//判断文件夹(路径)是否存在

        if (Directory.Exists(Path))

        {

        }

        //获取文件大小

        FileInfo file = new FileInfo(labOfPath);

        size += file.Length;

        /// <summary>

        /// 计算文件大小函数(保留两位小数),Size为字节大小

        /// </summary>

        /// <param name="Size">初始文件大小</param>

        /// <returns></returns>

        private static string CountSize(long Size)

        {

            string m_strSize = "";

            long FactSize = ;

            FactSize = Size;

            if (FactSize < 1024.00)

                m_strSize = FactSize.ToString("F2") + " Byte";

            else if (FactSize >= 1024.00 && FactSize < )

                m_strSize = (FactSize / 1024.00).ToString("F2") + " K";

            else if (FactSize >=  && FactSize < )

                m_strSize = (FactSize / 1024.00 / 1024.00).ToString("F2") + " M";

            else if (FactSize >= )

                m_strSize = (FactSize / 1024.00 / 1024.00 / 1024.00).ToString("F2") + " G";

            return m_strSize;

        }                    

        /// <summary>

        /// 递归获取文件夹的大小(字节)(包含里面的子文件及子文件夹)

        /// </summary>

        /// <param name="size"></param>

        /// <param name="Path"></param>

        /// <returns></returns>

        private static long GetDirectorySize(string Path)

        {

            long size = ;

            DirectoryInfo di = new DirectoryInfo(Path);

            foreach (FileInfo fi in di.GetFiles())

            {

                size += fi.Length;

            }

            DirectoryInfo[] dis = di.GetDirectories();

            if (dis.Length > )

            {

                for (int i = ; i < dis.Length; i++)

                {

                    size += GetDirectorySize(dis[i].FullName);

                }

            }

            return size;

        }