[Solved] Problem with programmatically created treeview

[John]

Hi,
If I drag a treeview control onto my page and set the DataFieldParentID, I get the treeview correctly displaying with multi-levels of nodes/hierarchy.

However - if I try to create a treeView from my code like this:

            radTreeView.DataTextField = "CategoryName";
            radTreeView.DataValueField = "ID";
            radTreeView.DataFieldParentID = "ParentCategory";
            radTreeView.CheckBoxes = true;
            radTreeView.DataSource = myDataSource;
            radTreeView.DataBind();

            this.Controls.Add(radTreeView);

The treeview just displays all the nodes at the same, top level - so there's there's no tree to it. It seems to be ignoring the ParentCategory field that I bound to the DataFieldParentID property.

Any ideas? And also - As this is a dynamically created control, I'm having trouble picking up the selected nodes. I'm adding the control at OnInit and Viewstate is enabled. Is there anything I need to do?

Thanks.

[Veronica]

Hi John,

Thanks for you question.

As I take a look on your code it seems that DataFieldID property is missing.

Please take a look at this live demo about programmatic data binding.
If you still have questions please attach the full code.

Let me know if this was helpful.

Sincerely yours,
Veronica Milcheva
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[John]

Thanks - I'll try this.

And I figured out the issue with the selections not being picked up - I actually wanted to pickup checked items, not selected items - I only just realised that the 2 are different.

Thanks