.net工具类——文件操作

        #region 文件操作

        /// <summary>
        /// 删除单个文件
        /// </summary>
        /// <param name="_filepath">文件相对路径</param>
        public static bool DeleteFile(string _filepath)
        {
            if (string.IsNullOrEmpty(_filepath))
            {
                return false;
            }
            string fullpath = GetMapPath(_filepath);
            if (File.Exists(fullpath))
            {
                File.Delete(fullpath);
                return true;
            }
            return false;
        }

        /// <summary>
        /// 删除上传的文件(及缩略图)
        /// </summary>
        /// <param name="_filepath"></param>
        public static void DeleteUpFile(string _filepath)
        {
            if (string.IsNullOrEmpty(_filepath))
            {
                return;
            }
            string fullpath = GetMapPath(_filepath); //原图
            if (File.Exists(fullpath))
            {
                File.Delete(fullpath);
            }
            if (_filepath.LastIndexOf("/") >= 0)
            {
                string thumbnailpath = _filepath.Substring(0, _filepath.LastIndexOf("/")) + "mall_" + _filepath.Substring(_filepath.LastIndexOf("/") + 1);
                string fullTPATH = GetMapPath(thumbnailpath); //宿略图
                if (File.Exists(fullTPATH))
                {
                    File.Delete(fullTPATH);
                }
            }
        }

        /// <summary>
        /// 删除指定文件夹
        /// </summary>
        /// <param name="_dirpath">文件相对路径</param>
        public static bool DeleteDirectory(string _dirpath)
        {
            if (string.IsNullOrEmpty(_dirpath))
            {
                return false;
            }
            string fullpath = GetMapPath(_dirpath);
            if (Directory.Exists(fullpath))
            {
                Directory.Delete(fullpath, true);
                return true;
            }
            return false;
        }

        /// <summary>
        /// 删除指定文件夹
        /// </summary>
        /// <param name="_dirpath">物理路径</param>
        public static bool DeleteDirectory_PhysicalPath(string _physicalpath)
        {
            if (string.IsNullOrEmpty(_physicalpath))
            {
                return false;
            }
            if (Directory.Exists(_physicalpath))
            {
                Directory.Delete(_physicalpath, true);
                return true;
            }
            return false;
        }

        /// <summary>
        /// 修改指定文件夹名称
        /// </summary>
        /// <param name="old_dirpath">旧相对路径</param>
        /// <param name="new_dirpath">新相对路径</param>
        /// <returns>bool</returns>
        public static bool MoveDirectory(string old_dirpath, string new_dirpath)
        {
            if (string.IsNullOrEmpty(old_dirpath))
            {
                return false;
            }
            string fulloldpath = GetMapPath(old_dirpath);
            string fullnewpath = GetMapPath(new_dirpath);
            if (Directory.Exists(fulloldpath))
            {
                Directory.Move(fulloldpath, fullnewpath);
                return true;
            }
            return false;
        }

        /// <summary>
        /// 返回文件大小KB
        /// </summary>
        /// <param name="_filepath">文件相对路径</param>
        /// <returns>int</returns>
        public static int GetFileSize(string _filepath)
        {
            if (string.IsNullOrEmpty(_filepath))
            {
                return 0;
            }
            string fullpath = GetMapPath(_filepath);
            if (File.Exists(fullpath))
            {
                FileInfo fileInfo = new FileInfo(fullpath);
                return ((int)fileInfo.Length) / 1024;
            }
            return 0;
        }

        /// <summary>
        /// 返回文件扩展名，不含“.”
        /// </summary>
        /// <param name="_filepath">文件全名称</param>
        /// <returns>string</returns>
        public static string GetFileExt(string _filepath)
        {
            if (string.IsNullOrEmpty(_filepath))
            {
                return "";
            }
            if (_filepath.LastIndexOf(".") > 0)
            {
                return _filepath.Substring(_filepath.LastIndexOf(".") + 1); //文件扩展名，不含“.”
            }
            return "";
        }

        /// <summary>
        /// 返回文件名，不含路径
        /// </summary>
        /// <param name="_filepath">文件相对路径</param>
        /// <returns>string</returns>
        public static string GetFileName(string _filepath)
        {
            return _filepath.Substring(_filepath.LastIndexOf(@"/") + 1);
        }

        /// <summary>
        /// 文件是否存在
        /// </summary>
        /// <param name="_filepath">文件相对路径</param>
        /// <returns>bool</returns>
        public static bool FileExists(string _filepath)
        {
            string fullpath = GetMapPath(_filepath);
            if (File.Exists(fullpath))
            {
                return true;
            }
            return false;
        }
        public static string GetFile(string filepath)
        {
            string json = string.Empty;
            using (FileStream fs = new FileStream(filepath, FileMode.Open, System.IO.FileAccess.Read, FileShare.ReadWrite))
            {
                using (StreamReader sr = new StreamReader(fs, Encoding.GetEncoding("gb2312")))
                {
                    json = sr.ReadToEnd().ToString();
                }
            }
            return json;
        }

        ///// <summary>
        ///// 获得远程字符串
        ///// </summary>
        //public static string GetDomainStr(string key, string uriPath)
        //{
        //    string result = CacheHelper.GetCache(key) as string;
        //    if (result == null)
        //    {
        //        System.Net.WebClient client = new System.Net.WebClient();
        //        try
        //        {
        //            client.Encoding = System.Text.Encoding.UTF8;
        //            result = client.DownloadString(uriPath);
        //        }
        //        catch
        //        {
        //            result = "暂时无法连接!";
        //        }
        //        CacheHelper.SetCache(key, result, 60);
        //    }

        //    return result;
        //}

        #endregion