Generate radtreeview dynamically

[Senthil ramna]

How do i generate a radtree view dynamically, i am using a masterpage in the page that i am trying to achieve this, also kindly let me know if i have to make any other changes if i am trying to achieve this if i am doing this in a Usercontrol.

protected void Page_Load(object sender, EventArgs e)
    {
      if (!IsPostBack)
        {
            RadTreeView testTree = new RadTreeView();
            testTree.ID = "testTree";
            RadTreeNode node1 = new RadTreeNode();
            node1.Text = "Project";
            node1.Expanded = true;
            Image img1 = new Image();
            img1.ImageUrl = "~/images/top1.gif";
            node1.Controls.Add(img1);

            RadTreeNode node2 = new RadTreeNode();
            node2.Text = "Process";
            Label lblprocess = new Label();
            lblprocess.Text = "MisTesting";
            node2.Controls.Add(lblprocess);

            this.Controls.Add(testTree);
        }
    }

please let me know if i am going wrong somewhere...

[Shinu]

Hello Senthil,


I believe you are in right direction. And the only change that I made is adding the control to a container (PlaceHolder/Form/Panel etc) and adding the nodes to Treeview (I guess you missed adding nodes to treeview).
Add/Remove/Disable Nodes



-Shinu.

[Senthil ramna]

Thanks for the reply Shinu will add control to the place holder.
Also wanted to know if there is a property to keep the nodes expanded, like in ExpendDepth = FullyExpand.

[Yana]

Hi Senthil,

You can use ExpandAllNodes() method of the treeview for this.

Greetings,
Yana
the Telerik team

[Senthil ramna]

Thanks for the reply Yana.
With reference to this example http://demos.telerik.com/aspnet-ajax/treeview/examples/programming/loadondemandmodes/defaultcs.aspx
where should i call the method i.e. Radtreeview1.ExpandAllNodes()  because i am in a fix as, where to call it...

[Yana]

Hello Senthil,

This online demo shows different load-on-demand modes of the treeview - the goal is not to load the whole treeview at once, but only when the user expands certain nodes. There's no point to use load-on-demand when the treeview should be expanded on page load. Please explain in more details your requirements.

Regards,
Yana
the Telerik team

[Senthil ramna]

Thanks for your reply Yana, but i did not find the video link you suggested i refer to.
My requirement is that when the page loads, i want to keep all the nodes expanded.
The goal is to load the entire tree view at once with all the nodes expanded.
Please suggest whether this could be achieved.

[Yana]

Hello Senthil,

I'm sorry for not being clear enough.

I meant the same online demo that you referenced in your previous reply about load-on-demand modes  - http://demos.telerik.com/aspnet-ajax/treeview/examples/programming/loadondemandmodes/defaultcs.aspx
I wanted to explain that it's not suitable in your case.

You can use the approach shown in this example - bind the treeview to a datasource and use DataBindings to set Expanded property of all the nodes to true. Please try it and let us know the result.

Kind regards,
Yana
the Telerik team