asp.net过滤HTML标签的几个函数

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, @"<!--.*", "", 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[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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