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Server side Expand All only expands first level in hierarchy

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Grid
This is a migrated thread and some comments may be shown as answers.
Steve Newbery asked on 10 Nov 2008, 10:52 AM
I have added an Expand / Collapse All button to my RadGrid, which uses a 3-level hierarchy. Each level uses load mode ServerOnDemand. But the problem is that only the first level gets expanded.
I have adapted the CodeLibrary example http://www.telerik.com/community/code-library/aspnet-ajax/grid/expand-collapse-hierarchy-client-side-on-external-control-click.aspx
See below my adapted page - can anyone see why only the first level gets expanded? Even if I hard code item.Expanded = True it still doesn't work.
Steve
    
            <%@ Page EnableViewState="True" Language="VB" %> 
        
            <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
        
            <script runat="server">  
        
                Protected Sub ExpandCollapseButton_Click(ByVal sender As Object, ByVal e As EventArgs)  
        
                    '-----------------------------------------------------------------------  
        
                    ' Expand or Collapse all items in the grid  
        
                    '-----------------------------------------------------------------------  
        
                    For Each item As GridDataItem In RadGrid1.Items  
        
                        item.Expanded = Not item.Expanded  
        
                    Next  
        
                End Sub  
        
            </script> 
        
            <html xmlns="http://www.w3.org/1999/xhtml">  
        
            <head id="Head1" runat="server">  
        
                <title>Untitled Page</title> 
        
            </head> 
        
            <body style="margin: 0px;">  
        
                <form id="form1" runat="server">  
        
                    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager> 
        
                    <div> 
        
                        <asp:Button ID="ExpandCollapseButton" runat="server"   
        
                            Text="Expand/Collapse All"   
        
                            OnClick="ExpandCollapseButton_Click" /> 
        
                        <telerik:RadGrid ID="RadGrid1" DataSourceID="AccessDataSource1" runat="server" Skin="WebBlue" 
        
                            Width="95%" AutoGenerateColumns="False" PageSize="5" AllowSorting="True" AllowPaging="True" 
        
                            GridLines="None">  
        
                            <PagerStyle Mode="NumericPages"></PagerStyle> 
        
                            <MasterTableView DataSourceID="AccessDataSource1" DataKeyNames="CustomerID" Width="100%" 
        
                                HierarchyLoadMode="ServerOnDemand">  
        
                                <DetailTables> 
        
                                    <telerik:GridTableView DataKeyNames="OrderID" DataSourceID="AccessDataSource2" Width="100%" 
        
                                        runat="server" HierarchyLoadMode="ServerOnDemand">  
        
                                        <ParentTableRelation> 
        
                                            <telerik:GridRelationFields DetailKeyField="CustomerID" MasterKeyField="CustomerID" /> 
        
                                        </ParentTableRelation> 
        
                                        <DetailTables> 
        
                                            <telerik:GridTableView DataKeyNames="OrderID" DataSourceID="AccessDataSource3" Width="100%" 
        
                                                runat="server" HierarchyLoadMode="ServerOnDemand">  
        
                                                <ParentTableRelation> 
        
                                                    <telerik:GridRelationFields DetailKeyField="OrderID" MasterKeyField="OrderID" /> 
        
                                                </ParentTableRelation> 
        
                                                <Columns> 
        
                                                    <telerik:GridBoundColumn SortExpression="UnitPrice" HeaderText="Unit Price" HeaderButtonType="TextButton" 
        
                                                        DataField="UnitPrice" UniqueName="UnitPrice">  
        
                                                    </telerik:GridBoundColumn> 
        
                                                    <telerik:GridBoundColumn SortExpression="Quantity" HeaderText="Quantity" HeaderButtonType="TextButton" 
        
                                                        DataField="Quantity" UniqueName="Quantity">  
        
                                                    </telerik:GridBoundColumn> 
        
                                                    <telerik:GridBoundColumn SortExpression="Discount" HeaderText="Discount" HeaderButtonType="TextButton" 
        
                                                        DataField="Discount" UniqueName="Discount">  
        
                                                    </telerik:GridBoundColumn> 
        
                                                </Columns> 
        
                                            </telerik:GridTableView> 
        
                                        </DetailTables> 
        
                                        <Columns> 
        
                                            <telerik:GridBoundColumn SortExpression="OrderID" HeaderText="OrderID" HeaderButtonType="TextButton" 
        
                                                DataField="OrderID" UniqueName="OrderID">  
        
                                            </telerik:GridBoundColumn> 
        
                                            <telerik:GridBoundColumn SortExpression="OrderDate" HeaderText="Date Ordered" HeaderButtonType="TextButton" 
        
                                                DataField="OrderDate" UniqueName="OrderDate">  
        
                                            </telerik:GridBoundColumn> 
        
                                            <telerik:GridBoundColumn SortExpression="EmployeeID" HeaderText="EmployeeID" HeaderButtonType="TextButton" 
        
                                                DataField="EmployeeID" UniqueName="EmployeeID">  
        
                                            </telerik:GridBoundColumn> 
        
                                        </Columns> 
        
                                    </telerik:GridTableView> 
        
                                </DetailTables> 
        
                                <Columns> 
        
                                    <telerik:GridBoundColumn SortExpression="CustomerID" HeaderText="CustomerID" HeaderButtonType="TextButton" 
        
                                        DataField="CustomerID" UniqueName="CustomerID">  
        
                                    </telerik:GridBoundColumn> 
        
                                    <telerik:GridBoundColumn SortExpression="ContactName" HeaderText="Contact Name" HeaderButtonType="TextButton" 
        
                                        DataField="ContactName" UniqueName="ContactName">  
        
                                    </telerik:GridBoundColumn> 
        
                                    <telerik:GridBoundColumn SortExpression="CompanyName" HeaderText="Company" HeaderButtonType="TextButton" 
        
                                        DataField="CompanyName" UniqueName="CompanyName">  
        
                                    </telerik:GridBoundColumn> 
        
                                </Columns> 
        
                            </MasterTableView> 
        
                            <ClientSettings AllowExpandCollapse="true">  
        
                            </ClientSettings> 
        
                        </telerik:RadGrid> 
        
                        <asp:AccessDataSource ID="AccessDataSource1" DataFile="~/Grid/Data/Access/Nwind.mdb" 
        
                            SelectCommand="SELECT * FROM Customers" runat="server"></asp:AccessDataSource> 
        
                        <asp:AccessDataSource ID="AccessDataSource2" DataFile="~/Grid/Data/Access/Nwind.mdb" 
        
                            SelectCommand="SELECT * FROM Orders Where CustomerID = ?" runat="server">  
        
                            <SelectParameters> 
        
                                <asp:SessionParameter Name="CustomerID" SessionField="CustomerID" Type="string" /> 
        
                            </SelectParameters> 
        
                        </asp:AccessDataSource> 
        
                        <asp:AccessDataSource ID="AccessDataSource3" DataFile="~/Grid/Data/Access/Nwind.mdb" 
        
                            SelectCommand="SELECT * FROM [Order Details] where OrderID = ?" runat="server">  
        
                            <SelectParameters> 
        
                                <asp:SessionParameter Name="OrderID" SessionField="OrderID" Type="Int32" /> 
        
                            </SelectParameters> 
        
                        </asp:AccessDataSource> 
        
                    </div> 
        
                </form> 
        
            </body> 
        
            </html>
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Server side Expand All only expands first level in hierarchy

2 Answers, 1 is accepted
