Drag-Drop in treeview, insert between nodes
During DragOver you can determine if your mouse position is above or below your TreeView Node with this method:
public static bool IsInFirstHalf(FrameworkElement container, Point mousePosition, Orientation orientation) { if (orientation == Orientation.Vertical) { return mousePosition.Y < container.ActualHeight / 2; } return mousePosition.X < container.ActualWidth / 2; }Then display an insertion adorner before/after your node.On Drop create a new node either before ( child of the parent node) or after ( sibling) the dropped on node.