正则爬取天气预报获取

自己做了个Demo，实现天气预报信息的抓取。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            MatchTest();
        }
       
        public class weather
        {
            /// <summary>
            /// 时间
            /// </summary>
            public string date { get; set; }
            /// <summary>
            /// 天气情况
            /// </summary>
            public string wea { get; set; }
            /// <summary>
            /// 温度
            /// </summary>
            public string temp { get; set; }

        }
        public void MatchTest()
        {
            string url = "http://www.weather.com.cn/weather/101210101.shtml";
            try
            {
                HttpWebRequest wrqContent = (HttpWebRequest)WebRequest.Create(url);  
                wrqContent.Timeout = 300000;
                var wrpContent = (HttpWebResponse)wrqContent.GetResponse();
                if (wrpContent != null)  
                {
                    var strReader = new StreamReader(wrpContent.GetResponseStream(), Encoding.GetEncoding("utf-8"));
                    string strHtml =strReader.ReadToEnd();
                    string re= @"(?<=(<ul class=""t clearfix"">)).*?(?=</ul>)";
                    MatchCollection result = Regex.Matches(strHtml.Replace('\r', ' ').Replace('\n', ' ').Trim(), re, RegexOptions.IgnoreCase | RegexOptions.Multiline);
                    List<weather> lisWea = new List<weather>();
                    foreach (Match item in result)
                    {
                        string sTempRe = @"(?<=<li class=""sky skyid lv[2|3]( on)?"">).*?(?=</li>)";
                        var tdMatchs = Regex.Matches(item.Value, sTempRe, RegexOptions.IgnoreCase | RegexOptions.Multiline);
                        foreach (Match item2 in tdMatchs)
                        {
                            if (string.IsNullOrEmpty(item2.Value.Trim())) { continue; }
                            string sTempRe2 = @"(?is)(?<=(<*>))[^<>]*(?=(</))";
                            var tdMatchs2 = Regex.Matches(item2.Value, sTempRe2, RegexOptions.IgnoreCase | RegexOptions.Multiline);
                            if(tdMatchs2.Count>0)
                            {
                                weather weath = new weather()
                                {
                                    date = tdMatchs2[0].Groups[0].Value,
                                    wea = tdMatchs2[3].Groups[0].Value,
                                    temp = tdMatchs2[4].Groups[0].Value +"/"+ tdMatchs2[5].Groups[0].Value,
                                };
                                lisWea.Add(weath);
                            }
                            
                        }
                    }
                    if(lisWea.Count>0)
                    {
                        lblMatchTest.Text = null;
                        foreach (var item in lisWea)
                        {
                            lblMatchTest.Text += (item.date + "  " + item.wea + "  " + item.temp+"\n");
                        }
                    }
                }  
            }
            catch (Exception e)
            {
                throw(e);
            }
        }

    
    }
}