Hello bartsipes,

In this scenario you can use “WebHierarchicalDataSource” control and configure it to use the different objects - http://help.infragistics.com/Help/NetAdvantage/ASPNET/2011.2/CLR4.0/html/Web_WebHierarchicalDataSource.html

You should add the needed relations to your Data Source in order to provide correct display of the grid parent and child bands.

http://samples.infragistics.com/aspnet/Samples/WebHierarchicalDataSource/Data/IntegrateDisperseData/Default.aspx?cn=hierarchical-data-source&sid=aee04b5e-aacd-4d41-9bb4-49648cc31d3d

I hope that this approach will be useful in your scenario.

Hey Alex, thanks for the reply. Unfortunately, I was not able to figure out what I need from that sample code. In the sample, the hierarchical data source has two other data sources that it uses to join data together via a DataRelation and then provide to the grid. The data I am trying to display has only one ObjectDataSource that has IEnumerable<T> child collections. I don't see any information on how to setup a DataReleation on an object for IEnumerable collections. According to the documentation (http://help.infragistics.com/Help/NetAdvantage/ASPNET/2011.2/CLR4.0/html/WebHierarchicalDataGrid_About_WebHierarchicalDataGrid.html) this is supported: "Hierarchical Data Source Support – Supports all hierarchical data source controls as well as DataSet objects and objects that implement the IEnumerable interface. "

I'm posting below a sample scenario of what I am trying to accomplish.

Here are my supporting classes that layout the object models:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace HierarchicalGrid.App_Code
{
    public class Class1
    {
        public string Value1 { get; set; }
        public List<Class2> FirstChildSet { get; set; }
    }
    public class Class2
    {
        public string Value2 { get; set; }
        public string Value3 { get; set; }
        public List<Class3> SecondChildSet { get; set; }
    }
    public class Class3
    {
        public string Value4 { get; set; }
        public int Value5 { get; set; }
    }
    public class DataHelper
    {
        public List<Class1> GetData()
        {
            List<Class1> data = new List<Class1>()
            {
                new Class1() {
                    Value1 = "First Row",
                    FirstChildSet = new List<Class2>()
                    {
                        new Class2() {
                            Value2 = "We got a sub row",
                            Value3 = "moles",
                            SecondChildSet = new List<Class3>()
                            {
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 1,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 2,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 3,
                                },
                            }
                        },
                        new Class2() {
                            Value2 = "Second Sub row",
                            Value3 = "antelope",
                            SecondChildSet = new List<Class3>()
                            {
                                new Class3() {
                                    Value4 = "THRID LEVEL under second row",
                                    Value5 =4,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 5,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 6,
                                },
                            }
                        },
                    }
                },
                new Class1() {
                    Value1 = "Second Row",
                    FirstChildSet = new List<Class2>()
                    {
                        new Class2() {
                            Value2 = "We got a sub row",
                            Value3 = "moles",
                            SecondChildSet = new List<Class3>()
                            {
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 7,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 8,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 9,
                                },
                            }
                        },
                        new Class2() {
                            Value2 = "Second Sub row",
                            Value3 = "antelope",
                            SecondChildSet = new List<Class3>()
                            {
                                new Class3() {
                                    Value4 = "THRID LEVEL under second row",
                                    Value5 = 10,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 11,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 12,
                                },
                            }
                        },
                    }
                },
                new Class1() {
                    Value1 = "Third Row",
                    FirstChildSet = new List<Class2>()
                    {
                        new Class2() {
                            Value2 = "We got a sub row",
                            Value3 = "moles",
                            SecondChildSet = new List<Class3>()
                            {
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 13,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 14,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 15,
                                },
                            }
                        },
                        new Class2() {
                            Value2 = "Second Sub row",
                            Value3 = "antelope",
                            SecondChildSet = new List<Class3>()
                            {
                                new Class3() {
                                    Value4 = "THRID LEVEL under second row",
                                    Value5 = 16,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 17,
                                },
                                new Class3() {
                                    Value4 = "THRID LEVEL",
                                    Value5 = 18,
                                },
                            }
                        },
                    }
                },
            };

            return data;
        }
    }
}

And here is my test web page:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="HierarchicalGrid.Default" %>

<%@ Register Assembly="Infragistics4.Web.v11.2, Version=11.2.20112.1019, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"
    Namespace="Infragistics.Web.UI.DataSourceControls" TagPrefix="ig" %>
<%@ Register Assembly="Infragistics4.Web.v11.2, Version=11.2.20112.1019, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"
    Namespace="Infragistics.Web.UI.GridControls" TagPrefix="ig" %>
<!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="sm" runat="server" />
    <ig:WebHierarchicalDataGrid ID="WebHierarchicalDataGrid1" runat="server" Height="350px"
        AutoGenerateBands="True" AutoGenerateColumns="True" Width="400px"
        DataMember="ObjectDataSource1_DefaultView"
        DataSourceID="WebHierarchicalDataSource1" Key="ObjectDataSource1_DefaultView">
    </ig:WebHierarchicalDataGrid>
    <ig:WebHierarchicalDataSource ID="WebHierarchicalDataSource1" runat="server">
        <DataViews>
            <ig:DataView ID="ObjectDataSource1_DefaultView" DataMember="DefaultView"
                DataSourceID="ObjectDataSource1" />
        </DataViews>
    </ig:WebHierarchicalDataSource>
    <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetData"
        TypeName="HierarchicalGrid.App_Code.DataHelper" DataObjectTypeName="HierarchicalGrid.App_Code.Class1">
    </asp:ObjectDataSource>
    </form>
</body>
</html>