【C#】时间日期格式转换：long和DateTime相互转换

// DateTime --> long

public static long ConvertDateTimeToLong(DateTime dt)

{

    DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));

    TimeSpan toNow = dt.Subtract(dtStart);

    long timeStamp = toNow.Ticks;

    timeStamp = long.Parse(timeStamp.ToString().Substring(0, timeStamp.ToString().Length - 4));

    return timeStamp;

}

// long --> DateTime

public static DateTime ConvertLongToDateTime(long d)

{

    DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));

    long lTime = long.Parse(d + "0000");

    TimeSpan toNow = new TimeSpan(lTime);

    DateTime dtResult = dtStart.Add(toNow);

    return dtResult;

}

测试 long –> DateTime：

string time = "1490782464000";

DateTime dt = TimeUtils.ConvertLongToDateTime(long.Parse(time ));

System.Console.WriteLine(dt.ToString());

输出：

2017/3/29 星期三 下午 6:14:24