C#中对文件的操作

详细介绍参考：http://blog.csdn.net/wangyue4/article/details/4616801

源码举例：

 public class FileSystemManager
    {
        private static string strRootFolder;

        static FileSystemManager()
        {
            strRootFolder = HttpContext.Current.Request.PhysicalApplicationPath;
            strRootFolder = strRootFolder.Substring(0, strRootFolder.LastIndexOf(@"\"));

        }

        /// <summary>
        /// 读根目录
        /// </summary>
        /// <returns></returns>
        public static string GetRootPath()
        {
            return strRootFolder;
        }

        /// <summary>
        /// 写根目录
        /// </summary>
        /// <param name="path"></param>
        public static void SetRootPath(string path)
        {
            strRootFolder = path;
        }

        /// <summary>
        /// 读取列表
        /// </summary>
        /// <returns></returns>
        public static List<FileSystemItem> GetItems()
        {
            return GetItems(strRootFolder);
        }

        /// <summary>
        /// 读取列表
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static List<FileSystemItem> GetItems(string path)
        {
            string[] folders = Directory.GetDirectories(path);
            string[] files = Directory.GetFiles(path);
            List<FileSystemItem> list = new List<FileSystemItem>();
            foreach (string s in folders)
            {
                FileSystemItem item = new FileSystemItem();
                DirectoryInfo di = new DirectoryInfo(s);
                item.Name = di.Name;
                item.FullName = di.FullName;
                item.CreationDate = di.CreationTime;
                item.IsFolder = true;
                list.Add(item);
            }
            foreach (string s in files)
            {
                FileSystemItem item = new FileSystemItem();
                FileInfo fi = new FileInfo(s);
                item.Name = fi.Name;
                item.FullName = fi.FullName;
                item.CreationDate = fi.CreationTime;
                item.IsFolder = false;
                item.Size = fi.Length;
                list.Add(item);
            }

            return list;
        }

        /// <summary>
        /// 读取文件夹
        /// </summary>
        /// <param name="name"></param>
        /// <param name="parentName"></param>
        public static void CreateFolder(string name, string parentName)
        {
            DirectoryInfo di = new DirectoryInfo(parentName);
            di.CreateSubdirectory(name);
        }

        /// <summary>
        /// 删除文件夹
        /// </summary>
        /// <param name="path"></param>
        public static void DeleteFolder(string path)
        {
            Directory.Delete(path);
        }

        /// <summary>
        /// 移动文件夹
        /// </summary>
        /// <param name="oldPath"></param>
        /// <param name="newPath"></param>
        public static void MoveFolder(string oldPath, string newPath)
        {
            Directory.Move(oldPath, newPath);
        }

        /// <summary>
        /// 创建文件
        /// </summary>
        /// <param name="filename"></param>
        /// <param name="path"></param>
        public static void CreateFile(string filename, string path)
        {
            FileStream fs = File.Create(path + "\\" + filename);
            fs.Close();
        }

        /// <summary>
        /// 创建文件
        /// </summary>
        /// <param name="filename"></param>
        /// <param name="path"></param>
        /// <param name="contents"></param>
        public static void CreateFile(string filename, string path, byte[] contents)
        {
            FileStream fs = File.Create(path + "\\" + filename);
            fs.Write(contents, 0, contents.Length);
            fs.Close();
        }

        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="path"></param>
        public static void DeleteFile(string path)
        {
            File.Delete(path);
        }

