c# - 退出递归函数搜索子目录

Question

我试图以递归方式获取给定目录中所有子目录的列表，因为现有命令显然不够好。我可以成功获取目录，但似乎无法离开递归算法。我敢肯定，一定有一种我没有看到的简单方法。任何帮助都会很棒!

public static public void directorySearch(ref List<DirectoryInfo> subs, ref DirectoryInfo dir, ref List<FileInfo> fileEntries, ref int k)
{
  do
    {
      foreach (DirectoryInfo elements in dir.GetDirectories())
      {
        subs.Add(elements);
      }
      k++;
      DirectoryInfo fi = subs[k];
      directorySearch(ref subs, ref fi, ref fileEntries, ref k);
    } while (??????);
      //This will be used once function is working to get files in all directories
        /*
      foreach (FileInfo f in dir.GetFiles()
      {
          fileEntries.Add(f);
      }*/
}

Answer 1

试试这个来获取目录:

public static IEnumerable<DirectoryInfo> DirectorySearch(DirectoryInfo dir)
{
    return
        dir
            .GetDirectories()
            .SelectMany(x => DirectorySearch(x))
            .StartWith(dir);
}

然后您可以执行 DirectorySearch("C:\My\Path").SelectMany(x => x.GetFiles()) 来获取文件。

---

或者你可以使用这个:

public static IEnumerable<DirectoryInfo> DirectorySearch(DirectoryInfo dir)
{
    yield return dir;
    foreach (DirectoryInfo x in dir.GetDirectories())
        foreach (DirectoryInfo y in DirectorySearch(x))
            yield return y;
}

---

甚至这样:

public static List<DirectoryInfo> DirectorySearch(DirectoryInfo dir)
{
    List<DirectoryInfo> subs = new List<DirectoryInfo>();
    subs.Add(dir);
    foreach (DirectoryInfo x in dir.GetDirectories())
    {
        foreach (DirectoryInfo y in DirectorySearch(x))
        {
            subs.Add(y);
        }
    }
    return subs;
}