在C＃中使用Directory.GetFiles與正則表達式？

Question

我有這樣的代碼：

string[] files = Directory.GetFiles(path, "......", SearchOption.AllDirectories) 

我想要的是返回只不與p_和t_開始，具有擴展名PNG或JPG或GIF文件。我將如何做到這一點？

Answer 1

Directory.GetFiles不支持RegEx默認情況下，你可以做的是RegEx文件列表進行過濾。在此房源看看：

Regex reg = new Regex(@"^^(?!p_|t_).*"); 

var files = Directory.GetFiles(yourPath, "*.png; *.jpg; *.gif") 
        .Where(path => reg.IsMatch(path)) 
        .ToList(); 

Answer 2

您不能將Regex粘貼到參數中，它只是一個簡單的字符串過濾器。嘗試使用LINQ來代替事後過濾。

var files = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories) 
      .Where(s => s.EndsWith(".jpg") || s.EndsWith(".png")) 
      .Where(s => s.StartsWith("p_") == false && s.StartsWith("t_") == false) 

Answer 3

試試這個代碼，搜索每個驅動器，以及：

DriveInfo[] drives = DriveInfo.GetDrives(); 
foreach (DriveInfo drive in drives) 
{ 
    if (drive.RootDirectory.Exists) 
    { 
    DirectoryInfo darr = new DirectoryInfo(drive.RootDirectory.FullName); 
    DirectoryInfo[] ddarr = darr.GetDirectories(); 
    foreach (DirectoryInfo dddarr in ddarr) 
    { 
     if (dddarr.Exists) 
     { 
     try 
     { 
      Regex regx = new Regex(@"^(?!p_|t_)"); 
      FileInfo[] f = dddarr.GetFiles().Where(path => regx.IsMatch(path)); 
      List<FileInfo> myFiles = new List<FileInfo>(); 
      foreach (FileInfo ff in f) 
      { 
      if (ff.Extension == "*.png " || ff.Extension == "*.jpg") 
      { 
       myFiles.Add(ff); 
       Console.WriteLine("File: {0}", ff.FullName); 
       Console.WriteLine("FileType: {0}", ff.Extension); 
      } 
      } 
     } 
     catch 
     { 
      Console.WriteLine("File: {0}", "Denied"); 
     } 
     } 
    } 
    } 
}