Nesting Datagrid Repeater DataList can be easily done. Any of these components can 
be nested within each other. 

here's a code that nests a CheckedListBox within a repeater. 
   
<table cellpadding="0" cellspacing="0" border="1">

<asp:Repeater ID="dlProcedures" runat="server">

<ItemTemplate>

<tr>

<td>

<%#Container.DataItem("CATEGORYNAME")%>

<asp:CheckBoxList ID="cblProc" runat="server" RepeatColumns=&
quot;4"  DataTextField="ProcedureName" DataValueField="ProcedureCode" 
DataSource='<%#GetProcedureList(Container.DataItem("CATEGORYCODE"))%>' 
></asp:CheckBoxList>

</td>

</tr>

</ItemTemplate>

</asp:Repeater>

</table>



Code Behind -

    Protected Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) 
    Handles Me.Load
        If Not IsPostBack Then
            Dim oCategory As New cCategory
            Dim oDataSet As New DataSet
            oDataSet = oCategory.GetCategoryList
            dlProcedures.DataSource = oDataSet.Tables(0)
            dlProcedures.DataBind()
        End If
    End Sub


    Public Function GetProcedureList(ByVal ProcedureCode As String) As DataTable
        Dim oProcedure As New cProcedure
        Dim odataset As New DataSet
        odataset = oProcedure.GetProcedureByCategory(ProcedureCode)
        Return odataset.Tables(0)
    End Function