C# 获取路径下所有文件夹名，文件名

    static void Main(string[] args)
        {      
            string topPath = @"F:";
            StreamWriter sw = null;
            try
            {
                //创建输出流，将得到文件名子目录名保存到txt中
                sw = new StreamWriter(new FileStream("fileList.txt", FileMode.Append));
                sw.WriteLine("根目录：" + topPath);
                getDirectory(sw, topPath, 2);
            }
            catch (IOException e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                if (sw != null)
                {
                    sw.Close();
                    Console.WriteLine("完成");
                }
            }
        }

        /// 

        /// 获得指定路径下所有文件名
        /// 
        /// 文件写入流
        /// 文件写入流
        /// 输出时的缩进量
        public static void getFileName(StreamWriter sw, string path, int indent)
        {
            DirectoryInfo root = new DirectoryInfo(path);
            foreach (FileInfo f in root.GetFiles())
            {
                for (int i = 0; i < indent; i++)
                {
                    sw.Write("  ");
                }
                sw.WriteLine(f.Name);
            }
        }

        /// 

        /// 获得指定路径下所有子目录名
        /// 
        /// 文件写入流
        /// 文件夹路径
        /// 输出时的缩进量
        public static void getDirectory(StreamWriter sw, string path, int indent)
        {
            getFileName(sw, path, indent);
            DirectoryInfo root = new DirectoryInfo(path);
            foreach (DirectoryInfo d in root.GetDirectories())
            {
                for (int i = 0; i < indent; i++)
                {
                    sw.Write("  ");
                }
                sw.WriteLine("文件夹：" + d.Name);
                getDirectory(sw, d.FullName, indent + 2);
                sw.WriteLine();
            }
        }

运行结果如图：