如果用不同的正則表達式語句參數

Question

你好我想單詞列表上讀取標籤，列表中有一個像（TMConnects（MEN）什麼（WP）發生（VB）字（TO）你（ADV）我（ADV）tm（N）網站（N）i（N）can（ADV）access（N）to（TO）view（N）my（ADV）bills（N））我試圖使用if語句和正則表達式閱讀每個標籤，以便我可以適當地對這些詞進行分類。

這裏是我試過

foreach (string word in tokensList) 
     { 
      //Verbs 
      Match match_verb = Regex.Match(word, @"[a-zA-Z]+\(vb\)"); 
      if (match_verb.Success) 
      { 
       Console.WriteLine(word + "v"); 
       Verbs.Add(word); 
      } 
      else 
      { 
       //Nouns 
       Match match_noun = Regex.Match(word, @"[a-zA-Z]+\(n\)"); 
       if (match_noun.Success) 
       { 
        Console.WriteLine(word + "n"); 
        Nouns.Add(word); 
       } 
       else 
       { 
        //Adverb(Ad) 
        Match match_adverb = Regex.Match(word, @"[a-zA-Z]+\(adv\)"); 
        if (match_adverb.Success) 
        { 
         Console.WriteLine(word + "adv"); 
         Adverbs.Add(word); 
        } 
        else 
        { 
         //Adjective(Adj) 
         Match match_adj = Regex.Match(word, @"[a-zA-Z]+\(adj\)"); 
         if (match_adj.Success) 
         { 
          Console.WriteLine(word + "adj"); 
          Adjectives.Add(word); 
         } 
         else 
         { 
          //Mention(Men) 
          Match match_men = Regex.Match(word, @"[a-zA-Z]+\(men\)"); 
          if (match_men.Success) 
          { 
           Console.WriteLine(word + "men"); 
           Mentions.Add(word); 
          } 
          else 
          { 
           //Object(KNK) 
           Match match_obj = Regex.Match(word, @"[a-zA-Z]+\(knk\)"); 
           if (match_obj.Success) 
           { 
            Console.WriteLine(word + "obj"); 
            Objects.Add(word); 
           } 
           else 
           { 
            //Features(KT) 
            Match match_feature = Regex.Match(word, @"[a-zA-Z]+\(kt\)"); 
            if (match_feature.Success) 
            { 
             Console.WriteLine(word + "ft"); 
             Features.Add(word); 
            } 
            else 
            { 
             //break; 
            } 
           } 
          } 
         } 
        } 
       } 

請幫助我的代碼。

Answer 1

如果我是小寫所有從你提供的列表中括號內的文字，我得到的所有正確的結果返回。所以，我要承擔的問題是Mark suggested：你有你的正則表達式是大小寫敏感的，並修復所有你需要做的就是提供RegexOptions.IgnoreCase選項的問題。

因此，而不是Regex.Match(word, @"[a-zA-Z]+\(vb\)") 它會是這樣的Regex.Match(word, @"[a-z]+\(vb\)", RegexOptions.IgnoreCase)。

然而，在一次標誌的建議，你是最有可能在多數民衆贊成照顧太多具體的解決方案的方式接近問題。也就是說，不是每個條件都有一個if-else語句（每次嘗試執行正則表達式匹配），您可以使用更通用的正則表達式執行單個匹配，並利用.NET提供的工具來創建一個更靈活的方案。

foreach (var match in 
     tokensList.Select(
      word => 
       // Two capturing groups: "word" (unnecessary in your case) and "type", 
       // where "word" contains the word only (e.g. TMConnects) and "type" contains the type only (e.g. MEN). 
       Regex.Match(
        word, 
        // Match any letters appearing one or more times followed by an opening bracket ('('), anything that 
        // isn't a closing bracket and a closing bracket (')'). 
        @"^(?<word>[a-z]+)\((?<type>[^\)]+)\)$", 
        // Tell the regular expression engine to ignore the casing. 
        RegexOptions.IgnoreCase)) 
        // Filter out words that don't match the regular expression. 
        .Where(match => match.Success)) 
    { 
     // The whole word (including the type. 
     var word = match.Value; 
     // The type lower-cased, for convenience. 
     var type = match.Groups["type"].Value.ToLowerInvariant(); 
     switch (type) 
     { 
      case "vb": 
       Console.WriteLine(word + "v"); 
       Verbs.Add(word); 
       break; 
      case "n": 
       Console.WriteLine(word + "n"); 
       Nouns.Add(word); 
       break; 
      case "adv": 
       Console.WriteLine(word + "adv"); 
       Adverbs.Add(word); 
       break; 
      case "adj": 
       Console.WriteLine(word + "adj"); 
       Adjectives.Add(word); 
       break; 
      case "men": 
       Console.WriteLine(word + "men"); 
       Mentions.Add(word); 
       break; 
      case "knk": 
       Console.WriteLine(word + "obj"); 
       Objects.Add(word); 
       break; 
      case "kt": 
       Console.WriteLine(word + "ft"); 
       Features.Add(word); 
       break; 
     } 
    }