[Solved] Get parent node in controller action

[Donna Stewart]

How do I get the parent node value in the controller action for the load on demad ajax binding?  I have tried node.Parent, but it is nothing/null/empty.  Also, setting the content of the node is not working, and I know it is getting populated with the html, so any advice you can give there is very much appreciated as well.  Thank you so much for your help!

Donna

Here's the treeview:

<%= Html.Telerik().TreeView().Name("ReportGroups").ShowCheckBox(True).HtmlAttributes(New With {.style = "font-size:1em; height:550px;"}) _
                                                .ClientEvents(Function(evt) evt.OnSelect("getReports")) _
                                                .ClientEvents(Function(evt) evt.OnLoad("setContextMenu")) _
                                                .ClientEvents(Function(evt) evt.OnDataBound("onTreeViewLoad")) _
                                                .ClientEvents(Function(evt) evt.OnCollapse("updateTreeViewState")) _
                                                .ClientEvents(Function(evt) evt.OnExpand("updateTreeViewState")) _
    .BindTo(CType(Model.reportGroupNames, IEnumerable(Of SelectListItem)),
        Sub(mappings)
            mappings.For(Of SelectListItem)(
            Sub(binding)
                binding _
                    .ItemDataBound(
                        Sub(item, rpt)
                            Dim isExpanded As Boolean = DirectCast(ViewData("ExpandedNodes"), String()).Contains(rpt.Text)
                            If isExpanded Then
                                item.Text = "<span class='expanded'></span>" + rpt.Text
                            Else
                                item.Text = rpt.Text
                            End If
                            item.Value = rpt.Value
                            item.LoadOnDemand = True
                        End Sub)
            End Sub)
        End Sub) _
    .DataBinding(Function(dataBinding) dataBinding.Ajax().Select("GetUserGroupsForReportGroups", "Report"))
%>

Here's the controller action code (I have bolded the line of code in question - it has been commented out in the code so it is in green):

<AcceptVerbs(HttpVerbs.Post)> _
Function GetUserGroupsForReportGroups(ByVal node As TreeViewItem) As ActionResult
    Try
        Dim gmcPermissions As New GMCPermissions
        Dim groupNameKey As Integer = node.Value.Substring(node.Value.IndexOf(".") + 1)
        Dim nodes As New List(Of TreeViewItem)
        If node.Value.Substring(0, node.Value.IndexOf(".")).Equals("report") Then
            Dim usrGrps As List(Of WebUserGroupName) = gmcPermissions.GetWebUserGroupNamesForReportGroupName(groupNameKey)
            For Each usrGrp In usrGrps
                nodes.Add(New TreeViewItem With {.Text = "<span style='font-size:.9em;'>" + usrGrp.UserGroupName + "</span>",
                                                 .Value = "usergroup." + usrGrp.UserGroupNameKey.ToString, .LoadOnDemand = True, .Encoded = False})
            Next
        Else
            '                Dim ugRptInfoList As List(Of GMCListItem) = gmcPermissions.GetReportTypesForUserGroupName(node.Parent.Value.Substring(node.Parent.Value.IndexOf(".") + 1), groupNameKey)
            Dim ugRptInfoList As List(Of GMCListItem) = gmcPermissions.GetReportTypesForUserGroupName(48, groupNameKey)
            Dim taskInfo As String
            For Each ugRptType In ugRptInfoList
                taskInfo = If(NullS(ugRptType.dataObject).Equals(""), "", "%><ul><li>" + ugRptType.dataObject + "</li></ul><%")
                nodes.Add(New TreeViewItem With {.Text = "<span style='font-size:.9em;'>" + ugRptType.key + " " + ugRptType.value + "</span>", .Value = ugRptType.dataTag, .Encoded = False, .Content = Function() taskInfo})
            Next
        End If
        Return New JsonResult With {.Data = nodes}
    Catch
        Return View("Error")
    End Try
End Function

[Atanas Korchev]

Hello Donna Stewart,

 Both are not supported. Only the currently expanded node is being send to the action method. Also modifying the expanding node has no effect. You can only return child nodes.

Regards,
Atanas Korchev
the Telerik team

[Donna Stewart]

Hi,

Thank you for your response.  First of all, is there any plan to add the functionality to get the Parent node in this scenario since you have it as a property on the TreeViewItem?  Second, I am not trying to modify the expanding node.  I am trying to set content on the new child nodes -

                nodes.Add(New TreeViewItem With {.Text = "<span style='font-size:.9em;'>" + ugRptType.key + " " + ugRptType.value + "</span>", .Value = ugRptType.dataTag, .Encoded = False, .Content = Function() taskInfo})

However, since I can't get the parent node using on demand, then I will have to figure out another way to do what I am trying to do.

Thanks,
Donna

[Atanas Korchev]

Hello Donna Stewart,

 No, we currently don't plan to do that as we would have to submit the whole treeview then. If we provide the parent node we should provide the parent node's parent, sibling nodes etc.

Regards,
Atanas Korchev
the Telerik team