c# - Get the Parent List in a TreeView -

my problem following: have treeview, bounded itemssource. selecteditem bound property in viewmodel called selecteditem.

the itemssource build like:

public class item {       public header { get; set; }       public observablecollection<item> itemchildren { get; set; } . . . } 

i want delete, reorder... items. need parent list of selecteditem this. research lists item, item can exists twice , separators item can null.

does knows how can parent list of selected item?

thank u much!

regards, kevin

if tree, don't need list of parents reference parent:

public class item {     public item()      {         _col = new observablecollection<item>();         _col.collectionchanged +=             new notifycollectionchanged(itemchildren_collectionchanged);     }      public header { get; set; }     public observablecollection<item> itemchildren     { { return _col; } }      public item parent { { return _parent; } }      private void itemchildren_collectionchanged(         object sender,         notifycollectionchangedeventargs e)     {         // newly added items: item._parent = this;         // removed items: item._parent = null;     }      private item _parent;     private observablecollection<item> _col;  } 

this solution more complex started with. parent object must track children , make sure child object's parent set every time when child added it.

i have been typing code without syntax checking, hits point. can find whole source code same question in article: how implement collection property contain unique objects.

edit: note item class in code above not allow callers set itemchildren collection. collection created , served item instance , nobody allowed change it. allowed add/remove items in it. 1 more thing way in item handles newly added child items - free throw invalidoperationexception if attempts add item non-null parent reference! ensure structure remains tree. example, xmlnode class (system.xml) throws invalidoperationexception appendchild method if argument ancestor of current node. possibilities endless when item has opportunity verify elements added it.