How to use datagrid inside repeater control in vb.net

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VB

I have a repeater control.
I will return maximum 50 rows with various data, In this i want to use datagrid control inside repeater control that to based on repeater control value. How can i do this. Can post solution for this will be more helpful.

ASPX Code;

<asp:Repeater ID="RepDetails" runat="server" onitemdatabound="RepDetails_ItemDataBound">
<itemtemplate>
<table class="worksheet-frm" id="tblMain" width="100%"  runat="server">
<table><tbody><tr>
<td style="FONT-SIZE: 10pt">Case#</td>
<td style="BORDER-BOTTOM-WIDTH: 0px">
<asp:textbox id="txtCasenumber" runat="server" CssClass="input" Width="150px" Text='<%# DataBinder.Eval(Container.DataItem,"CaseNumber")%>'>
</td>
<td style="FONT-SIZE: 10pt">Date Appointment Set</td>
<td>
<asp:textbox id="txtDateAppointmentSet" runat="server" CssClass="input" Width="150px" Text='<%# DataBinder.Eval(Container.DataItem,"DateAppointmentSet")%>'>
</td>
<table><tbody><tr>
<td style="BORDER-TOP: #000066 3px solid" colspan="3">
<asp:DataGrid ID="grdJouranl" Runat="server"  AutoGenerateColumns="True" ShowHeader="True" AllowPaging="True"></td>
<td style="BORDER-TOP: #000066 3px solid" colspan="3">
<asp:DataGrid ID="grdOtherLeads" Runat="server" AutoGenerateColumns="True" ShowHeader="True" AllowPaging="True"></td>
</tr></tbody></table>

</tr></tbody></table></itemtemplate>

Code Behind

dt = oDM.GetDataSet("dbo.Select").Tables(0)
RepDetails.DataSource = dt
RepDetails.DataBind()

Repeater will show more then 20 rows. Here i want to load the datagrid based on txtCasenumber for every row of repeater control.

Thanks in advance