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RadTreeView save expanded state

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TreeView

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34 Answers, 1 is accepted

answered on 12 Aug 2008, 07:34 AM

Hi Ryan,

How exactly did you use the Session variable?
You can store the state of the treeview in the session like this:

    
            Session["myTreeView"] = RadTreeView1.GetXml();

and later restore the treeview state from that session variable:

    
            string treeViewState = (string)Session["treeViewState"];  
        
            RadTreeView1.LoadXmlString(treeViewState);

I hope this will get you started.

Sincerely yours,
Veskoni
the Telerik team

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answered on 15 Aug 2008, 01:30 PM

Hi Ryan,

I guess you need to use a navigation control like LinkButton that will perform a postback on click and navigate after that:

    
            asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">Click Here to navigate</asp:LinkButton>

    
                protected void LinkButton1_Click(object sender, EventArgs e)  
        
                {  
        
                    //save the session. Alternatively you can save the XML string in a temporary table in the DB  
        
                    Session["myTreeView"] = RadTreeView1.GetXml();   
        
                    //navigate  
        
                    Response.Redirect("...");  
        
                }

I hope this helps.

Greetings,
Veskoni
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

answered on 20 Aug 2008, 01:26 PM

I am kind of confused at how to implement that concept. Here is what i tried in 1.1 and it worked.

<radT:RadTreeView id="RadTreeView1" BeforeClientClick="BeforeClickHandler" runat="server" NodeCssClassSelect=" "
                            NodeCssClassOver=" " NodeCssClassEdit=" " NodeCssClassDisable=" " NodeCssClass=" " Skin="TSA"></radT:RadTreeView>
                        <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
                        </telerik:RadScriptManager>
                        <telerik:RadAjaxManager ID="RadAjaxManager1" OnAjaxRequest="RadAjaxManager1_AjaxRequest" runat="server">
                        </telerik:RadAjaxManager>

                            <telerik:AjaxSetting_AjaxControlID="RADAJAXMANAGER1"></TELERIK:AJAXSETTING>

                            <script language="JavaScript" type="text/javascript">
                            function BeforeClickHandler()
                            {
                            
                            }
                            </script>

But now in 2.0 it hangs with this error upon clicking a node to be redirected Microsoft JScript runtime error: Object doesn't support this property or method
and it is referring to the RadAjaxManager1.AjaxRequest(); call. Any ideas?

answered on 20 Aug 2008, 03:39 PM

now i get this error '~/Telerik.Web.UI.WebResource.axd' is missing in web.config. RadScriptManager requires a HttpHandler registration in web.config. Please, use the control Smart Tag to add the handler automatically, or see the help for more information: Controls > RadScriptManager

yet in my web.config file this is what i have

<httpHandlers>
      <remove path="*.asmx" verb="*"/>
      <add path="*.asmx" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
      <add path="*_AppService.axd" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
      <add path="ScriptResource.axd" verb="GET,HEAD" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
      <add path="*.asbx" verb="GET,HEAD,POST" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
      <add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource, Telerik.Web.UI, Version=2008.2.723.20, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false"/>
      <remove verb="*" path="*.asmx"/>
      <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
      <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
      <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
    </httpHandlers>

do you see anything wrong here?

answered on 07 Jul 2014, 09:00 PM

I need help please !
Stored expanded nodes in a Dictionary object and have to expand the parent and child nodes though page refresh happens.
Below is the code ... Child nodes are expanding in LoadOnDemand for the first time.
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

answered on 10 Jul 2014, 07:59 PM

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.

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 29 Aug 2014, 09:03 PM

I am sorry. I am new to this forum and cannot find how to create a new post. So, if you would be so kind to answer me in this thread.
My issue is very similar to what is discussed in this post. However, it has some peculiarities.I have to maintain an old application which uses RadTreeView. This RadTreeView is defined as a menu in a master page and repopulated in Page_Init event handler for the master page. I need to save the current expansion state of the tree and preserve it when the tree is recreated.

What makes my task difficult is that I do not have (or at least I do not know) an event when to catch and preserve the expansion status of the tree. When tree is collapsed and/or expanded in the browser, I do not get the post back to save the status. I cannot move the population of the tree from the master page Page_Init to Page_Load handler because it is used in Page_Load event of the content pages, which is triggered before Page_Load of the master page.

So, here is my question: how without changing user's experience (by introducing some bogus link buttons) capture RadTreeView expansion status?

answered on 03 Sep 2014, 03:58 PM

Hi Richard,

The PersistenceFramework is a server control and to use it you will have to make a full post back or at least an ajax call. It is possible to store the expanded and selected nodes in a cookie without making any postbacks. You will have to handle the OnClientNodeExpanded and OnClientNodeSelected events. In these events save the data you need in a cookie. This way you will always have the latest changes.

Finally after you have selected and expanded nodes you will have to restore them somehow. This can be done in the pageLoad event.

function pageLoad() {

//Restore tree state from the cookie

}

I hope this helps.

Regards,
Hristo Valyavicharski
Telerik

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

answered on 24 Sep 2014, 11:35 AM

Hi Richard,

I would suggest that you try the following approach:

Enable the menu selection:

<telerik:RadMenu runat="server" EnableSelection="true" ID="RadMenu1">
In the cookie store the item's text or value.
Use menu client api to find and select the item you want:

function restoreSelectedItem() {

    //...

    var menu = $find('RadMenu1');

    var item = menu.findItemByText("Home");

    if (item != null) {

        item.select();

    }

}

I hope this helps.

Regards,
Hristo Valyavicharski
Telerik

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

answered on 27 Apr 2016, 02:54 PM

imag.png

I have project to select from radtreeview and save in database, but the save button not working to save in sql server

I have role table, operation table and roleoperation table after check box from treeview and click save button in roleoperation table

but save button can not save from treeview.

see some image.

answered on 27 Apr 2016, 03:01 PM

imag.png

Hi Dear all,

Please help me I am tired to search and not get the solution.
I have project to select from radtreeview and save in database, but the save button not working to save in sql server
I have role table, operation table and roleoperation table after check box from treeview and click save button in roleoperation table
but save button can not save from treeview.

or can contact by email: hana_alamri@yahoo.com
see some image.