如何在具有特殊条件的C#中使用Regex关键字突出显示？

Question

我是Regex的新手，所以我需要从我的麻烦中得到帮助。

这是我的密码：

private static string MatchEval(Match match)
{
    if (match.Groups[1].Success)    
        return "<strong>" + match.ToString() + "</strong>";
    return "";
}

private static string HighlightKeywords(string keywords, string text)
{   
    Regex r = new Regex(@", ?");
    keywords = "(" + r.Replace(keywords, @"|") + ")";   
    r = new Regex(keywords, RegexOptions.Singleline | RegexOptions.IgnoreCase); 
    return r.Replace(text, new MatchEvaluator(MatchEval));
}

string keywords = "group, person, club";
string text = "A fan club is a group that is dedicated to a well-known person";

当我打电话给HighlightKeywords(string keywords, string text);

->结果：A fan <strong>club</strong> is a <strong>group</strong> that is dedicated to a well-known <strong>person</strong> 工作正确

但如果string text = "A fan <strong>club</strong> is a group that is dedicated to a well-known person";

->结果：A fan <strong></strong><strong>club</strong> is a <strong>group</strong> that is dedicated to a well-known <strong>person</strong>

工作失败(我希望仅用<strong>club</strong>删除<strong></strong><strong>club</strong> )

另一个案例if text = "A fanclub is a group that is dedicated to a well-known person";注：“扇俱乐部”没有空格

结果-> A fan<strong>club</strong> is a <strong>group</strong> that is dedicated to a well-known <strong>person</strong>

但我想得到结果-> A fanclub is a <strong>group</strong> that is dedicated to a well-known <strong>person</strong>

有人能帮我做这件事吗？

Answer 1

你可以试试这个：

keywords = "\b(" + r.Replace(keywords, @"|") + ")\b";

\b -用于非字字符

Answer 2

你的关键词应该是这样

string keywords = "\bgroup\b, \bperson\b, \bclub\b";

\b会创建一个边界，这样fanclub就不匹配了！