How to get unix timestamp in C#
By FoxLearn 11/23/2024 1:49:33 AM 624
A Unix timestamp, also known as a POSIX timestamp or epoch time, is a way of representing a specific point in time. It counts the number of seconds that have passed since January 1, 1970, at 00:00:00 UTC.
How to convert timestamp to Unix time in C#?
In C#, you can get a Unix timestamp by using DateTime.UtcNow
and subtracting the Unix epoch time (January 1, 1970). This gives you the number of seconds between the current UTC time and the Unix epoch.
For example unix timestamp format:
1633024800
(which corresponds to October 1, 2021, 00:00:00 UTC).
You can use DateTimeOffset
and ToUnixTimeSeconds()
to get unix timestamp in C#
// Get the current DateTimeOffset DateTimeOffset dto = DateTimeOffset.Now; // Convert to Unix timestamp (seconds since Jan 1, 1970) long unixTime = dto.ToUnixTimeSeconds(); // Unix timestamp (seconds): 1720687008
Uses DateTimeOffset
which directly provides the ToUnixTimeSeconds()
method to get the Unix timestamp.
You can also use DateTime
and manual calculation to get unix timestamp in C#
// Get the current DateTime in UTC DateTime dt = DateTime.UtcNow; // Convert to Unix timestamp (seconds since Jan 1, 1970) long unixTimeStamp = (long)(dt.Subtract(new DateTime(1970, 1, 1))).TotalSeconds; // Unix timestamp (seconds): 1720687153
You can replace DateTime.UtcNow
with any DateTime
object to get the Unix timestamp for that specific date and time.
Uses DateTime.UtcNow
to get the current UTC time, subtracts the Unix epoch (January 1, 1970 UTC), and converts the resulting TimeSpan
to seconds.
How to convert seconds unix timestamp to DateTimeOffset type (UTC)
// Unix timestamp in seconds long unixTimestamp = 1720687153; // Replace with your Unix timestamp // Convert Unix timestamp to DateTimeOffset DateTimeOffset dateTimeOffset = DateTimeOffset.FromUnixTimeSeconds(unixTimestamp); // Convert to UTC DateTimeOffset utcDateTimeOffset = dateTimeOffset.ToUniversalTime(); // Output the DateTimeOffset (UTC): 2024-07-11 08:39:13 +00:00 Console.WriteLine(dateTimeOffset.ToString("yyyy-MM-ddTHH:mm:ss.fffK"));
How to convert milliseconds unix timestamp to DateTimeOffset type (UTC)
// Example Unix timestamp in milliseconds long unixTimestampMilliseconds = 1720687153000; // Replace this with your Unix timestamp in milliseconds // Create DateTimeOffset object in UTC DateTimeOffset dateTimeOffset = DateTimeOffset.FromUnixTimeMilliseconds(unixTimestampMilliseconds); // Ensure it's in UTC dateTimeOffset = dateTimeOffset.ToUniversalTime(); // Output the DateTimeOffset UTC: 2024-07-11T08:39:13.000+00:00 Console.WriteLine(dateTimeOffset.ToString("yyyy-MM-ddTHH:mm:ss.fffK"));
How to convert current UTC time to unix timestamp in seconds
// Example Unix timestamp in seconds: 1720688109 long unixTimestampSeconds = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
How to convert current UTC time to unix timestamp in milliseconds
// Example Unix timestamp in milli seconds: 1720688075851 long unixTimestampMilliseconds = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();