How to fill RadGrid NestedViewTemplate from code behind?

Question

Got a situation when I need to move RadGrid from front page to code.

It used to look like this:

<telerik:RadGrid id="rgBooks" runat="server"
    Height="300px"
    Skin="Office2007"     
    EnableViewState="true"
    AutoGenerateColumns="False" >
        <MasterTableView 
            EditMode="inplace"
            TableLayout="auto" 
            ClientDataKeyNames="BookID, BookName, Created, Modified, BookTypeName, BookTypeID"
            NoMasterRecordsText="No available books." >
            <HeaderStyle Font-Bold="true" Font-Size="Small" />
            <ItemStyle Font-Size="Small" Font-Names="Arial" HorizontalAlign="Left" Wrap="True" BackColor="White"/>
            <HeaderStyle Wrap="False" Width="99%" HorizontalAlign="Left"/>
            <AlternatingItemStyle Font-Size="Small" Font-Names="Arial" HorizontalAlign="Left" Wrap="True" BackColor="White"/>  
            <NestedViewTemplate>
                <table>
                    <tr>
                        <td>
                            BookType Type:
                        </td>
                        <td>
                            <asp:DropDownList runat="server" ID="ddlBookTypes" AutoPostBack="true" /> 
                        </td>
                    </tr>

                    ....
                    ....

            </NestedViewTemplate>
            <columns>
                <telerik:GridBoundColumn HeaderText="Book Name" HeaderStyle-Width="33%" ItemStyle-Width="33%" UniqueName="BookName" DataField="BookName" />
                <telerik:GridBoundColumn HeaderText="Created" HeaderStyle-Width="33%" ItemStyle-Width="33%" UniqueName="Created" DataField="Created" />
                <telerik:GridBoundColumn HeaderText="Modified" HeaderStyle-Width="33%" ItemStyle-Width="33%" UniqueName="Modified" DataField="Modified" />
            </columns>

            ....
            ....

</telerik:RadGrid> 

And recreating this in code looks like this:

Dim rgBooks As New RadGrid : With rgBooks
   .ID = "rgBooks"
   .Height = New Unit(300, UnitType.Pixel)
   .Skin = "Office2007"

   ....
   ....       

End With

Me.placeHolder.Controls.Add(rgBooks)

It works fine EXCEPT for <NestedViewTemplate>. Didn't found a way to send there my values (table), and literally no documentation about how to do it. As I understand, it supposed to look like rgBooks.MasterTableView.NestedViewTemplate.InstantiateIn( and here my data ) but each attempt to sent there something ended with failure, and with exception Object reference not set to an instance of an object.

Also tried to sent as LiteralControl.

rgBooks.MasterTableView.Controls.Add(New LiteralControl("<NestedViewTemplate>"))
rgBooks.MasterTableView.Controls.Add(New LiteralControl("<table>"))
rgBooks.MasterTableView.Controls.Add(New LiteralControl("<tr>"))
....
....

Didn't worked out.

How I suppose to fill NestedViewTemplate in code correctly (it is ITemplate by the way)?

Answer 1

Ok, figured out how it supposed to work.

A custom class required

Public Class NestedTemplate
    Implements ITemplate

    Public Sub InstantiateIn(container As Control) Implements ITemplate.InstantiateIn

        container.Controls.Add(New LiteralControl("<table>"))
        container.Controls.Add(New LiteralControl("<tr>"))

        ....
        ....

        container.Controls.Add(New LiteralControl("</table>"))
    End Sub
End Class

And then just

rgBooks.MasterTableView.NestedViewTemplate = new NestedTemplate

Oh boy, how much time I wasted on this thing...