using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Text;

 using System.Text.RegularExpressions;

 using System.Threading.Tasks;

 namespace ResolveHtmlText

 {

     class Program

     {

         static void Main(string[] args)

         {

             string text = @"&nbsp;<span style='color:#1F497D'><span>y<span></span>&nbsp; &nbsp;<span style='color:#1F497D;'>1</span>&nbsp;<span style='color:#1F497D;background-color:#123456'>2</span><span style='color:#1F497D;background-color:#123456;text-align:center'>3</span>  <span style='color:#1F497D;background-color:#123456;text-align:center;'>4</span> <span style='color:#1F497D;background-color:#123456;text-align:center;tt-l: 134;'>5</span>ggjf<a>123456</a>";

             Console.WriteLine("原字符串:" + text);

             text = text.Replace("\"", "'");

             text = text.Replace("&quot;", "'");

             text = text.Replace("&nbsp;", "");

             text = text.Replace("&lt;", "<");//将<的转义码&lt;都替换成<

             text = text.Replace("&gt;", ">");//将>的转义码&gt;都替换成>

             //string matchStr = @"<\s*[a-zA-Z0-9]+\s*>[^<^>]*<\s*/\s*[a-zA-Z0-9]+\s*>";

             string matchStr = @"<\s*[a-zA-Z0-9]+\s*[a-zA-Z]+\s*=\s*'\s*[a-zA-Z]"

                             + @"+\s*:\s*[^<^>];?'\s*>[^<^>]"

                             + @"*<\s*/\s*[a-zA-Z0-9]+\s*>|<\s*[a-zA-Z0-9]"

                             + @"+\s*(\s*[a-zA-Z-]+\s*=\s*'(\s*[a-zA-Z-]+\s*:"

                             + @"\s*[^:^;^<^>]+\s*;\s*)*(\s*[a-zA-Z-]+\s*:\s*"

                             + @"[^:^;^<^>]+\s*)\s*;?\s*'\s*)*"

                             + @"\s*>[^<^>]*<\s*/\s*[a-zA-Z0-9]+\s*>";

             Regex htmlReg = new Regex(matchStr);

             string result = null;

             MatchCollection htmlMatchCollection = htmlReg.Matches(text);

             StringBuilder sb = new StringBuilder();

             foreach (Match m in htmlMatchCollection)

             {

                 if (m != null && m.Groups != null && m.Groups.Count > )

                 {

                     string temp = m.Groups[].Value;

                     Console.WriteLine("临时值:" + temp);

                     //Regex textReg1 = new Regex(@"[^<^>]+");

                     //Match textMatch1 = textReg1.Match(temp);

                     //if (textMatch1 != null && textMatch1.Groups != null && textMatch1.Groups.Count > 0)

                     //{

                     //    result = textMatch1.Groups[0].Value;

                     //    sb.Append(result);

                     //}

                     Regex textReg = new Regex(@">.+<");

                     Match textMatch = textReg.Match(temp);

                     if (textMatch != null && textMatch.Groups != null && textMatch.Groups.Count > )

                     {

                         result = textMatch.Groups[].Value;

                         if (result.Length > )

                         {

                             result = result.Substring(, result.Length - );

                             sb.Append(result);

                         }

                     }

                 }

             }

             Console.WriteLine("解析出的结果:" + sb.ToString());

             Console.ReadLine();

         }

     }

 }