c# - Getting number of days in a month

Question

I have a comboBox with all of the months in it.

What I need to know is the number of days in the chosen month.

var month = cmbMonth.SelectedIndex + 1;
DateTime date = Convert.ToDateTime(month);

So if a user selects January, I need to save 31 to a variable.

Answer 1

You want DateTime.DaysInMonth:

int days = DateTime.DaysInMonth(year, month);

Obviously it varies by year, as sometimes February has 28 days and sometimes 29. You could always pick a particular year (leap or not) if you want to "fix" it to one value or other.