如何在C#中获得正确的时间戳

Question

I would like to get valid timestamp in my application so I wrote:

public static String GetTimestamp(DateTime value)
{
    return value.ToString("yyyyMMddHHmmssffff");
}
//  ...later on in the code
String timeStamp = GetTimestamp(new DateTime());
Console.WriteLine(timeStamp);

output:

000101010000000000

I wanted something like:

20140112180244

What have I done wrong?

Answer 1

Your mistake is using new DateTime() , which returns January 1, 0001 at 00:00:00.000 instead of current date and time. The correct syntax to get current date and time is DateTime.Now , so change this:

String timeStamp = GetTimestamp(new DateTime());

to this:

String timeStamp = GetTimestamp(DateTime.Now);

Answer 2

var Timestamp = new DateTimeOffset(DateTime.UtcNow).ToUnixTimeSeconds();

Answer 3

var timestamp = DateTime.Now.ToFileTime();

//output: 132260149842749745

This is an alternative way to individuate distinct transactions. It's not unix time, but windows filetime.

From the docs :

A Windows file time is a 64-bit value that represents the number of 100- 
nanosecond intervals that have elapsed since 12:00 midnight, January 1, 1601 
A.D. (C.E.) Coordinated Universal Time (UTC).

Answer 4

For UTC :

string unixTimestamp = Convert.ToString((int)DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds);

For local system :

string unixTimestamp = Convert.ToString((int)DateTime.Now.Subtract(new DateTime(1970, 1, 1)).TotalSeconds);

Answer 5

Int32 unixTimestamp = (Int32)(TIME.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;

“TIME”是您想要获取其 Unix 时间戳的 DateTime 对象。

Answer 6

internal static string UnixToDate(int Timestamp, string ConvertFormat)
{
    DateTime ConvertedUnixTime = DateTimeOffset.FromUnixTimeSeconds(Timestamp).DateTime;
    return ConvertedUnixTime.ToString(ConvertFormat);
}

int Timestamp = (int)DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds;

Usage:

UnixToDate(1607013172, "HH:mm:ss"); // Output 16:32:52
Timestamp; // Output 1607013172