        /// <summary>
        /// 移动文件
        /// </summary>
        /// <param name="oldPath"></param>
        /// <param name="newPath"></param>
        public static void MoveFile(string oldPath, string newPath)
        {
            File.Move(oldPath, newPath);
        }
        /// <summary>
        /// 复制文件
        /// </summary>
        /// <param name="oldPath"></param>
        /// <param name="newPath"></param>
        public static void CopyFile(string oldPath, string newPath)
        {
            File.Copy(oldPath, newPath, true);
        }
        /// <summary>
        /// 读取文件信息
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static FileSystemItem GetItemInfo(string path)
        {
            FileSystemItem item = new FileSystemItem();
            if (Directory.Exists(path))
            {
                DirectoryInfo di = new DirectoryInfo(path);
                item.Name = di.Name;
                item.FullName = di.FullName;
                item.CreationDate = di.CreationTime;
                item.IsFolder = true;
                item.LastAccessDate = di.LastAccessTime;
                item.LastWriteDate = di.LastWriteTime;
                item.FileCount = di.GetFiles().Length;
                item.SubFolderCount = di.GetDirectories().Length;
            }
            else
            {
                FileInfo fi = new FileInfo(path);
                item.Name = fi.Name;
                item.FullName = fi.FullName;
                item.CreationDate = fi.CreationTime;
                item.LastAccessDate = fi.LastAccessTime;
                item.LastWriteDate = fi.LastWriteTime;
                item.IsFolder = false;
                item.Size = fi.Length;
            }
            return item;
        }

        /// <summary>
        /// 复制文件夹
        /// </summary>
        /// <param name="source"></param>
        /// <param name="destination"></param>
        public static void CopyFolder(string source, string destination)
        {
            String[] files;
            if (destination[destination.Length - 1] != Path.DirectorySeparatorChar)
                destination += Path.DirectorySeparatorChar;
            if (!Directory.Exists(destination)) Directory.CreateDirectory(destination);
            files = Directory.GetFileSystemEntries(source);
            foreach (string element in files)
            {
                if (Directory.Exists(element))
                    CopyFolder(element, destination + Path.GetFileName(element));
                else
                    File.Copy(element, destination + Path.GetFileName(element), true);
            }
        }
｝

　　

 public class FileSystemItem
    {
        private string _Name;
        private string _FullName;

        private DateTime _CreationDate;
        private DateTime _LastAccessDate;
        private DateTime _LastWriteDate;

        private bool _IsFolder;

        private long _Size;
        private long _FileCount;
        private long _SubFolderCount;

        private string _Version;

        /// <summary>
        /// 名称
        /// </summary>
        public string Name
        {
            get
            {
                return _Name;
            }
            set
            {
                _Name = value;
            }
        }

        /// <summary>
        /// 完整目录
        /// </summary>
        public string FullName
        {
            get
            {
                return _FullName;
            }
            set
            {
                _FullName = value;
            }
        }

        /// <summary>
        /// 创建时间
        /// </summary>
        public DateTime CreationDate
        {
            get
            {
                return _CreationDate;
            }
            set
            {
                _CreationDate = value;
            }
        }

        /// <summary>
        /// 是否是文件夹
        /// </summary>
        public bool IsFolder
        {
            get
            {
                return _IsFolder;
            }
            set
            {
                _IsFolder = value;
            }
        }

        /// <summary>
        /// 大小
        /// </summary>
        public long Size
        {
            get
            {
                return _Size;
            }
            set
            {
                _Size = value;
            }
        }

        /// <summary>
        /// 访问时间
        /// </summary>
        public DateTime LastAccessDate
        {
            get
            {
                return _LastAccessDate;
            }
            set
            {
                _LastAccessDate = value;
            }
        }

        /// <summary>
        /// 修改时间
        /// </summary>
        public DateTime LastWriteDate
        {
            get
            {
                return _LastWriteDate;
            }
            set
            {
                _LastWriteDate = value;
            }
        }

        /// <summary>
        /// 文件数
        /// </summary>
        public long FileCount
        {
            get
            {
                return _FileCount;
            }
            set
            {
                _FileCount = value;
            }
        }

        /// <summary>
        /// 文件夹数
        /// </summary>
        public long SubFolderCount
        {
            get
            {
                return _SubFolderCount;
            }
            set
            {
                _SubFolderCount = value;
            }
        }

        /// <summary>
        /// 版本
        /// </summary>
        /// <returns></returns>
        public string Version()
        {
            if (_Version == null)
                _Version = GetType().Assembly.GetName().Version.ToString();

            return _Version;
        }

    }