C# 遍历TreeView所有节点

public void PrintTreeViewNode(TreeNodeCollection node)

        {

            foreach (TreeNode n in node)

            {

                Response.Write(n.Text+",");

                PrintTreeViewNode(n.ChildNodes);

            }

        }

调用  PrintTreeViewNode(TreeView1.Nodes);
 
//////////////////////////////////////////////////////////////////
private void button1_Click(object sender, EventArgs e)

 
      {

           label1.Text = string.Empty;

           #region 递归

           //1.获取TreeView的所有根节点

           foreach (TreeNode tn in treeView1.Nodes)

           {

               DiGui(tn);

           }

           #endregion

          

       }

       private void DiGui(TreeNode tn)

       {

           //1.将当前节点显示到lable上

           label1.Text += "aaa" +"    " + tn.Text+ "\r\n";

           foreach (TreeNode tnSub in tn.Nodes)

           {

               DiGui(tnSub);

treeView1.SelectedNode = tnSub;    //设置节点

           }

       }