Customizing the TreeView to allow multi select.

Question

The built-in WPF TreeView control does not allow for multi selection, like a ListBox does. How can I customize the TreeView to allow for multi selection without rewriting it.

Answer 1

I highly recommend Josh Smiths article on codeproject: Simplifying the WPF TreeView by Using the ViewModel Pattern

While his article doesn't cover multi select features it provides a great way of dealing with a TreeView in WPF.

There also seems to be another article that discusses an approach for a multi select TreeView here

Answer 2

Another CodeProject project that more addresses your question more directly is this one: WPF MultiSelect TreeView Sample.

Answer 3

I've written a blog post on this topic,

Implementing Multi Select behavior on the WPF Tree View Control

Answer 4

When I consider overriding the fundamental behavior of a control, like a treeview, I always like to consider the usability and effort associated with my decision.

In the specific case of a treeview I find that switching to a listview in combination with zero, one, or more controls makes for a more usable solution that often is easier to implement.

As an example, consider the common Open dialog, or Windows Explorer application.

Answer 5

You can also find a Multiple Selection View Control here: http://dotnetlearning.wordpress.com/2010/10/14/multi-selection-tree-view/