No sub rows showing

[Justin]

I have a RadTreeList setup that uses a generic list as its datasource. I have a parent and id columns and I verified that parent = id. I set the parent's id column to null.

The only thing that shows in the treelist is the parent row no children, no expand arrow. The datasource is has data. I get no errors.

Any ideas?

Here's my DataSource:
Dim geoDataList As List(Of FacilitiesList) = ds.GetDistanceGridFacilities(oLat, oLon, radius, facilityNumber)

        RadGeoTreeList.DataSource = geoDataList
        RadGeoTreeList.DataBind()

Here's the TreeList:
<telerik:RadAjaxPanel ID="RadAjaxPanel1" LoadingPanelID="RadAjaxLoadingPanel" runat="server">
            <telerik:RadTreeList runat="server" ID="RadGeoTreeList" Visible="true" DataKeyNames="FacilitiesreportingId" ParentDataKeyNames="VERA3" AutoGenerateColumns="false" 
            Width="100%" Height="400" ShowTreeLines="true">
                <Columns>
                    <telerik:TreeListBoundColumn DataField="FinanceNumber" HeaderText="Finance Number" UniqueName="FinanceNumber"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Origin" HeaderText="Origin" UniqueName="Origin"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Destination" HeaderText="Destination" UniqueName="Destination"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Address" HeaderText="Address" UniqueName="Address"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="City" HeaderText="City" UniqueName="City"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="State" HeaderText="State" UniqueName="State"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="ZipCode" HeaderText="Zip" UniqueName="ZipCode"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Distance" HeaderText="Driving Distance" UniqueName="Distance"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Area" HeaderText="Area" UniqueName="Area"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="PFC" HeaderText="PFC" UniqueName="PFC"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="OnRolls1" HeaderText="OnRolls" UniqueName="OnRolls"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Residual" HeaderText="Residual" UniqueName="Residual"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Withheld" HeaderText="Withheld" UniqueName="Withheld"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Optional1" HeaderText="OPT" UniqueName="Optional1"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="VERA1" HeaderText="VER" UniqueName="VERA1"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="VERA3" HeaderText="VERA3" UniqueName="VERA3"></telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="FacilitiesreportingId" HeaderText="FacilitiesreportingId" UniqueName="FacilitiesreportingId"></telerik:TreeListBoundColumn>
                </Columns>
            </telerik:RadTreeList>
        </telerik:RadAjaxPanel>
        <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel" runat="server" />

[Angel Petrov]

Hi Justin,

Setting the parent's id column to null will break the parent-child relation. By doing that you explicitly determine that the parent has no successors. More about the RadTreeList structure you can find in the following article.

Regards,
Angel Petrov
the Telerik team

[Justin]

Sorry I meant to say that the child Id of the parent is set to 0.

The problem ended up being nullable integers in my id columns, apparently that is a no-no.

I dont have the treelist completely working yet though. when I click the expand node the treelist disappears.

I will open a new thread for that.

[Angel Petrov]

Hello Justin,

Nullable integers in the id columns are supported by RadTreeList. I have created a simple solution using the aforementioned type. The root parent has id set to 0. You can find the project in the attachments.

All the best,
Angel Petrov
the Telerik team