Instance code for datetime and timestamp conversions in C #

This article mainly introduces the C # datetime and timestamp conversion instance, small series feel very good, and now share to everyone, but also for everyone to do a reference. Let's take a look at it with a little knitting.

C # datetime-to-timestamp conversions, including JavaScript timestamps and Unix timestamps.

1. What is a timestamp

The first thing to know is the difference between JavaScript and UNIX timestamps:

JavaScript Timestamp: GMT January 01, 1970 00:00 00 seconds (Beijing time January 01, 1970 08:00 00 seconds) up to now the total number of milliseconds.

Unix Timestamp: GMT January 01, 1970 00:00 00 seconds (Beijing time January 01, 1970 08:00 00 seconds) up to now the total number of seconds.

You can see the total number of milliseconds for the JavaScript timestamp, and the Unix timestamp is the total number of seconds.

Like the same thing. 2016/11/03 12:30:00, converted to a JavaScript timestamp of 1478147400000, and converted to a Unix timestamp of 1478147400.

2. JavaScript timestamps convert each other

2.1 C # DateTime conversion to JavaScript timestamp

System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime (new System.DateTime (1970, 1, 1)); // local time zone

long timeStamp = (long) (DateTime.Now-startTime) .TotalMilliseconds; // difference milliseconds

System.Console.WriteLine (timeStamp);

2.2 JavaScript timestamp conversion to C # DateTime

long jsTimeStamp = 1478169023479;

System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime (new System.DateTime (1970, 1, 1)); // local time zone

DateTime dt = startTime.AddMilliseconds (jsTimeStamp);

System.Console.WriteLine (dt.ToString ("yyyy / MM / dd HH: mm: ss: ffff"));

3. UNIX timestamps convert each other

3.1 C # datetime conversion to UNIX timestamp

System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime (new System.DateTime (1970, 1, 1)); // local time zone

long timeStamp = (long) (DateTime.Now-startTime) .TotalSeconds; // seconds difference

System.Console.WriteLine (timeStamp);

3.2 Unix timestamp conversion to C # DateTime

long unixTimeStamp = 1478162177;

System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime (new System.DateTime (1970, 1, 1)); // local time zone

DateTime dt = startTime.AddSeconds (unixTimeStamp);

System.Console.WriteLine (dt.ToString ("yyyy / MM / dd HH: mm: ss: ffff"));