Get time difference between two timespan in vb.net

Question

I have two variables :

Dim starttime As TimeSpan
Dim endtime As TimeSpan

My starttime value is : 02:30:00 (I mean 2.30AM)
2.30AM is nex

Answer 1

You need to use a DateTime variable to hold your start time and end time. Like this:

Dim startTime As New DateTime(2013, 9, 19, 10, 30, 0)     ' 10:30 AM today
Dim endTime As New DateTime(2013, 9, 20, 2, 0, 0)     ' 2:00 AM tomorrow

Dim duration As TimeSpan = endTime - startTime        'Subtract start time from end time

Console.WriteLine(duration)

Result:

15:30:00

UPDATE:

To convert that result to minutes, you can use the TotalMinutes property of the TimeSpan variable:

Console.WriteLine(duration.TotalMinutes)

Result:

930

Answer 2

You're confusing DateTime and TimeSpan. TimeSpan stores a duration, therefore anything about AM and PM is not relevant. If you want to compare two times, you should use DateTime and subtract them both, which will give you a TimeSpan.

You cannot give a TimeSpan a value of '2am', you you should use DateTime for that.

Consider:

var date1 = DateTime.Now.Date.AddHours(2); // pseudo code 2am
var date2 = DateTime.Now.Date.AddHours(11); // pseudo code 11am

var result = date2 - date1;

The result here is going to be a duration of 9 hours.

If you want it to be 2am the following day, you should include AddDays(1);

var date1 = DateTime.Now.Date.AddDays(1).AddHours(2); // pseudo code 2am the next day
var date2 = DateTime.Now.Date.AddHours(11); // pseudo code 11am

var result = date1 - date2;

The result here is going to be 15 hours.

Answer 3

HERE IS MY SOLUTION FOR DIFFERENCE IN HOURS

        'WORKS ONLY TIME SPAN WITHIN 48 HRS
        Dim HRS As TimeSpan
        Dim St As TimeSpan = TimeSpan.Parse(L_A_START.Text)
        Dim Cl As TimeSpan = TimeSpan.Parse(L_A_CLOSE.Text)

        HRS = Cl - St

        If HRS.Hours <= 0 Then
            HRS = (HRS + New TimeSpan(0, 24, 0, 0, 0))
        End If

        L_A_HRS.Text = HRS.ToString()