搜索之路 c#从html中提取文本

直接封装成一个类的，用起来还挺方便的
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text.RegularExpressions;
/// <summary>
/// HtmlExtract 抽取html里面的文本信息
/// </summary>
public class HtmlExtract
{
   
        #region private attributes
        private string _strHtml;
        #endregion
        #region public mehtods
         public HtmlExtract(string inStrHtml)
        { _strHtml = inStrHtml;}
        public string ExtractText()
        {
            string result = _strHtml;
            result = RemoveComment(result);
            result = RemoveScript(result);
            result = RemoveStyle(result);
            result = RemoveTags(result);
            return result.Trim();
        }
        #endregion
     #region private methods
       private string RemoveComment(string input)
{
string result = input;
//remove comment
result = Regex.Replace(result, @"<!--[^-]*-->", string.Empty, RegexOptions.IgnoreCase);
return result;
}