C#获取网页信息并存入数据库

using Skay.WebBot;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using Ivony.Html;
using Ivony.Html.Parser;
using System.Data.SqlClient;

namespace catchGoods
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public static Thread th;
        private void button1_Click(object sender, EventArgs e)
        {
            th = new Thread(GetJDData);
            th.Start();
         }
        public void GetJDData()
        {
            SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=StuTinafirst;User ID=sa;Password=123456");
            conn.Open();

            string str = "http://www.htluxe.com";
            HttpUtility http = new HttpUtility();
            string html = http.GetHtmlText(str);
            var documenthtml = new JumonyParser().Parse(html);
            var items = documenthtml.Find(".categroup dl");
            foreach(var item in items)
            {
                string name = item.FindFirst("h4 a").InnerText();
                string remarkOdd = item.FindFirst("h4 a").Attribute("href").Value();
                string remark = remarkOdd.Split(‘=‘)[1];
                this.Invoke((EventHandler)(delegate
                {
                    listBox1.Items.Add(name);

                }));//有线程时listbox添加东西的时候要这么写不然报错谁知道什么鬼（委托？
                string into = string.Format("insert into exerciseOneSort (className, remark) values (‘" + name + "‘, ‘" + remark + "‘)");
                SqlCommand com = new SqlCommand(into, conn);
                int i = com.ExecuteNonQuery();

                var elements = item.Find("dt p a");
                foreach(var element in elements)
                {
                    string nameTwo = element.InnerText();
                    string url = "http://www.htluxe.com/" + element.Attribute("href").Value();
                    string intoTwo = string.Format("insert into exerciseTwoSort (className, url, idplus) values (‘" + nameTwo + "‘, ‘" + url + "‘, ‘" + remark + "‘)");
                    SqlCommand comTwo = new SqlCommand(intoTwo, conn);
                    int j = comTwo.ExecuteNonQuery();
                }
            }
        }
    }
}