Loop recursion + return value (treeview example)

Example: Get all node of the TreeView, save to List<treenode>, and encapsulate to the generic tool class:

Method One: Empty the static type list before using the static method, property---Call

1          Public StaticList<treenode> allnodes =NULL;2          Public Static voidgettreeviewallnodes (treenodecollection Nodes)3         {4             foreach(TreeNode nodeinchNodes)5             {6 allnodes.add (node);7                 if(node. Childnodes.count >0)8                 {9 gettreeviewallnodes (node. ChildNodes);Ten                 } One             } A         } -          Public StaticList<treenode>getnodes (TreeView TV) -         { the gettreeviewallnodes (TV. Nodes); -             returnAllnodes; -}
Note: If you use a static type list, you need to empty the list<treenode&gt before calling the generic tool class, otherwise the overlay will appear. In the constructor, empty:

 Public Tools () {      allnodes.clear ();   }

Method Two, use the internal method, the property---call directly

1          PublicList<treenode> allnodes =NewList<treenode>();2          Public voidgettreeviewallnodes (treenodecollection Nodes)3         {4             foreach(TreeNode nodeinchNodes)5             {6 allnodes.add (node);7                 if(node. Childnodes.count >0)8                 {9 gettreeviewallnodes (node. ChildNodes);Ten                 } One             } A         } -          PublicList<treenode>getnodes (TreeView TV) -         { the gettreeviewallnodes (TV. Nodes); -             returnAllnodes; -}

Question: Can you use a method to both iterate and get the return value???

Loop recursion + return value (treeview example)