[C#]递归遍历文件夹

        /// <summary>

        /// 递归获取文件夹目录下文件

        /// </summary>

        /// <param name="pathName">需要递归遍历的文件夹</param>

        /// <param name="fileRule">遍历规则『委托』</param>

        public static void LoopFolder(string pathName, Action<FileInfo> fileRule)

        {

            if (string.IsNullOrEmpty(pathName))

                throw new ArgumentNullException(pathName);



            Queue<string> _pathQueue = new Queue<string>();

            _pathQueue.Enqueue(pathName);

            while (_pathQueue.Count > 0)

            {

                string _path = _pathQueue.Dequeue();

                DirectorySecurity _pathSecurity = new DirectorySecurity(_path, AccessControlSections.Access);

                if (!_pathSecurity.AreAccessRulesProtected)//文件夹权限是否可访问

                {

                    DirectoryInfo _directoryInfo = new DirectoryInfo(_path);

                    foreach (DirectoryInfo diChild in _directoryInfo.GetDirectories())

                    {

                        _pathQueue.Enqueue(diChild.FullName);

                    }

                    foreach (FileInfo file in _directoryInfo.GetFiles())

                    {

                        fileRule(file);

                    }

                }

            }

        }

举例使用

                CSharpToolV2.LoopFolder(@"C:\Users\Administrator\Downloads\", (FileInfo file) =>

                {

                    if (file.Extension.Equals(".xls"))//获取excel类型文件

                    {

                        Console.WriteLine(string.Format("============{0}==============", file.FullName));

                    }

                });

代码效果