C＃如何确定日期是否在180天之内

Question

How can I determine if a date is within 180 days?

I've been playing with DateTime.Compare below and using date1 +180 days (date1 is 28th August 2009 13:12)

DateTime.Compare(**date1**.AddDays(180), now) 

Is this correct?

Thanks

Jamie

Answer 1

DateTime.Now.Subtract(dt1).Days <= 180

Answer 2

if (Math.Abs(DateTime.Now.Subtract(date1).Days) <= 180)
{
    ...
}

This will let you know if date1 is within 180 days IN EITHER DIRECTION of right now - past or future. If you only need into the past, go with Developer Art 's answer .