我怎樣才能 go 到父目錄？ （C＃）

Question

if (Console.ReadKey(true).Key == ConsoleKey.E)
{
    Console.Clear();
    Console.WriteLine("Enter path: ");
    string Answer = Console.ReadLine();  
     foreach (var SelectedDir in System.IO.Directory.GetDirectories(Answer))
  {
      Console.WriteLine(SelectedDir + "\n");
  }
    string RootPath = Console.ReadLine();
    Console.Clear();
      Console.WriteLine("What would you like to do with " + RootPath + "?");
      Console.WriteLine("A)Access Folder\nB)Delete Folder (Has to be empty)");
   if (Console.ReadKey(true).Key == ConsoleKey.A)
   {
     AccessFolder(RootPath);
   }
   else if (Console.ReadKey(true).Key == ConsoleKey.B)
      {
       System.IO.Directory.Delete(RootPath);

      } 
         AccessFolder(RootPath); 
}
static void AccessFolder(string RootPath)
{
  foreach (var SelectedRoot in System.IO.Directory.GetDirectories(RootPath))
  {
    Console.WriteLine(SelectedRoot + "\n");
  } 
  string NextRoot = Console.ReadLine();
  Console.Clear(); 
  Console.WriteLine("What would you like to do with " + NextRoot + "?");
  Console.WriteLine("A) Access Folder\nB)Delete Folder (Has to be empty)");
  if (Console.ReadKey(true).Key == ConsoleKey.A)
  {
    AccessFolder(NextRoot);
  }
  else if (Console.ReadKey(true).Key == ConsoleKey.B)
  {
    System.IO.Directory.Delete(NextRoot);

  }
} 

我不知道如何 go 到父根。 我已經嘗試了 2 天，但無法提出任何建議。 我考慮過將目錄傳遞給一個字符串，每當用戶想要 go 到他所在目錄的父級時，路徑將等於 RootPath ，它將被傳遞到 AccessFolder 方法中。 我不確定這是否實用或是否會引起問題。 假設我有目錄“D:\StackOverflow\Test”，刪除最后一個 \ 之后的所有文本是否是個好主意，這樣目錄的路徑將是“D:\StackOverflow”？ 任何幫助深表感謝。

Answer 1

以下將獲取父文件夾。

public static class DirectoryHelpers
{
    /// <summary>
    /// Traverse <seealso cref="folderName"/> backwards
    /// </summary>
    /// <param name="folderName">Existing folder</param>
    /// <param name="level">Level backwards</param>
    /// <returns>folder path <seealso cref="level"/> up</returns>
    public static string UpperFolder(this string folderName, int level)
    {


        var folderList = new List<string>();

        while (!string.IsNullOrWhiteSpace(folderName))
        {
            
            var parentFolder = Directory.GetParent(folderName);

            if (parentFolder == null)
            {
                break;
            }

            folderName = Directory.GetParent(folderName)!.FullName;
            folderList.Add(folderName);
        }

        return folderList.Count > 0 && level > 0
            ? level - 1 <= folderList.Count - 1 ? folderList[level - 1] : folderName
            : folderName;
    }

    public static string ParentFolder(string sender) => sender.UpperFolder(1);
}

parentFolder將為C:\OED\Dotnetland硬編碼示例

string folderName = @"C:\OED\Dotnetland\VS2022";
string parentFolder = DirectoryHelpers.ParentFolder(folderName);