Check if datetime instance falls in between other two datetime objects

问题

I would like to know a simple algorithm to check if the given instance of datetime lies between another two instances in C#.

Note:

I skimmed though this How do I check if a given datetime object is "between" two datetimes? and it was for python and many more for php. Most of the other questions were regarding difference between the two.

Details:

I am more specific about the time, date does not matter to me. For example i got DataBase entry for a staff who works between 10:00 Am - 9:00 Pm and me as principal[for example] would like to know which staff is engaged in class at the given time like 2:00 Pm. Now this would return me the staff\'s details who are engaged at this time.

回答1:

DateTime.Ticks will account for the time. Use .Ticks on the DateTime to convert your dates into longs. Then just use a simple if stmt to see if your target date falls between.

// Assuming you know d2 > d1
if (targetDt.Ticks > d1.Ticks && targetDt.Ticks < d2.Ticks)
{
    // targetDt is in between d1 and d2
}

回答2:

Do simple compare > and <.

if (dateA>dateB && dateA<dateC)
    //do something

If you care only on time:

if (dateA.TimeOfDay>dateB.TimeOfDay && dateA.TimeOfDay<dateC.TimeOfDay)
    //do something

回答3:

You can use:

if ((DateTime.Compare(dateToCompare, dateIn) == 1) && (DateTime.Compare(dateToCompare, dateOut) == 1)
{
   //do code here
}

if ((dateToCompare.CompareTo(dateIn) == 1) && (dateToCompare.CompareTo(dateOut) == 1))
{
   //do code here
}

回答4:

Write yourself a Helper function:

public static bool IsBewteenTwoDates(this DateTime dt, DateTime start, DateTime end)
{
    return dt >= start && dt <= end;
}

Then call: .IsBewteenTwoDates(DateTime.Today ,new DateTime(,,));

回答5:

You can, use:

if (date >= startDate && date<= EndDate) { return true; }

来源：https://stackoverflow.com/questions/5672862/check-if-datetime-instance-falls-in-between-other-two-datetime-objects

标签

ASP.NET

datetime

timespan