使用C中的正则表达式突出显示单词列表#

首先你需要 Regex.Escape() 所有输入字符串。

然后,您可以在字符串中查找它们,并通过记住的标记迭代替换它们:

string abbr      = "memb";
string word      = "Member";
string pattern   = String.Format("\b{0}\b", Regex.Escape(abbr));
string substitue = String.Format("[a title=\"{0}\"]{1}[/a]", word, abbr);
string output    = Regex.Replace(input, pattern, substitue);

编辑:我问是否简单 String.Replace() 这还不够——但我明白了为什么需要regex:您可以使用它来强制“全字”替换,只需生成一个使用单词边界锚定的模式。

您可以从所有转义的输入字符串构建单个模式,如下所示:

\b(?:{abbr_1}|{abbr_2}|{abbr_3}|{abbr_n})\b

然后使用 match evaluator 找到合适的替代品。这样可以避免多次迭代输入字符串。

不确定这将在多大程度上扩展到一个单词列表,但我认为它应该给出您想要的输出(尽管在您的问题中,“结果”似乎与“内容”相同)?

不管怎样,如果这是你想要的,请告诉我。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var input = @"This is just a little test of the memb to see if it gets picked up. 
Deb of course should also be caught here.";
            var dictionary = new Dictionary<string,string>
            {
                {"memb", "Member"}
                ,{"deb","Debut"}
            };
            var regex = "(" + String.Join(")|(", dictionary.Keys.ToArray()) + ")";
            foreach (Match metamatch in Regex.Matches(input
               , regex  /*@"(memb)|(deb)"*/
               , RegexOptions.IgnoreCase | RegexOptions.ExplicitCapture))
            { 
                input = input.Replace(metamatch.Value, dictionary[metamatch.Value.ToLower()]);
            }
            Console.Write (input);
            Console.ReadLine();
        }
    }
}

我怀疑它的性能会比普通的string.replace好,所以如果性能是关键的度量(重构一点以使用编译后的regex)。您可以按如下方式执行regex版本:

var abbrsWithPipes = "(abbr1|abbr2)";
var regex = new Regex(abbrsWithPipes);
return regex.Replace(html, m => GetReplaceForAbbr(m.Value));

您需要实现getreplaceforabbr,它接收要匹配的特定abbr。

我做的正是你在我的应用程序中寻找的,这对我很有用: str参数是您的内容:

public static string GetGlossaryString(string str)
        {
            List<string> glossaryWords = GetGlossaryItems();//this collection would contain your abbreviations; you could just make it a Dictionary so you can have the abbreviation-full term pairs and use them in the loop below 

            str = string.Format(" {0} ", str);//quick and dirty way to also search the first and last word in the content.

            foreach (string word in glossaryWords)
                str = Regex.Replace(str, "([\\W])(" + word + ")([\\W])", "$1<span class='glossaryItem'>$2</span>$3", RegexOptions.IgnoreCase);

            return str.Trim();
        }

对于任何感兴趣的人,这是我的最终解决方案。它用于.NET用户控件。它使用一个带有匹配评估器的单一模式,如tomalak所建议的,因此没有foreach循环。这是一个很好的解决方案,它为示例输入提供了正确的输出,同时为匹配的字符串保留了正确的大小写。

public partial class Abbreviations : System.Web.UI.UserControl
{
    private Dictionary<String, String> dictionary = DataHelper.GetAbbreviations();

    protected void Page_Load(object sender, EventArgs e)
    {
        string input = "This is just a little test of the memb. And another memb, but not amemba to see if it gets picked up. Deb of course should also be caught here.deb!";

        var regex = "\\b(?:" + String.Join("|", dictionary.Keys.ToArray()) + ")\\b";

        MatchEvaluator myEvaluator = new MatchEvaluator(GetExplanationMarkup);

        input = Regex.Replace(input, regex, myEvaluator, RegexOptions.IgnoreCase);

        litContent.Text = input;
    }

    private string GetExplanationMarkup(Match m)
    {
        return string.Format("<b title='{0}'>{1}</b>", dictionary[m.Value.ToLower()], m.Value);
    }
}

输出如下所示。注意,它只匹配完整的单词,并且套管保留在原始字符串中:

This is just a little test of the <b title='Member'>memb</b>. And another <b title='Member'>memb</b>, but not amemba to see if it gets picked up. <b title='Debut'>Deb</b> of course should also be caught here.<b title='Debut'>deb</b>!