Since this grid is not hierarchal and only uses grouping, we only have one datasource that we populate in the standard NeedDataSource method
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" AlternatingItemStyle-BackColor="White"
commanditemdisplay="Top" CssClass="grid" Skin="Default" AllowPaging="False" PageSize="9999"
Width="100%" AllowAutomaticInserts="false" ShowFooter="true">
<MasterTableView DataKeyNames="SOPNUMBE, SOPTYPE, LNITMSEQ" CommandItemDisplay="Top" EditMode="InPlace" ShowGroupFooter="true" >
<GroupByExpressions>
<telerik:GridGroupByExpression>
<SelectFields>
<telerik:GridGroupByField FieldName="REQSHIPDATE" HeaderText="Req Ship Date" FormatString="{0:MM/dd/yyyy}" />
<telerik:GridGroupByField FieldName="sopnumbe" HeaderText="Order" />
</SelectFields>
<GroupByFields>
<telerik:GridGroupByField FieldName="REQSHIPDATE" HeaderText="REQSHIPDATE" />
<telerik:GridGroupByField FieldName="sopnumbe" HeaderText="REQSHIPDATE" />
</GroupByFields>
</telerik:GridGroupByExpression>
</GroupByExpressions>
<GroupFooterTemplate>
<asp:Label ID="lblOrderComment" runat="server" Text='<%# Eval("TXTHEADER")%>'> </asp:Label>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("boxes")%>'> </asp:Label>
</GroupFooterTemplate>
<DetailItemTemplate>
<%# Eval("txtline")%>
</DetailItemTemplate>
<Columns>
<telerik:GridHyperLinkColumn DataTextFormatString="{0}" DataNavigateUrlFields="Dex_row_id"
UniqueName="lnTable_Name" DataNavigateUrlFormatString="/PickingEdit.aspx?Dex_Row_ID={0}"
Text="Edit">
</telerik:GridHyperLinkColumn>
<telerik:GridBoundColumn DataField="ITEMNMBR" HeaderText="Item Number" ReadOnly="True" UniqueName="itemnmbr"></telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="itemdesc" HeaderText="Item Desc" ReadOnly="True">
</telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="SHIPMTHD" HeaderText="Ship Mthd" ReadOnly="True"></telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="SHIPMTHD" HeaderText="Ship Mthd" ReadOnly="True"></telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="TXTHEADER" HeaderText="TXTHEADER" Aggregate="First" Visible="false"></telerik:GridBoundColumn>
<telerik:GridBoundColumn DataField="boxes" HeaderText="TXTHEADER" Aggregate="First" Visible="false"></telerik:GridBoundColumn>
<telerik:GridDropDownColumn UniqueName="Status" ListTextField="Status" ListValueField="Status" ListDataMember="Status"
HeaderText="Status" DataField="Status" DropDownControlType="DropDownList"
AllowSorting="true" ReadOnly="false">
</telerik:GridDropDownColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>