znyc.cloudcar.admin.api/Znyc.Cloudcar.Admin.Commons/Extend/Extlong.cs

namespace Znyc.Cloudcar.Admin.Commons.Extend
{
    /// <summary>
    ///     �ļ���С���ϴ���ļ�
    /// </summary>
    public static class Extlong
    {
        /// <summary>
        ///     ��ʾ�ļ���С
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string ToDisplayFileSize(this long value)
        {
            if (value < 1000)
            {
                return string.Format("{0} Byte", value);
            }

            if (value >= 1000 && value < 1000000)
            {
                return string.Format("{0:F2} Kb", (double)value / 1024);
            }

            if (value >= 1000 && value < 1000000000)
            {
                return string.Format("{0:F2} M", (double)value / 1048576);
            }

            if (value >= 1000000000 && value < 1000000000000)
            {
                return string.Format("{0:F2} G", (double)value / 1073741824);
            }

            return string.Format("{0:F2} T", (double)value / 1099511627776);
        }
    }
}