WinForm TreeView递归加载

 1 public partial class Form1 : Form
 2     {
 3         List<China> Chlist = new List<China>();
 4         public Form1()
 5         {
 6             InitializeComponent();
 7             Chlist = new ChinaData().Select();
 8             TreeNode tn1 = new TreeNode("中国");
 9             tn1.Tag = "0001";
10             NodesBind(tn1);
11             treeView1.Nodes.Add(tn1);
12         }
13         public void NodesBind(TreeNode tn)
14         {
15             //lambda 表达式
16             List<China> clist = Chlist.Where(a=>a.ParentAreaCode==tn.Tag.ToString()).ToList();
17             foreach (China c in clist)
18             {
19                 TreeNode tnn = new TreeNode(c.AreaName);
20                 tnn.Tag =c.AreaCode;
21                 NodesBind(tnn);//递归
22                 tn.Nodes.Add(tnn);
23             }
24          }
25     }