讀取多個文本文件和內容存儲到一個數組

Question

我寫的，從5個文本文件中讀取數據，並根據某些給定的鍵字盡數C＃程序

 string[] word_1 = File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D1_H1.txt").Split(' '); 
     string[] word_2 = File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D2_H1.txt").Split(' '); 
     string[] word_3 = File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D3_H2.txt").Split(' '); 
     string[] word_4 = File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D4_H2.txt").Split(' '); 
     string[] word_5 = File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D5_H2.txt").Split(' '); 
     string[] given_doc = File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\Given_doc.txt").Split(' '); 

這是我從讀文本文件，閱讀，我使用的循環，如果循環計數從軟管文件中的每個字

for (int i = 0; i < word_1.Length; i++) 

     { 

      string s = word_1[i]; 


       if ("Red".Equals(word_1[i])) 
       { 
        //Console.WriteLine(word[i]); 

        h1_r++; 
       } 
       if ("Green".Equals(word_1[i])) 
       { 
        h1_g++; 
       } 
       if ("Blue".Equals(word_1[i])) 
       { 
        h1_b++; 
       } 

     } 

這是我用來從一個文件及其工作得很好計數的循環之後，我做了這個過程5次閱讀所有文件，我的問題是我怎麼能讀取這5個文件使用循環和存儲噸下襬陣列（每個關鍵詞的計數）

在此先感謝！

Answer 1

複製粘貼代碼通常是不好的。它導致代碼違反了不要重複自己（DRY）規則。調整你的代碼：

const string path = @"C:\Users\Niyomal N\Desktop\Assignment\Assignment"; 
string[] files = new string[] { "D1_H1.txt", "D2_H1.txt", "D3_H1.txt", ... }; 

foreach (string file in files) { 
    string fullPath = Path.Combine(path, file); 
    //TODO: count words of file `fullPath` 
} 

在陣列中存儲的字數是不是最優的，因爲你將不得不遍歷你在文件中遇到的每個字的陣列。 使用一個具有不變查找時間的字典。這要快得多。

var wordCount = new Dictionary<string, int>(); 

然後你可以算的話是這樣的：

int count; 
if (wordCount.TryGetValue(word, out count)) { 
    wordCount[word] = count + 1; 
} else { 
    wordCount[word] = 1; 
} 

---

UPDATE

可以測試關鍵字，這樣

var keywords = new HashSet<string> { "Red", "Green", "Blue" }; 

string word = "Green"; 
if (keywords.Contains(word)) { 
    ... 
} 

HasSets一跟詞典一樣快。

小心使用套管這個詞。 HashSets默認情況下區分大小寫。如果「紅色」和「紅色」和「RED」已被alltogehter發現，初始化HashSet這樣的：

var keywords = new HashSet<string>(StringComparer.InvariantCultureIgnoreCase) 
    { "Red", "Green", "Blue" }; 

Answer 2

List<KeyValuePair<string, string>> completeList = new List<KeyValuePair<string, string>>(); 

      completeList.AddRange("D1_H1.txt",File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D1_H1.txt").Split(' ')); 
      completeList.AddRange("D1_H2.txt", File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D2_H1.txt").Split(' ')); 
      completeList.AddRange("D1_H3.txt", File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D3_H2.txt").Split(' ')); 
      completeList.AddRange("D1_H4.txt", File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D4_H2.txt").Split(' ')); 
      completeList.AddRange("D1_H5.txt", File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\D5_H2.txt").Split(' ')); 
      completeList.AddRange("D1_H6.txt", File.ReadAllText(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment\Given_doc.txt").Split(' ')); 


      var result = completeList.GroupBy(r => r.Key).Select(r => new {File = r.Key, Red = r.Count(s => s.Value == "red"), Green = r.Count(s => s.Value == "green"), Blue = r.Count(s => s.Value == "blue") }); 
      foreach (var itm in result) 
      { 
       Console.WriteLine(itm.File); 
       Console.WriteLine(itm.Red); 
       Console.WriteLine(itm.Green); 
       Console.WriteLine(itm.Blue); 

      } 

Answer 3

LINQ查詢是您在這裏最簡單的解決方案：

var filenames = new[] { "D1_H1.txt", "D2_H1.txt", "D3_H2.txt" }; 
var words = new[] { "Red", "Green", "Blue" }; 
var counters = 
    filenames.Select(filename => Path.Combine(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment", filename)) 
      .SelectMany(filepath => File.ReadAllLines(filepath)) 
      .SelectMany(line => line.Split(new[] { ' ' })) 
      .Where(word => words.Contains(word)) 
      .GroupBy(word => word, (key, values) => new 
       { 
       Word = key, 
       Count = values.Count() 
       }) 
      .ToDictionary(g => g.Word, g => g.Count); 

，然後你把所有文件中的字計數器的詞典：

int redCount = counters["Red"]; 

如果你想存儲每個每個櫃檯文件中，可以使用略有修改的查詢：

var filenames = new[] { "D1_H1.txt", "D2_H1.txt", "D3_H2.txt" }; 
var words = new[] { "Red", "Green", "Blue" }; 
var counters = 
    filenames.Select(filename => Path.Combine(@"C:\Users\Niyomal N\Desktop\Assignment\Assignment", filename)) 
      .Select(filepath => new 
      { 
       Filepath = filepath, 
       Count = File.ReadAllLines(filepath) 
          .SelectMany(line => line.Split(new[] { ' ' })) 
          .Where(word => words.Contains(word)) 
          .GroupBy(word => word, (key, values) => new 
          { 
           Word = key, 
           Count = values.Count() 
          }) 
          .ToDictionary(g => g.Word, g => g.Count) 
      }) 
      .ToDictionary(g => g.Filepath, g => g.Count); 

，然後相應地使用它：

int redCount = counters[@"C:\Users\(...)\D1_H1.txt"]["Red"];