Dynamic ComboBox with Treeview

[Paul]

I need to build a RadComboBox containing a RadTreeView dynamically in the codebehind with nothing more than a placeholder on the aspx page. I am easily able to do one or the other, but combining the two seems to be a bit trickier. Has anyone attempted this before? Any examples if it can be done would be greatly appreciated.

Thanks!

Paul

[Shinu]

Hi Paul,

Check out the demo link given below.
TreeView in ComboBox

Shinu.

[Paul]

Hi Shinu,

Thanks for the reply. I've seen that example and unfortunately that's not what I need. I need to build the ComboBox/TreeView entirely in the codebehind, not in the aspx page as the sample you sent shows.

Or if not possible, a way to add a treeview  to a combobox dynamically would work as well (all the clientside javacript needed on the aspx page doesn't need to be added dynamically)

Thanks,

Paul

[Veselin Vasilev]

Hi Paul,

Have you checked the article about adding templates at runtime? You can find it here:
http://www.telerik.com/help/aspnet-ajax/combo_templatesaddingtemplates.html
Scroll down to find how to add templates at runtime.

Let me know if you have additional questions.

Regards,
Veskoni
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[MrHoso]

Hi Paul,

If you want to add RadTreeView, firstly you must define a class that implements the ITemplate interface

    Public Class RadComboboxTreeView
        Implements System.Web.UI.ITemplate
        Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) Implements System.Web.UI.ITemplate.InstantiateIn
            Dim rTree As Telerik.Web.UI.RadTreeView = New Telerik.Web.UI.RadTreeView
            rTree.CheckBoxes = True
            Dim pNode As Telerik.Web.UI.RadTreeNode = New Telerik.Web.UI.RadTreeNode("Item")
            pNode.Expanded = True
            For i As Integer = 1 To 6
                pNode.Nodes.Add(New Telerik.Web.UI.RadTreeNode("Item " & i, i))
            Next
            rTree.Nodes.Add(pNode)
            container.Controls.Add(rTree)
        End Sub
    End Class

and then you can add treeview to combobox like that

Dim ddl As Telerik.Web.UI.RadComboBox = New Telerik.Web.UI.RadComboBox
ddl.ID = "ddl"
ddl.ItemTemplate = New PI.RadComboboxTreeView(repObj, PI.Utility.AppSkin, ID)
ddl.Items.Add(New Telerik.Web.UI.RadComboBoxItem())
Page.Form.Controls.Add(ddl)

I hope it can help you,

Regards

Ahmet HOSO

[JARROD R]

Is there anyway to do this with a treeview that will Load on Demand?

Our application has a page that could have 3 of these treeview/comboBox controls, but there is the possibility that the treeviews could have a lot of nodes.  There would be too much information to be loaded at one time. 

I tried to to create a load on demand, but the combobox closes every time the server is called.  Any suggestions?

Thanks

[Veselin Vasilev]

Hi JARROD RUEZ,

You can check this code library: Load on demand TreeView in Combobox

I hope this helps.

Greetings,
Veskoni
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center