How to get time difference between two Datetime variables in C#

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1

I have two variables DateTime, which are Datacadastro and DataAtual(DateTime.Now). I need to know if the time difference between these two dates is greater than or equal to 4 hours. Is there any method in the class DateTime that meets my requirement? Or I need another alternative?

c# .net datetime

2 answers

6


You need to use TimeSpan for that reason.

Example:

using System;
using static System.Console;

public class Program
{
    public static void Main()
    {
        var dt1 = DateTime.Now;
        var dt2 = new DateTime(2015, 09, 22, 00, 50, 00);

        TimeSpan ts = dt1 - dt2;

        WriteLine($"Diferença em horas {ts.TotalHours}");
        WriteLine($"Diferença em minutos {ts.TotalMinutes}");
        WriteLine($"Diferença em dias {ts.TotalDays}");            
        WriteLine($"Diferença maior que 4 horas: {ts.TotalHours >= 4}");
    }
}

See working on .Net fiddle

5

It’s quite simple:

using System;
using static System.Console;

public class Program {
    public static void Main() {
        var data1 = DateTime.Now;
        var data2 = new DateTime(2015, 9, 23);
        WriteLine($"Diferença: {data1 - data2}");
        WriteLine($"Mais que 4 horas: {data1 - data2 >= new TimeSpan(4, 0, 0)}");
        WriteLine($"Mais que 4 horas (outra forma): {(data1 - data2).TotalHours >= 4}");
        WriteLine($"Mais que 4 horas (se primeira pode ser anterior): {Math.Abs((data2 - data1).TotalHours) >= 4}");
        WriteLine($"Mais que 4 horas (se primeira é anterior): {-(data2 - data1).TotalHours >= 4}");
    }
}

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

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