C # datetime and Timestamp conversions

Original: C # datetime and Timestamp conversions

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 2.1 C # datetime 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; Number of 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 3.1 C # datetime 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; Number of seconds 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"));

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C # datetime and Timestamp conversions