using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace HuizhongLibrary
{
    public static class DateUtils
    {
        public static long ToTimestamp(this DateTime dateTime)
        {
            DateTime historyDate = new DateTime(1970, 1, 1);
            long timestamp = (dateTime.Ticks - historyDate.Ticks) / 10000000 - 8 * 60 * 60;
            return timestamp;
        }

        public static DateTime ToDateTime(this long timestamp)
        {
            DateTime historyDate = new DateTime(1970, 1, 1);
            long timeTicks = (timestamp + 8 * 60 * 60) * 10000000 + historyDate.Ticks;
            return DateTime.FromBinary(timeTicks);
        }

        /// <summary>
        /// 获取北京时间
        /// </summary>
        /// <returns></returns>
        public static DateTime GetBJNow()
        {
            return DateTime.Now.ToUniversalTime().AddHours(8);
        }
    }
}