設置遞歸子文件夾的文件屬性

Question

我在試圖設置文件夾內有文件的設置爲Readonly時出現了問題。我可以設置文件夾屬性，但不能設置其中的文件。

這將設置包含子文件夾的屬性，然後刪除。在codeproject.

發現信息使用此：

ScanDirectory scanDirectory = new ScanDirectory(); 
scanDirectory.WalkDirectory(@"/Storage Card"); 

public class ScanDirectory 
{ 
    public void WalkDirectory(string directory) 
    { 
     WalkDirectory(new DirectoryInfo(directory)); 
    } 

    private void WalkDirectory(DirectoryInfo directory) 
    { 
     // Scan all files in the current path 
     foreach (FileInfo file in directory.GetFiles()) 
     { 
      file.Attributes &= ~FileAttributes.ReadOnly; 
      file.Delete(); 
     } 

     DirectoryInfo[] subDirectories = directory.GetDirectories(); 

     // Scan the directories in the current directory and call this method 
     // again to go one level into the directory tree 
     foreach (DirectoryInfo subDirectory in subDirectories) 
     { 
      WalkDirectory(subDirectory); 
      subDirectory.Attributes &= ~FileAttributes.ReadOnly; 

      subDirectory.Delete(); 
     } 
    } 
} 

Answer 1

你可以使用樹的遍歷深度優先搜索（堆棧版本）或呼吸優先搜索（隊列版）看到你的文件夾，像這樣的：

static void Main(String[] args) 
{ 
    // Using breath-first search (BFS) 
    Queue<DirectoryInfo> myQueue = new Queue<DirectoryInfo>(); 

    // Your storage path here 
    myQueue.Enqueue(new DirectoryInfo("C:\\")); 

    while(myQueue.Count > 0) 
    { 
     // Look at the current directory 
     DirectoryInfo crtDI = myQueue.Dequeue(); 

     // Put the directories from the crt dir in a queue 
     foreach (DirectoryInfo otherDir in GetCrtDirectories(crtDI)) 
      myQueue.Enqueue(otherDir); 

     // Do what you want with the directory here 
     FixAccess(crtDI); 
    } 
} 

private static IEnumerable<DirectoryInfo> GetCrtDirectories(DirectoryInfo crtDI) 
{ 
    foreach(string dirStr in Directory.GetDirectories(crtDI.FullName)) 
    { 
     DirectoryInfo newDir = new DirectoryInfo(dirStr); 
     yield return newDir; 
    } 
} 

private static void FixAccess (DirectoryInfo DI) 
{ 
    foreach (string fileName in System.IO.Directory.GetFiles(DI.FullName)) 
    { 
     FileInfo fileInfo = new FileInfo(fileName); 
     FileAttributes attributes = fileInfo.Attributes; 

     if ((attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly) 
     { 
      // set the attributes to nonreadonly 
      fileInfo.Attributes &= ~FileAttributes.ReadOnly; 
     } 
    } 
} 

Answer 2

您可以創建一個遞歸函數來完成這項工作：

private void UpdateFileAttributes(DirectoryInfo dInfo) 
    { 
     // Set Directory attribute 
     dInfo.Attributes &= ~FileAttributes.ReadOnly; 

     // get list of all files in the directory and clear 
     // the Read-Only flag 

     foreach (FileInfo file in dInfo.GetFiles()) 
     { 
      file.Attributes &= ~FileAttributes.ReadOnly; 
     } 

     // recurse all of the subdirectories 
     foreach (DirectoryInfo subDir in dInfo.GetDirectories()) 
     { 
      UpdateFileAttributes(subDir); 
     } 
    }