創建同一個FileSystemWatcher的多個實例

Question

我的程序需要監視多個位置，但爲每個位置觸發相同的代碼。由於單個FileSystemWatcher不能監視多個位置，但是是否可以創建多個實例並傳遞給每個位置的文件夾路徑？

我無法對每個FileSystemWatcher進行硬編碼，因爲越來越多的位置需要及時添加，這需要由最終用戶完成，因爲我不得不手動硬編碼新的每次有FileSystemWatcher。所以我的計劃是將文件夾路徑保存到一個文件中，程序只爲列表中的每個路徑創建一個FileSystemWatcher。但我不知道這是否可能。

在這裏的工廠方法模式的建議去嘗試： 我得到的錯誤：「‘目錄’不包含‘添加’

public void StartWatchers() 
    { 
     string[] ArrayPaths = new string[2]; 
     List<FileSystemWatcher> watchers = new List<FileSystemWatcher>(); 
     ArrayPaths[0] = @"K:\Daily Record Checker\Test\Test1"; 
     ArrayPaths[1] = @"K:\Daily Record Checker\Test\Test2"; 

     int i = 0; 
     foreach (String String in ArrayPaths) 
     { 
      watcher.add(MyWatcherFatory(ArrayPaths[i])); 
      i++; 
     } 
     //Do other stuff.... 
     //.... 
     //Start my watchers... 
     foreach (FileSystemWatcher watcher in watchers) 
     { 
      Watcher.EnableRaisingEvents = true; 
      i++; 
     } 

    } 

    FileSystemWatcher MyWatcherFatory(string path) 
    { 
     FileSystemWatcher watcher = new FileSystemWatcher(path); 
     watcher.Changed += Watcher_Created; 
     watcher.Path = path; 
     watcher.Filter = "*.csv"; 
     return watcher; 
    } 

    private void Watcher_Created(object sender, FileSystemEventArgs e) 
    { 
     System.Threading.Thread.Sleep(1000); 
     FileInfo fileInfo = new FileInfo(e.FullPath); 
     if (!IsFileLocked(fileInfo)) 
     { 
      CheckNumberOfRecordsInFile(e.FullPath); 
     }   
    } 

Answer 1

使用factory method pattern

FileSystemWatcher MyWatcherFatory(string path, object additionalParameters) 
    { 
     FileSystemWatcher watcher = new FileSystemWatcher(path); 
     watcher.Changed += myWatcherChangedMethod;//Attach them to the same listeners,,, 
     //Set additional parameters... 
     return watcher. 
    } 

的定義。

編輯：根據這些信息，你還設置：

public void StartWatchers() 
    { 
     string[] ArrayPaths = new string[2]; 
     List<FileSystemWatcher> watchers = new List<FileSystemWatcher>(); 
     ArrayPaths[0] = @"K:\Daily Record Checker\Test\Test1"; 
     ArrayPaths[1] = @"K:\Daily Record Checker\Test\Test2"; 

     int i = 0; 
     foreach (String String in ArrayPaths) 
     { 
      watcher.add(MyWatcherFatory(ArrayPaths[i])); 
      i++; 
     } 
     //Do other stuff.... 
     //.... 
     //Start my watchers... 
     foreach (FileSystemWatcher watcherin watchers) 
     { 
      watcher.EnableRaisingEvents = true;; 
      i++; 
     } 

    } 

    FileSystemWatcher MyWatcherFatory(string path) 
    { 
     FileSystemWatcher watcher = new FileSystemWatcher(path); 
     watcher.Changed += Watcher_Created; 
     watcher.Path = path; 
     watcher.Filter = "*.csv"; 
     return watcher; 
    } 

    private void Watcher_Created(object sender, FileSystemEventArgs e) 
    { 
     System.Threading.Thread.Sleep(1000); 
     FileInfo fileInfo = new FileInfo(e.FullPath); 
     if (!IsFileLocked(fileInfo)) 
     { 
      CheckNumberOfRecordsInFile(e.FullPath); 
     }   
    }