C segundos desde la fecha específica

Question

En C# 3.0, ¿cómo obtengo los segundos desde el 1/1/2010?

Answer 1

es la siguiente:

TimeSpan test = DateTime.Now - new DateTime(2010, 01, 01); 
    MessageBox.Show(test.TotalSeconds.ToString()); 

Por un divertido forro:

MessageBox.Show((DateTime.Now - new DateTime(2010, 01, 01)) 
    .TotalSeconds.ToString()); 

Answer 2

Puede restar 2 instancias DateTime y obtener un intervalo de tiempo:

DateTime date = new DateTime(2010,1,1); 
TimeSpan diff = DateTime.Now - date; 
double seconds = diff.TotalSeconds; 

Answer 3

sólo para evitar problemas de zona horaria

TimeSpan t = (DateTime.UtcNow - new DateTime(2010, 1, 1)); 

int timestamp = (int) t.TotalSeconds; 

Console.WriteLine (timestamp); 

Answer 4

protected void Page_Load(object sender, EventArgs e) 
{ 
    SecondsSinceNow(new DateTime(2010, 1, 1, 0, 0, 0)); 
} 

private double SecondsSinceNow(DateTime compareDate) 
{ 
    System.TimeSpan timeDifference = DateTime.Now.Subtract(compareDate); 
    return timeDifference.TotalSeconds; 
} 

Answer 5

DateTime t1 = DateTime.Now; 
DateTime p = new DateTime(2010, 1, 1); 

TimeSpan d = t1 - p; 

long s = (long)d.TotalSeconds; 
MessageBox.Show(s.ToString()); 

Answer 6

Es realmente una cuestión de cuyos 2010-Ene-01 que está utilizando y si desea o no tener en cuenta el horario de verano.

//I'm currently in Central Daylight Time (Houston, Texas) 
DateTime jan1 = new DateTime(2010, 1, 1); 

//days since Jan1 + time since midnight 
TimeSpan differenceWithDaylightSavings = DateTime.Now - jan1; 

//one hour less than above (we "skipped" those 60 minutes about a month ago) 
TimeSpan differenceWithoutDaylightSavings = (DateTime.UtcNow - jan1.ToUniversalTime()); 

//difference for those using UTC and 2010-Jan-01 12:00:00 AM UTC as their starting point 
// (today it's 5 hours longer than differenceWithDaylightSavings) 
TimeSpan utcDifference = (DateTime.UtcNow - new DateTime(2010, 1, 1)); 

 
Difference with Daylight Savings:  105.15:44:09.7003571 
Difference without Daylight Savings: 105.14:44:09.7003571 
UTC Difference:      105.20:44:09.7003571 

para obtener los segundos, utilice la propiedad TotalSeconds fuera del objeto TimeSpan.