寫入文件但文件爲空

Question

我正在將輸出寫入此文件，但它在Organized.txt中始終顯示爲空。如果我從sr2.WriteLine更改最後一個foreach循環，並且只使用WriteLine寫入控制檯，那麼輸出在控制檯上正確顯示，那麼爲什麼它不能正確顯示在文本文件中？

class Program 
    { 
     public static void Main() 
     { 

      string[] arr1 = new string[200]; 


      System.IO.StreamWriter sr2 = new System.IO.StreamWriter("OrganizedVersion.txt"); 




        // Dictionary, key is number from the list and the associated value is the number of times the key is found 
        Dictionary<string, int> occurrences = new Dictionary<string, int>(); 
        // Loop test data 
        foreach (string value in File.ReadLines("newWorkSheet.txt")) 
        { 
         if (occurrences.ContainsKey(value)) // Check if we have found this key before 
         { 
          // Key exists. Add number of occurrences for this key by one 
          occurrences[value]++; 
         } 
         else 
         { 
          // This is a new key so add it. Number 1 indicates that this key has been found one time 
          occurrences.Add(value, 1); 
         } 
        } 
        // Dump result 
        foreach (string key in occurrences.Keys) 
        { 
         sr2.WriteLine(key.ToString() + occurrences[key].ToString()); 
        }    

        Console.ReadLine(); 



     } 
    } 

Answer 1

您可以換行代碼在using確保流被關閉。

 using(StreamWriter sr2 = new StreamWriter("OrganizedVersion.txt")) 
     { 
      .... 
     } 

或寫入後，您可以flush或close。

sr2.close(); 

Answer 2

這是因爲你實際上寫OrganizedVersion.txt

貌似@Mathew還指出，你有沒有關閉/清空你的緩衝區。

嘗試using聲明如下：

替換：

System.IO.StreamWriter sr2 = new System.IO.StreamWriter("OrganizedVersion.txt"); 

有了：

using (var sr2 = new System.IO.StreamWriter("OrganizedVersion.txt")) 
{ 
    // Your other code... 
}