PT
C# / .NET - obter carimbo de data / hora atual.
3
points
Neste artigo, veremos como obter o registro de data e hora atual em C# / .NET.
Existem duas maneiras disponíveis de se fazer isso: use métodos predefinidos ou formatação personalizada.
Solução rápida:
DateTimeOffset now = (DateTimeOffset)DateTime.UtcNow; // using System;
Console.WriteLine(now.ToUnixTimeSeconds()); // .NET 4.6
Nota: leia este artigo para ver exemplos da ISO 8601.
Vá para as seções abaixo para ver mais exemplos:
1. Exemplo de tempo Unix personalizado em segundos
Se queremos ter um código fonte que funcione com estruturas .net mais antigas, devemos usar esta solução:
using System;
public static class TimeUtils
{
public static int ToUnixTimeSeconds(DateTime date)
{
DateTime point = new DateTime(1970, 1, 1);
TimeSpan time = date.Subtract(point);
return (int)time.TotalSeconds;
}
public static int ToUnixTimeSeconds()
{
return ToUnixTimeSeconds(DateTime.UtcNow);
}
}
// Usage example:
public class Program
{
public static void Main()
{
Console.WriteLine(TimeUtils.ToUnixTimeSeconds());
}
}
Resultado:
1565641706
2. Exemplo de carimbo de data e hora do .NET 4.6 API Unix
O .net 4.6 introduziu um método especial que retorna o carimbo de data / hora do Unix.
using System;
public class Program
{
public static void Main()
{
DateTimeOffset now = (DateTimeOffset)DateTime.UtcNow;
Console.WriteLine(now.ToUnixTimeSeconds());
}
}
Resultado:
1565642183
3. Exemplo predefinido de métodos da classe DateTime
Os métodos predefinidos disponíveis no .net retornam os formatos de hora mais usados.
Nota: é muito importante consultar o CultureInfo atualmente usado para saber que tipo de formatação é usada por padrão. É possível chamar o método string com a cultura desejada.
using System;
using System.Globalization;
public class Program
{
public static void Main()
{
DateTime now = DateTime.Now;
CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
Console.WriteLine(now.ToBinary()); // -8586359643687607670
Console.WriteLine(now.ToFileTime()); // 132101161167168138
Console.WriteLine(now.ToFileTimeUtc()); // 132101161167168138
Console.WriteLine(now.ToLocalTime()); // 08/12/2019 21:41:56
Console.WriteLine(now.ToLongDateString()); // Monday, 12 August 2019
Console.WriteLine(now.ToLongTimeString()); // 21:41:56
Console.WriteLine(now.ToOADate()); // 43689.9041286574
Console.WriteLine(now.ToShortDateString()); // 08/12/2019
Console.WriteLine(now.ToShortTimeString()); // 21:41
Console.WriteLine(now.ToString()); // 08/12/2019 21:41:56
}
}
Resultado:
-8586359643687607670
132101161167168138
132101161167168138
08/12/2019 21:41:56
Monday, 12 August 2019
21:41:56
43689.9041286574
08/12/2019
21:41
08/12/2019 21:41:56
Nota: A propriedade CultureInfo.CurrentCulture causa formatação de seqüência específica para números, moedas, hora, etc.
4. ToString método com exemplo de formato personalizado
Nesta seção, apresentamos como usar o formato personalizado para imprimir data e hora formatadas - o formato pode ser modificado, se necessário.
using System;
using System.Globalization;
public class Program
{
public static void Main()
{
DateTime dt = new DateTime(2018, 2, 15, 8, 21, 34, 547);
CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
Console.WriteLine(dt.ToString("dddd, dd MMMM yyyy HH:mm")); // e.g. 1
Console.WriteLine(dt.ToString("dddd, dd MMMM yyyy HH:mm tt")); // e.g. 2
}
}
Resultado:
Thursday, 15 February 2018 08:21 // e.g. 1
Thursday, 15 February 2018 08:21 AM // e.g. 2
Para diferentes formatos ToString, os resultados são os seguintes:
