C#文件和目录的操作

根据文件名获取文件

 /// <summary>
        /// 根据文件名获取文件
        /// </summary>
        /// <param name="directory"></param>
        /// <param name="fileName"></param>
        /// <param name="searchOption"></param>
        /// <returns></returns>
        private FileInfo[] GetFile(string directory, string fileName, SearchOption searchOption)
        {
            DirectoryInfo directoryInfo = new DirectoryInfo(directory);
            if (!directoryInfo.Exists)
                return null;

            return directoryInfo.GetFiles(fileName, searchOption);
        }

删除过期目录

/// <summary>
        /// 删除过期目录
        /// </summary>
        /// <param name="directory">根目录</param>
        /// <param name="day">期限</param>
        /// <returns></returns>
        private int DelectOverdueDirectorys(string directory, int day)
        {
            DirectoryInfo directoryInfoRoot = new DirectoryInfo(directory);
            if (!directoryInfoRoot.Exists)
                return 1;

            DirectoryInfo[] directoryInfos = directoryInfoRoot.GetDirectories();
            foreach (var directoryInfo in directoryInfos)
            {
                if (DateTime.Now.Subtract(directoryInfo.CreationTime).TotalDays > day)
                    directoryInfo.Delete(true);
            }

            return 0;
        }

删除过期文件

/// <summary>
        /// 删除过期文件
        /// </summary>
        /// <param name="directory">根目录</param>
        /// <param name="day">期限</param>
        /// <returns></returns>
        private int DelectOverdueFiles(string directory, int day)
        {
            DirectoryInfo directoryInfoRoot = new DirectoryInfo(directory);
            if (!directoryInfoRoot.Exists)
                return 1;

            FileInfo[] fileInfos = directoryInfoRoot.GetFiles();
            foreach (var fileInfo in fileInfos)
            {
                if (DateTime.Now.Subtract(fileInfo.CreationTime).TotalDays > day)
                    fileInfo.Delete();
            }

            return 0;
        }

设置目录隐藏

/// <summary>
        /// 设置目录隐藏
        /// </summary>
        /// <param name="directory"></param>
        /// <returns></returns>
        private int SetDirectoryHide(string directory)
        {
            DirectoryInfo directoryInfo = new DirectoryInfo(directory);
            if (!directoryInfo.Exists)
                return 1;

            directoryInfo.Attributes = FileAttributes.Hidden;
            return 0;
        }

目录加解锁

string FileExtend = ".{2559a1f2-21d7-11d4-bdaf-00c04f60b9f0}";

        /// <summary>
        /// 目录加锁
        /// </summary>
        /// <param name="directory"></param>
        /// <returns></returns>
        private int DirectoryEncrypt(string directory)
        {
            DirectoryInfo directoryInfo = new DirectoryInfo(directory);
            if (!directoryInfo.Exists)
                return 1;

            directoryInfo.MoveTo(directory + FileExtend);
            return 0;
        }

        /// <summary>
        /// 目录解锁
        /// </summary>
        /// <param name="directory"></param>
        /// <returns></returns>
        private int DirectoryDecrypt(string directory)
        {
            DirectoryInfo directoryInfo = new DirectoryInfo(directory + FileExtend);
            if (!directoryInfo.Exists)
                return 1;

            directoryInfo.MoveTo(directory);
            return 0;
        }