c#-winform-treeview-Tree-like model

TreeView-Tree Model

Using recursion to add data

Data into the TREEVIEW1.NODES.ADD ()

         Public Form3 ()        {            InitializeComponent ();             New TreeNode (" China ");             New TreeNode (" Beijing ");             New TreeNode (" Chaoyang District ");            T2. Nodes.Add (T3);            T1. Nodes.Add (T2);            TREEVIEW1.NODES.ADD (t1);        }

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The question is, where is the area code? --tag user-defined data associated with an object

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 Public Partial classForm3:form {List<China> alllist =NewList<china>();  PublicForm3 () {InitializeComponent (); Alllist=NewChinadata ().            Select (); TreeNode TN1=NewTreeNode ("China"); Tn1. Tag="0001";            Nodesbind (TN1);                    TREEVIEW1.NODES.ADD (TN1); }         Public voidNodesbind (TreeNode tn) {List<China> clist = alllist. Where (r = R.parentareacode = =TN. Tag.tostring ()).            ToList (); foreach(China Cinchclist) {TreeNode TNN=NewTreeNode (c.areaname); Tnn. Tag=C.areacode; //RecursiveNodesbind (TNN); Tn.            Nodes.Add (TNN); }        }    }

lambda expression-final code

c#-winform-treeview-Tree-like model