TreeView简单的动态加载数据

简单的小记录，省得去看控件属性详情了，基本常用的属于就几个

先是判断根节点是否存在控件中，如果不存在则创建，之前要添加了节点同样的方法

把根节点传到子节点的方法中，再判断是否在根节点里存在子节点，如果不存在则创建，

最后利用控件的双击事件获取当前选中的节点的内容。

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.Text.RegularExpressions;
 using DotNet4.Utilities;
 using System.Threading;

 namespace TreeviewDome
 {
     public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
         }

         private void button1_Click(object sender, EventArgs e)
         {
             Thread t = new Thread(ThreadProcessUrl);
             t.IsBackground = true;
             t.Start();
         }

         /// <summary>
         /// 根据页数生成Url
         /// </summary>
         private void ThreadProcessUrl()
         {
             int page = Convert.ToInt32(txtPages.Text);
             )
             {
                 ; i <= page; i++)
                 {
                     string address = string.Format(txtUrl.Text, i);
                     GetHtml(address);
                 }
             }
             else
             {
                 GetHtml(txtUrl.Text);
             }
         }

         /// <summary>
         /// 批量下载网页处理链接
         /// </summary>
         /// <param name="urls">传入Url</param>
         public void GetHtml(string urls)
         {
             HttpHelper http = new HttpHelper();
             HttpItem item = new HttpItem();
             item.URL = urls;
             HttpResult result = http.GetHtml(item);
             string html = result.Html;
             Regex r = new Regex("(?<=<span class=\"n-img\"><a href=\").*?(?=\")");
             MatchCollection m = r.Matches(html);
             if (!tvUrlList.Nodes.ContainsKey(urls)) //判断是否存在节点，不存在则创建
             {
                 TreeNode root = new TreeNode(urls); //创建根节点
                 this.Invoke(new Action(delegate
                     {
                         tvUrlList.Nodes.Add(root);
                     }));

                 foreach (Match mh in m)
                 {
                     TreeNode node = new TreeNode(mh.Value);
                     if (!root.Nodes.ContainsKey(mh.Value)) //判断根节点是否存在子节点，不存在则创建
                     {
                         this.Invoke(new Action(delegate
                             {
                                 root.Nodes.Add(node); //在根节点下添加子节点
                             }));
                     }
                 }
             }

         }

         /// <summary>
         /// 双击选中节点处理
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
         {
             //获取被单击的节点
             TreeNode tn = e.Node;
             string ss=tvUrlList.TopNode.Text;
             if (tn.Text ==ss)
             {
                 MessageBox.Show("这个是不想要的");
             }
             else
             {
                 MessageBox.Show("当前选中的是:"+tn.Text);
             }
         }
     }
 }

下载：https://files.cnblogs.com/files/ncle/TreeviewDome.rar