How to parse Timezone Offset string?

Question

I retrieve a value from my database of a timeZone offset. The value that I get is in time.

For example, it could be "-5:00", "+7:30", "+3:00", etc.

How do I convert that to a double so I can do an AddHours() call on a DateTime object?

Answer 1

Use the TimeSpan.Parse method:

var time = "+7:30";
time = time.Replace("+", "");  // Remove the + if it is there.

var hours = TimeSpan.Parse(time).TotalHours;