带搜索功能，支持绑定对象到节点的TreeView辅助类

 1         private void button1_Click(object sender, EventArgs e)
 2         {//载入文档
 3             s = new SearchTree<DsTest>(); 
 4             s.load_form_xml(@"XMLFile1.xml");
 5             treeView1.Nodes.Add(s.convert_to_tree(true));
 6             treeView1.ExpandAll();
 7         }
 8 
 9         private void button2_Click(object sender, EventArgs e)
10         {//搜索
11             string rule = textBox1.Text;
12             s.hide_nodes_illegal(rule);
13             treeView1.Nodes.Clear();
14             treeView1.Nodes.Add(s.convert_to_tree(true));
15             treeView1.ExpandAll();
16         }
17 
18         private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
19         {//绑定对象获取
20             DsTest ds;
21             if (s.get_Info_by_name(e.Node.Name, out ds))
22             {
23                 label1.Text = "选中的节点的id是："+ e.Node.Name;
24                 label2.Text = "选中节点绑定的数据结构的值是："+ ds.value;
25             }
26             
27         }