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 ;

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

             return ;
         }

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 ;

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

             return ;
         }

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 ;

             directoryInfo.Attributes = FileAttributes.Hidden;
             return ;
         }

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 ;

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

         /// <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 ;

             directoryInfo.MoveTo(directory);
             return ;
         }