根据指定目录获取所以文件包括子目录下的文件

        /// <summary>
        /// 获取目录中所有文件包含子目录中的文件
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        private List<string> GetAllFiles(string path)
        {
            List<string> list = GetFiles(path);
            foreach (string dir in Directory.GetDirectories(path))
            {
                if (Directory.GetDirectories(dir).Length > 0)
                    list.AddRange(GetAllFiles(dir));
                else
                    list.AddRange(GetFiles(dir));
            }
            return list;
        }

        /// <summary>
        /// 获取文件
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        private List<string> GetFiles(string path)
        {
            
            List<string> files = new List<string>();
            foreach (string file in Directory.GetFiles(path, "*.*"))
            {
                files.Add(file);
            }
            return files;
        }