ASP.NET过滤HTML标签只保留换行与空格的方法

本文实例讲述了ASP.NET过滤HTML标签只保留换行与空格的方法。分享给大家供大家参考。具体分析如下:

自己从网上找了一个过滤HTML标签的方法,我也不知道谁的才是原创的,反正很多都一样。我把那方法复制下来,代码如下:

///   <summary>

///   去除HTML标记

///   </summary>

///   <param name="NoHTML">包括HTML的源码   </param>

///   <returns>已经去除后的文字</returns>

public static string NoHTML(string Htmlstring)

{

  //删除脚本

  Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "",

    RegexOptions.IgnoreCase);

  //删除HTML

  Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", "   ",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9",

    RegexOptions.IgnoreCase);

  Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "",

    RegexOptions.IgnoreCase);

  Htmlstring.Replace("<", "");

  Htmlstring.Replace(">", "");

  Htmlstring.Replace("\r\n", "");

  Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

  return Htmlstring;

}

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