asp.net过滤HTML标签的几个函数

2022-01-03 08:31:15

以下是引用片段：

　　-----

/**/

///   <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;

}

/**/ ///提取HTML代码中文字的C#函数

///   <summary>

///   去除HTML标记

///   </summary>

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

///   <returns>已经去除后的文字</returns>

using System;

using System.Text.RegularExpressions;

public class StripHTMLTest

{

  public static void Main()

  {

    string s = StripHTML(

      "<HTML><HEAD><TITLE>中国石龙信息平台</TITLE></HEAD><BODY>faddfs龙信息平台</BODY></HTML>");

    Console.WriteLine(s);

  }

  public static string StripHTML(string strHtml)

  {

    string[]aryReg =

    {

      @"<script[^>]*?>.*?</script>",

      @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(\\["

        "'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>", @"([\r\n])[\s]+", @

        "&(quot|#34);", @"&(amp|#38);", @"&(lt|#60);", @"&(gt|#62);", @

        "&(nbsp|#160);", @"&(iexcl|#161);", @"&(cent|#162);", @"&(pound|#163);",

        @"&(copy|#169);", @"&#(\d+);", @"-->", @"<!--.*\n"

    };

    string[]aryRep =

    {

      "", "", "", "\"", "&", "<", ">", "   ", "\xa1",  //chr(161),

      "\xa2",  //chr(162),

      "\xa3",  //chr(163),

      "\xa9",  //chr(169),

      "", "\r\n", ""

    };

    string newReg = aryReg[];

    string strOutput = strHtml;

    for (int i = ; i < aryReg.Length; i++)

    {

      Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase);

      strOutput = regex.Replace(strOutput, aryRep[i]);

    }

    strOutput.Replace("<", "");

    strOutput.Replace(">", "");

    strOutput.Replace("\r\n", "");

    return strOutput;

  }

}

写一个静态方法移除HTML标签

#region

///移除HTML标签

 /**/ ///   <summary>

///   移除HTML标签

///   </summary>

///   <param   name="HTMLStr">HTMLStr</param>

public static string ParseTags(string HTMLStr)

{

  return System.Text.RegularExpressions.Regex.Replace(HTMLStr, "<[^>]*>", "");

}

#endregion

///   取出文本中的图片地址

#region

///   取出文本中的图片地址

 /**/ ///   <summary>

///   取出文本中的图片地址

///   </summary>

///   <param   name="HTMLStr">HTMLStr</param>

public static string GetImgUrl(string HTMLStr)

{

  string str = string.Empty;

  string sPattern = @"^<img\s+[^>]*>";

  Regex r = new Regex(@"<img\s+[^>]*\s*src\s*=\s*([']?)(?<url>\S+)'?[^>]*>",

    RegexOptions.Compiled);

  Match m = r.Match(HTMLStr.ToLower());

  if (m.Success)

    str = m.Result("${url}");

  return str;

}

#endregion

本文来源：IT传媒网

原文链接：http://www.cniter.com/tech/asp.net/csharp/remove_html_tag_10806_1.html

以下是引用片段：　　-----/**//// <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, @"", @"<!--.*\n" };
string[]aryRep = { "", "", "", "\"", "&", "<", ">", " ", "\xa1", //chr(161), "\xa2", //chr(162), "\xa3", //chr(163), "\xa9", //chr(169), "", "\r\n", "" };
string newReg = aryReg[0]; string strOutput = strHtml; for (int i = 0; i < aryReg.Length; i++) { Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase); strOutput = regex.Replace(strOutput, aryRep[i]); } strOutput.Replace("<", ""); strOutput.Replace(">", ""); strOutput.Replace("\r\n", ""); return strOutput; }}
写一个静态方法移除HTML标签#region///移除HTML标签 /**/ /// <summary>/// 移除HTML标签/// </summary>/// <param name="HTMLStr">HTMLStr</param>public static string ParseTags(string HTMLStr){ return System.Text.RegularExpressions.Regex.Replace(HTMLStr, "<[^>]*>", "");}
#endregion /// 取出文本中的图片地址#region/// 取出文本中的图片地址 /**/ /// <summary>/// 取出文本中的图片地址/// </summary>/// <param name="HTMLStr">HTMLStr</param>public static string GetImgUrl(string HTMLStr){ string str = string.Empty; string sPattern = @"^<img\s+[^>]*>"; Regex r = new Regex(@"<img\s+[^>]*\s*src\s*=\s*([']?)(?<url>\S+)'?[^>]*>", RegexOptions.Compiled); Match m = r.Match(HTMLStr.ToLower()); if (m.Success) str = m.Result("${url}"); return str;}
#endregion

本文来源：IT传媒网原文链接：http://www.cniter.com/tech/asp.net/csharp/remove_html_tag_10806_1.html

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