/*
FORMAT RESULT EXAMPLE NUMBER
dddd, dd MMMM yyyy HH:mm Thursday, 15 February 2018 08:21 1
dddd, dd MMMM yyyy HH:mm tt Thursday, 15 February 2018 08:21 AM 2
dddd, dd MMMM yyyy HH:mm:ss Thursday, 15 February 2018 08:21:34 3
dddd, dd MMMM yyyy HH:mm:ss tt Thursday, 15 February 2018 08:21:34 AM 4
dddd, dd MMMM yyyy H:mm Thursday, 15 February 2018 8:21 5
dddd, dd MMMM yyyy H:mm tt Thursday, 15 February 2018 8:21 AM 6
dddd, dd MMMM yyyy H:mm:ss Thursday, 15 February 2018 8:21:34 7
dddd, dd MMMM yyyy H:mm:ss tt Thursday, 15 February 2018 8:21:34 AM 8
dddd, dd MMMM yyyy hh:mm Thursday, 15 February 2018 08:21 9
dddd, dd MMMM yyyy hh:mm tt Thursday, 15 February 2018 08:21 AM 10
dddd, dd MMMM yyyy hh:mm:ss Thursday, 15 February 2018 08:21:34 11
dddd, dd MMMM yyyy hh:mm:ss tt Thursday, 15 February 2018 08:21:34 AM 12
dddd, dd MMMM yyyy h:mm Thursday, 15 February 2018 8:21 13
dddd, dd MMMM yyyy h:mm tt Thursday, 15 February 2018 8:21 AM 14
dddd, dd MMMM yyyy h:mm:ss Thursday, 15 February 2018 8:21:34 15
dddd, dd MMMM yyyy h:mm:ss tt Thursday, 15 February 2018 8:21:34 AM 16
MM/dd/yyyy HH:mm 02/15/2018 08:21 17
MM/dd/yyyy HH:mm tt 02/15/2018 08:21 AM 18
MM/dd/yyyy HH:mm:ss 02/15/2018 08:21:34 19
MM/dd/yyyy HH:mm:ss tt 02/15/2018 08:21:34 AM 20
MM/dd/yyyy H:mm 02/15/2018 8:21 21
MM/dd/yyyy H:mm tt 02/15/2018 8:21 AM 22
MM/dd/yyyy H:mm:ss 02/15/2018 8:21:34 23
MM/dd/yyyy H:mm:ss tt 02/15/2018 8:21:34 AM 24
MM/dd/yyyy hh:mm 02/15/2018 08:21 25
MM/dd/yyyy hh:mm tt 02/15/2018 08:21 AM 26
MM/dd/yyyy hh:mm:ss 02/15/2018 08:21:34 27
MM/dd/yyyy hh:mm:ss tt 02/15/2018 08:21:34 AM 28
MM/dd/yyyy h:mm 02/15/2018 8:21 29
MM/dd/yyyy h:mm tt 02/15/2018 8:21 AM 30
MM/dd/yyyy h:mm:ss 02/15/2018 8:21:34 31
dddd, dd MMMM yy Thursday, 15 February 18 32
dddd, dd MMMM yyyy Thursday, 15 February 2018 33
MM/dd/yy 02/15/18 34
MM/dd/yyyy 02/15/2018 35
MMMM dd February 15 36
yy-MM-dd 18-02-15 37
yyyy-MM-dd 2018-02-15 38
yy.MM.dd 18.02.15 39
yyyy.MM.dd 2018.02.15 40
dd.MM.yy 15.02.18 41
dd.MM.yyyy 15.02.2018 42
yyyy MMMM 2018 February 43
ddd, MMM d, yyyy Thu, Feb 15, 2018 44
dddd, MMMM d, yyyy Thursday, February 15, 2018 45
yyyy-MM-ddTHH:mm:ss 2018-02-15T08:21:34 46
yyyy-MM-ddTHH:mm:ss.fffffffK 2018-02-15T08:21:34.5470000 47
yyyyMMddHHmmss 20180215082134 48
yyyyMMddHHmmssfffffff 201802150821345470000 49
ddd, dd MMM yyy HH:mm:ss 'GMT' Thu, 15 Feb 2018 08:21:34 GMT 50
HH:mm 08:21 51
HH:mm tt 08:21 AM 52
HH:mm:ss 08:21:34 53
HH:mm:ss tt 08:21:34 AM 54
H:mm 8:21 55
H:mm tt 8:21 AM 56
H:mm:ss 8:21:34 57
H:mm:ss tt 8:21:34 AM 58
hh:mm 08:21 59
hh:mm tt 08:21 AM 60
hh:mm:ss 08:21:34 61
hh:mm:ss tt 08:21:34 AM 62
h:mm 8:21 63
h:mm tt 8:21 AM 64
h:mm:ss 8:21:34 65
Where:
H - 0-23 hours
HH - 00-23 hours (zeros are printed to keep two places)
h - 0-12 hours
hh - 00-12 hours (zeros are printed to keep two places)
mm - 00-59 minutes (zeros are printed to keep two places)
ss - 00-59 seconds (zeros are printed to keep two places)
tt - AM or PM
fffffff - second fraction
fffffffK - second fraction
d - day of month number
dd - day of month number (zeros are printed to keep two places)
ddd - short day name
dddd - long day name
MM - month number (zeros are printed to keep two places)
MMM - short month name
MMMM - long month name
yy - 00-99 year (zeros are printed to keep two places)
yyy - 00-999 year (zeros are printed to keep two places)
yyyy - 00-9999 year (zeros are printed to keep two places)
Charactes that are not interpreted: T - : . ,
'text' - single apostrophe does not interpret text inside e.g. 'GMT' as GMT
*/