Getting the treeviewItem on the RightClick of Mouse On WPF treeView

Right clicking the mouse on a TreeView does not select a node therefore there is no "node" to select. You can get the currently selected node within the event handler by casting the 'sender' parameter to a TreeView object then using the SelectedItem property (which returns the node object that is selected) or the SelectedItemPath to walk the control hierarchy and get the selected node. But I'm guessing that isn't what you want.

Unfortunately, the TV control doesn't readily return the node that a user right-clicks on... the sender is the TreeView and I believe the e.OriginalSource property also returns the TreeView (going from memory here...) I used a workaround that relied on the Mouse.DirectlyOver function in System.Windows.Input to return the UIElement the mouse is over. Assuming the mouse is over a TreeViewItem when the user right-clicked, you should be able to type-cast the returned UI element to a TreeViewItem in a Try..Catch block. If successful, you know the user was over a TVI element and now you have a reference to it. If you end up in the catch after the type-cast, you know the mouse was over something else when right-clicked. Of course, if you have other UI elements over the treeview, like panels or busy indicators, they must be set to collapsed rather than just transparent. Otherwise you will get them because they are higher in the Z-Order.

HTH