The system time and UNIX time stamp in C are converted to each other

In the process of project development, sometimes different programs call data to each other, and the data will inevitably contain time. For example, ASP. NET calls PHP, which requires 1 processing when it comes to time. PHP programs generally access UNIX time, unlike ASP. NET, which stores years, months, days, hours and seconds, so it needs to do 1 down conversion. The code is as follows:

1. Convert system time to UNIX timestamp

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

DateTime dtNow = DateTime.Parse(DateTime.Now.ToString());

TimeSpan toNow = dtNow.SuBTract(dtStart);

string timeStamp = toNow.Ticks.ToString();

timeStamp = timeStamp.Substring(0,timeStamp.Length - 7);

2. Convert UNIX timestamp to system time

string timeStamp = "1288368000";

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

long lTime = long.Parse(timeStamp + "0000000");

TimeSpan toNow = new TimeSpan(lTime);

DateTime dtResult = dtStart.Add(toNow);

These two methods are relatively simple, so you can encapsulate them into static functions and call them directly.