从字符串包括：在C＃NBSP

Question

如何删除所有的HTML标签，包括在C＃中使用正则表达式& NBSP删除HTML标签。我的字符串看起来像

"<div>hello</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div>" 

Answer 1

如果你不能使用HTML解析器以过滤标签为主的解决方案，这是一个简单的正则表达式。

string noHTML = Regex.Replace(inputHTML, @"<[^>]+>|&nbsp;", "").Trim(); 

理论上，应该再拍该负责多个空格作为

string noHTMLNormalised = Regex.Replace(noHTML, @"\s{2,}", " "); 

Answer 2

这样的：

(<.+?> | &nbsp;) 

将匹配任何标记或 

string regex = @"(<.+?>|&nbsp;)"; 
var x = Regex.Replace(originalString, regex, "").Trim(); 

则x = hello

Answer 3

我一直在使用这个功能了一会儿穿过一个正则表达式过滤器。删除几乎任何杂乱的HTML，你可以扔在它，并保持文本完好无损。

 private static readonly Regex _tags_ = new Regex(@"<[^>]+?>", RegexOptions.Multiline | RegexOptions.Compiled); 

     //add characters that are should not be removed to this regex 
     private static readonly Regex _notOkCharacter_ = new Regex(@"[^\w;&#@.:/\\?=|%!() -]", RegexOptions.Compiled); 

     public static String UnHtml(String html) 
     { 
      html = HttpUtility.UrlDecode(html); 
      html = HttpUtility.HtmlDecode(html); 

      html = RemoveTag(html, "<!--", "-->"); 
      html = RemoveTag(html, "<script", "</script>"); 
      html = RemoveTag(html, "<style", "</style>"); 

      //replace matches of these regexes with space 
      html = _tags_.Replace(html, " "); 
      html = _notOkCharacter_.Replace(html, " "); 
      html = SingleSpacedTrim(html); 

      return html; 
     } 

     private static String RemoveTag(String html, String startTag, String endTag) 
     { 
      Boolean bAgain; 
      do 
      { 
       bAgain = false; 
       Int32 startTagPos = html.IndexOf(startTag, 0, StringComparison.CurrentCultureIgnoreCase); 
       if (startTagPos < 0) 
        continue; 
       Int32 endTagPos = html.IndexOf(endTag, startTagPos + 1, StringComparison.CurrentCultureIgnoreCase); 
       if (endTagPos <= startTagPos) 
        continue; 
       html = html.Remove(startTagPos, endTagPos - startTagPos + endTag.Length); 
       bAgain = true; 
      } while (bAgain); 
      return html; 
     } 

     private static String SingleSpacedTrim(String inString) 
     { 
      StringBuilder sb = new StringBuilder(); 
      Boolean inBlanks = false; 
      foreach (Char c in inString) 
      { 
       switch (c) 
       { 
        case '\r': 
        case '\n': 
        case '\t': 
        case ' ': 
         if (!inBlanks) 
         { 
          inBlanks = true; 
          sb.Append(' '); 
         } 
         continue; 
        default: 
         inBlanks = false; 
         sb.Append(c); 
         break; 
       } 
      } 
      return sb.ToString().Trim(); 
     } 

Answer 4

var noHtml = Regex.Replace(inputHTML, @"<[^>]*(>|$)|&nbsp;|&zwnj;|&raquo;|&laquo;", string.Empty).Trim(); 

Answer 5

我把@Ravi Thapliyal的代码，并提出了方法：这是简单的，并且可能不干净的一切，但到目前为止，它是做什么的，我需要做的事。

public static string ScrubHtml(string value) { 
    var step1 = Regex.Replace(value, @"<[^>]+>|&nbsp;", "").Trim(); 
    var step2 = Regex.Replace(step1, @"\s{2,}", " "); 
    return step2; 
} 

Answer 6

清理Html文档涉及很多棘手的事情。该软件包的帮助可能： https://github.com/mganss/HtmlSanitizer

Answer 7

(<([^>]+)>|&nbsp;) 

你可以在这里进行测试： https://regex101.com/r/kB0rQ4/1