ASP.NET计算日期间隔天数

方法一

DateTime t1 = Convert.ToDateTime("2006-1-6");

DateTime t2 = Convert.ToDateTime("2006-1-16");

int day=Math.Abs(((TimeSpan)(t1 - t2)).Days);

方法二

datediff(day,date1,date2)

方法三

DateTime oldDate = new DateTime(2002,7,15);

DateTime newDate = DateTime.Now;

// Difference in days, hours, and minutes.

TimeSpan ts = newDate - oldDate;

// Difference in days.

int differenceInDays = ts.Days;

Console.WriteLine("Difference in days: {0} ", differenceInDays);