need helps with Filter and TreeListTemplateColumn

[zxp]

Hi ,

I want to use TreeList on a page. I have some questions about the TreeList control.
1. I want to add a filter for the treelist,just like the filter for RadGrid. How to achieve that?
2. I put a TemplateColumn in the treelist, and I want to display a hyper link in for a column, as 
<telerik:radtreelist id="EntityGrid" runat="server" autogeneratecolumns="false" datakeynames="RecordID"
                parentdatakeynames="ParentID">
            <Columns>
                <telerik:TreeListTemplateColumn UniqueName="ImageHLColHeader" HeaderText="">
                <ItemTemplate>
                    <asp:HyperLink ID="imageHLCol" runat="server" NavigateUrl=<%# Eval("NavURL") %> ImageUrl=<%# Eval("NavImageURL") %> ></asp:HyperLink>
                </ItemTemplate>
                <HeaderStyle Width="35px" />
                </telerik:TreeListTemplateColumn>
            </Columns>
            </telerik:radtreelist>

But the column could not be displayed. It always show empty column in the UI. No  hyperlink is shown up. Seems like the hyperlink is ignored. I even try:
 <ItemTemplate>
                    <%# Eval("RecordID") %>
                </ItemTemplate>
But still could not see anything shown up in the UI. What's wrong?

3. I changed the itemTemplate as
<asp:HyperLink ID="imageHLCol" runat="server"></asp:HyperLink>
and I want to set the navigateURL and ImageURL when the event ItemDataBound is triggered. But I could not find the hyperLink control in that event.
TryCast(e.Item, TreeListDataItem)("ImageHLColHeader").FindControl("imageHLCol") always return nothing. What's wrong? 
Need urgent help. Thank you very very very much.

[zxp]

Any suggestion will be great appreciated.

[Radoslav]

Hello zxp,

Regarding your first question:

Unfortunately the RadTreeList control does not support filtering.

Regarding your second question:
Could you please try setting the Text property of the HyperLink control and let me know if the issue still exists. For example:

<telerik:TreeListTemplateColumn UniqueName="ImageHLColHeader" HeaderText="">
               <ItemTemplate>
                   <asp:HyperLink ID="imageHLCol" runat="server" Text="Link" NavigateUrl=<%# Eval("NavURL") %> ImageUrl=<%# Eval("NavImageURL") %> ></asp:HyperLink>
               </ItemTemplate>
               <HeaderStyle Width="35px" />
               </telerik:TreeListTemplateColumn>

Regarding your third question:
Could you please try using the following code snippet and let me know if it helps you:

Protected Sub RadTreeList1_ItemDataBound(ByVal sender As Object, ByVal e As TreeListItemDataBoundEventArgs)
        If TypeOf (e.Item) Is TreeListDataItem Then
            Dim link As HyperLink = CType(TryCast(e.Item, TreeListDataItem)("ImageHLColHeader").FindControl("imageHLCol"), HyperLink)
        End If
    End Sub

Looking forward for your reply.

Kind regards,
Radoslav
the Telerik team

[zxp]

Thanks for your reply. I have changed my code to use Grid.