C# 正则表达式在一个模式中找到多个 HTML 标签

Question

I have a random message (I don't know what will be the content) however, I know that is may contain HTML tags like <b> and <a href=> ... then I know that there is no more HTML tag than these. So, I am looking for a pattern which will be able to recognize and get the content between bold markup, also hyperlink and its content. I already did this code:

string pattern = "(<b>(.*)</b>)|(<a href=.*?>(.*?)<\\/a>)";
Match match = Regex.Match(content, pattern);
while (match.Success)

      if (match.Groups[0].Value.Contains("<b>"))
      {
            messageBlock.Dispatcher.Invoke(delegate
            {
                   messageBlock.Inlines.Add(new Run(content.Substring(0, match.Index)));
                   messageBlock.Inlines.Add(new Bold(new Run(match.Groups[1].Value)));
             });
       }
       else if (match.Groups[0].Value.Contains("<a href="))
       }
}

Nevertheless with this pattern, I can't recover the content match by example <a href=?> ... It only works for the bold tag.. Thank you

Answer 1

For parsing html is better to use Html Agility pack

Answer 2

Try @"(?s)<(?:(a)(?=\s)(?=(?:[^>""']|""[^""]*""|'[^']*')*?\shref\s*=(?:(['""])(.*?)\2))\s+(?:"".*?""|'.*?'|[^>]*?)+|b\s*)>(.*?)</(?(1)a|b)\s*>"

Where

• If Grp1 matched the a was found, otherwise the b was found
• Grp 2 disregard
• Grp 3 contains href value if grp1 matched
• Grp 4 contains contents

PCRE demo
but works for C#