StringFormat Double Without Rounding

Question

double d = toDateTime.SelectedDateTime.Subtract(
              servicefromDateTime.SelectedDateTime).TotalHours;             
string s = String.Format("{0:0}",d); 

But String.Format rounds the value: if d is 22.91, String.Format gives the result of rounding 23. I do not want to round. For example, if d is 22.1222222, then I want 22. if d is 22.999999, then I want 22.

How can i achieve this?

Answer 1

You can use Math.Truncate

double d = toDateTime.SelectedDateTime.Subtract(servicefromDateTime.SelectedDateTime).TotalHours; 

string s = String.Format("{0:0}", Math.Truncate(d));

Answer 2

If you press double on int / long, it will chop off any decimal component, effectively giving you the "gender" or rounding of the double.

Answer 3

Then you need Math.Floor

double d = toDateTime.SelectedDateTime.Subtract(servicefromDateTime.SelectedDateTime).TotalHours;

string s = String.Format("{0:0}",Math.Floor(d));