c#目录操作示例(获取目录名称 获取子目录)

 

using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.io;
namespace humep.filewatcher
{
    /// <summary>
    ///
    /// </summary>
    public static class directoryhelper
    {
        /// <summary>
        /// 初始化目录
        /// </summary>
        /// <param name="directory"></param>
        /// <returns></returns>
        public static bool createdirectory(string directory)
        {
            if (string.isnullorwhitespace(directory))
            {
                return false;
            }
            if (directory.exists(directory))
            {
                return true;
            }
            var dirinfo = directory.createdirectory(directory);
            return dirinfo != null;
        }

        /// <summary>
        /// 根据当前日组合文件夹名称
        /// </summary>
        /// <param name="now"></param>
        /// <returns></returns>
        public static string builddatedirectoryname(datetime datetime)
        {
            return datetime.tostring("yyyymmdd");
        }
        /// <summary>
        ///
        /// </summary>
        /// <returns></returns>
        public static string buildtodaydirectoryname()
        {
            return builddatedirectoryname(datetime.now);
        }
        /// <summary>
        /// 获取目录名称
        /// </summary>
        /// <param name="directory"></param>
        /// <returns></returns>
        public static string getdirectoryname(string directory)
        {
            if (!directory.exists(directory))
            {
                return string.empty ;// directoryhelper.createdirectory(directory);
            }
            return new directoryinfo(directory).name;
        }
        /// <summary>
        /// 获取目录文件夹下的所有子目录
        /// </summary>
        /// <param name="directory"></param>
        /// <param name="filepattern"></param>
        /// <returns></returns>
        public static list<string> findsubdirectories(string directory, int maxcount)
        {
            list<string> subdirectories = new list<string>();
            if (string.isnullorempty(directory))
            {
                return subdirectories;
            }
            if (maxcount <= 0)
            {
                return subdirectories;
            }
            string[] directories = directory.getdirectories(directory);
            foreach (string subdirectory in directories)
            {
                if (subdirectories.count == maxcount)
                {
                    break;
                }
                subdirectories.add(subdirectory);
            }
            return subdirectories;
        }
        public static list<string> findsubdirectories(string directory)
        {
            return directory.getdirectories(directory, "*", searchoption.alldirectories).tolist<string>();
        }
        /// <summary>
        /// 根据时间查询子目录
        /// </summary>
        /// <param name="directory"></param>
        /// <param name="maxcount"></param>
        /// <returns></returns>
        public static list<string> findsubdirectories(string directory, int maxcount, int days)
        {
            list<string> subdirectories = new list<string>();
            if (string.isnullorempty(directory))
            {
                return subdirectories;
            }
            if (maxcount <= 0)
            {
                return subdirectories;
            }
            string[] directories = directory.getdirectories(directory);
            datetime lasttime = datetime.now.adddays(-math.abs(days));
            foreach (string subdirectory in directories)
            {
                if (subdirectories.count == maxcount)
                {
                    break;
                }
                directoryinfo dirinfo = new directoryinfo(subdirectory);
                if (dirinfo.lastwritetime >= lasttime)
                {
                    subdirectories.add(subdirectory);
                }
            }
            return subdirectories;
        }
        /// <summary>
        /// 将原目录移动到目标目录
        /// </summary>
        /// <param name="sourcedirectory"></param>
        /// <param name="targetdirectory"></param>
        /// <returns></returns>
        public static bool movedirectory(string sourcedirectory, string targetdirectory)
        {
            if (string.isnullorempty(sourcedirectory) || string.isnullorempty(targetdirectory))
            {
                return false;
            }
            string lasemovedirectory = string.format("{0}\\{1}", targetdirectory, directoryhelper.getdirectoryname(sourcedirectory));
            while (directory.exists(lasemovedirectory))
            {
                lasemovedirectory = directoryhelper.rename(lasemovedirectory);
            }
            directory.move(sourcedirectory, lasemovedirectory);
            return true;
        }
        /// <summary>
        /// 重新生成新的文件路径
        /// </summary>
        /// <param name="filepath"></param>
        /// <returns></returns>
        public static string rename(string filepath)
        {
            if (string.isnullorwhitespace(filepath))
            {
                return string.empty;
            }
            string lastdirname = directoryhelper.getdirectoryname(filepath);
            //重命名，则随机在原来文件名后面加几个随机数字进行组装成新的名字
            random random = new random(system.datetime.now.millisecond);
            string randomdata = random.next().tostring();
            //把原文件名的名字加上随机数，组装成新的文件名（避免重名）
            string newlastdirname = lastdirname + randomdata;
            string newdirpath = string.empty;
            newdirpath = filepath.substring(0, filepath.lastindexof("\\")) + "\\" + newlastdirname;
            //返回新的路径
            return newdirpath;
        }
        /// <summary>
        /// 获取指定目录下的所有文件和文件夹大小
        /// </summary>
        /// <param name="path">目录路径</param>
        /// <returns>string，返回所有文件夹名字</returns>
        public static long getdirectorysize(string path)
        {
            long dirsize = 0;
            directoryinfo dir = new directoryinfo(path);
            foreach (fileinfo file in dir.getfiles())
                dirsize += file.length;
            foreach (directoryinfo subdir in dir.getdirectories())
                dirsize += getdirectorysize(subdir.fullname);
            return dirsize;
        }
    }
}