
    }
}
Gridview-Hierarchy

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