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RadTreeview save expanded state without session object

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TreeView

This is a migrated thread and some comments may be shown as answers.

Ramakrishna asked on 07 Jul 2014, 09:18 PM

radtree.jpg

I have a RadTree controls in a single page divided by tabs, 1st tab two radtrees, 2nd tab three, 3rd tab three.
Child nodes are expanding LoadOnDemand event.

I gonna maintain Tree view state(without session) though user refresh the page. If user expands parent node and press F5 button we have to show expanded nodes as it is.

Private Shared dictOriginTree As New Dictionary(Of String, Boolean)

Protected Sub rtvOriginTree_NodeExpand(sender As Object, e As RadTreeNodeEventArgs)
If Not dictOriginTree.ContainsKey(e.Node.UniqueID) Then
dictOriginTree.Add(e.Node.UniqueID, e.Node.Expanded)
End If
End Sub

Protected Sub ramMasterDocumentsAjaxManager_AjaxRequest(ByVal sender As Object, ByVal e As Telerik.Web.UI.AjaxRequestEventArgs)
Dim node As RadTreeNode
For Each node In rtvOriginTree.GetAllNodes()
If dictOriginTree.ContainsKey(node.UniqueID) Then
node.ExpandParentNodes()
node.ExpandChildNodes()
node.Expanded = dictOriginTree.Item(node.UniqueID.ToString())
node.ExpandMode = TreeNodeExpandMode.ServerSide
End If
Next
End Sub

8 Answers, 1 is accepted

answered on 10 Jul 2014, 01:45 PM

firsttab.png

secondtab.png

thirdtab.png

Hi Hristo,
Thank you very much for your reply.I gone through the Demo and saw the code but in the code Session object being used. My questions are
1) Is it possible without using Session
2) In my case i have total of 7 RadTreeView controls in a single page. So i should use 7 different Session objects ? Absolutely it will hit the performance.

I will attach screen shots.

Protected Sub SaveButton_Click(sender As Object, e As EventArgs)
Session("CustomPersistenceSettingsKey") = Me.Session.SessionID
Dim fileId As String = Session("CustomPersistenceSettingsKey").ToString()
LoadButton.Enabled = True
RadPersistenceManager1.StorageProviderKey = fileId
RadPersistenceManager1.SaveState()
End Sub

answered on 14 Jul 2014, 01:37 PM

Hi Hristo,
I tried several options but it didn't work. here is the code, could you help me out.
aspx code:
--------------
<telerik:RadPersistenceManager runat="server" ID="RadPersistenceManager1">
<PersistenceSettings>
<telerik:PersistenceSetting ControlID="rtvOriginTree" />
</PersistenceSettings>
</telerik:RadPersistenceManager>
<telerik:RadTreeView ID="rtvOriginTree" runat="server" DataFieldID="ID" EnableDragAndDrop="true" OnNodeExpand="rtvOriginTree_NodeExpand"
DataFieldParentID="ParentID" DataTextField="NodeText" DataValueField="ID" OnClientContextMenuShowing="onClientContextMenuShowing"
OnClientContextMenuItemClicked="OnClientContextMenuItemClicked_P1" OnClientNodeClicking="ClientNodeClicking_OD"
OnSaveCustomSettings="rtvOriginTree_SaveCustomSettings" OnLoadCustomSettings="rtvOriginTree_LoadCustomSettings"
Skin="Windows7" Style="white-space: normal;" ShowLineImages="false">
</telerik:RadTreeView>

VB Code:
--------

Protected Sub rtvOriginTree_SaveCustomSettings(sender As Object, e As Telerik.Web.UI.PersistenceManagerSaveStateEventArgs)
e.CustomSettings.Add(New Telerik.Web.UI.ControlSetting() With { _
.Name = "pos", _
.Value = wndStateHolder.Value _
})
End Sub

Protected Sub rtvOriginTree_NodeExpand(sender As Object, e As RadTreeNodeEventArgs)
RadPersistenceManager1.StorageProviderKey = CurrentSession.UserId.ToString()
RadPersistenceManager1.SaveState()
End Sub

answered on 14 Jul 2014, 03:26 PM

yup, i could see a file in App_Data. but not sure how to restore data.
<?xml version="1.0"?>
<ArrayOfRadControlState xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<RadControlState>
<ControlSettings />
<UniqueId>Telerik.Web.UI_PersistanceManager_CustomSettings</UniqueId>
</RadControlState>
<RadControlState>
<ControlSettings>
<ControlSetting>
<Name>CheckedIndices</Name>
<Value Type="System.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]">
<ArrayOfString />
</Value>
</ControlSetting>
<ControlSetting>
<Name>ExpandedIndices</Name>
<Value Type="System.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]">
<ArrayOfString>
<string>0</string>
<string>0:1</string>
</ArrayOfString>
</Value>
</ControlSetting>
<ControlSetting>
<Name>SelectedIndices</Name>
<Value Type="System.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]">
<ArrayOfString>
<string>0:2</string>
</ArrayOfString>
</Value>
</ControlSetting>
</ControlSettings>
<UniqueId>ctl00$BodyContentPlaceholder$rtvOriginTree</UniqueId>
</RadControlState>
</ArrayOfRadControlState>