Create a virtual level in treeview

[Deltaohm]

Hi

I have a model class that it is in the form

Class A
{
	public List<B> B {get;set;}
	public List<C> C {get;set;}
}

And I would build a treeview with a list of A: A1, A2 in this way:

A1
	Objects of type B
		B1
		B2
	Objects of type C
		C1
		C2
A2
	Objects of type B
		B3
		B4
	Objects of type C
		C3
		C4

But the second level is missing in the model class (we can see it as a "virtual level"). Is there a way to add the level directly in xaml (the number and the tags of the elements are fixed by design).

Thank you

Luigi

[Petar Mladenov]

Hi Luigi,

The best way to handle such scenarios is to introduce additional ViewModels and build hierarchy of such viewmodels to replicate what you need to display as hirarchy in the UI. Ofr example if your models are A which is parent of Bs and Cs, you can create ViewModelA which is parent of ViewModelBBase and ViewModelCBase, then ViewModelBBAse is parent of ViewModelB and etc. This way the hierarchy ViewModelA-ViewModelBBAse-ViewModelB is eaasy to bind in the UI with chain of HierarchicalDataTemplates/HierarchicalDataTemplateSelectors.

Regards,
Petar Mladenov
Progress Telerik