Getting time difference between two values

Question

In my application I have 4 TextBoxes, and 2 TextBoxes to enter the start-time, and 2 TextBoxes to enter end-time.

The user will always enter a completed time, so the input will always be 11:30, 12:45, and so on.

How can I get the difference in hours and minutes between start and endtime?

Answer 1

use TimeSpan, no need to use dates

var start = TimeSpan.Parse(start.Text);
var end = TimeSpan.Parse(end.Text);

TimeSpan result = end - start;
var diffInMinutes = result.TotalMinutes();

Answer 2

Use TimeSpan class, and Subtract method of DateTime.

        DateTime t1 = Convert.ToDateTime(textBox1.Text);
        DateTime t2 = Convert.ToDateTime(textBox2.Text);
        TimeSpan ts = t1.Subtract(t2);