I have a 2 level heirchy in radgrid.
When I select the Second Detail Table i want to dynamically render content in the

NestedViewTemplate.

What is the best way or event Iam using ItemCommand:

<

telerik:RadGrid ID="RadGridTariffSericeLevel" runat="server" DataSourceID="ObjectDataSourceTariffLanesByServiceLevel"

EnableLinqExpressions="false" Width="950px" Skin="Vista" GridLines="Horizontal"

AllowPaging="True" AutoGenerateColumns="false" Hei

OnItemCreated="RadGridTariffSericeLevel_ItemCreated"

OnItemCommand="RadGridTariffSericeLevel_ItemCommand"

onitemdatabound="RadGridTariffSericeLevel_ItemDataBound"

ondatabound="RadGridTariffSericeLevel_DataBound"

onselectedindexchanged="RadGridTariffSericeLevel_SelectedIndexChanged"

onneeddatasource="RadGridTariffSericeLevel_NeedDataSource" >

<ClientSettings>

<Selecting AllowRowSelect="True"></Selecting>

</ClientSettings>

<MasterTableView DataKeyNames="TariffDataID, ServiceLevelID" ShowFooter="true" DataSourceID="ObjectDataSourceTariffLanesByServiceLevel"

ItemStyle-BackColor="#eff4f8" AlternatingItemStyle-BackColor="#eff4f8" FooterStyle-ForeColor="Red" Font-Size="Large">

<Columns>

<telerik:GridBoundColumn DataField="ServiceLevelID" HeaderText="Service" HeaderStyle-Width="75px" />

<telerik:GridBoundColumn DataField="Lanes" HeaderText="Lanes" HeaderStyle-Width="75px"

Aggregate="Sum" FooterAggregateFormatString="{0:n0}" />

<telerik:GridBoundColumn DataField="ShipmentsPerMonth" HeaderText="Pros" HeaderStyle-Width="75px"

Aggregate="Sum" FooterAggregateFormatString="{0:n0}" />

<telerik:GridBoundColumn DataField="TotalCost" HeaderText="Total Cost" DataFormatString="{0:c2}"

Aggregate="Sum" FooterAggregateFormatString="{0:c2}" />

</Columns>

<DetailTables>

<telerik:GridTableView runat="server" Name="GridTableViewOrigin" DataSourceID="ObjectDataSourceTariffLanesByServiceLevelOrigin"

DataKeyNames="TariffDataID, ServiceLevelID, OriginServicePointID" AutoGenerateColumns="false" Width="100%" HierarchyLoadMode="ServerBind">

<Columns>

<telerik:GridBoundColumn DataField="OriginServicePointID" HeaderText="Origin" HeaderStyle-Width="75px" />

<telerik:GridBoundColumn DataField="Lanes" HeaderText="Lanes" HeaderStyle-Width="75px" />

<telerik:GridBoundColumn DataField="ShipmentsPerMonth" HeaderText="Pros" HeaderStyle-Width="75px" />

<telerik:GridBoundColumn DataField="TotalCost" HeaderText="Total Cost" DataFormatString="{0:c2}" />

</Columns>

<ParentTableRelation>

<telerik:GridRelationFields DetailKeyField="OriginServicePointID" MasterKeyField="ServiceLevelID" />

</ParentTableRelation>

<NestedViewTemplate>

<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>

<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Clicked" CommandName="Button1" />

</NestedViewTemplate>

</telerik:GridTableView>

</DetailTables>

</MasterTableView>

</telerik:RadGrid>

protected void RadGridTariffSericeLevel_ItemCommand(object source, GridCommandEventArgs e)

{

if (e.CommandName == "ExpandCollapse" && e.Item.OwnerTableView.Name == "GridTableViewOrigin")

{

GridDataItem OriginItem = (GridDataItem)e.Item;

GridNestedViewItem NestedViewItem = (GridNestedViewItem)OriginItem.ChildItem;

if (NestedViewItem != null)

{

PlaceHolder PlaceHolder1 = (PlaceHolder)NestedViewItem.FindControl("PlaceHolder1");

PlaceHolder1.Controls.Add(GetTable());

Label Label = (Label)NestedViewItem.FindControl("Label1");

}

}

}