Question

我需要计算一些日期范围。

我有三个日期范围：

7月25日11日至10月10日
05 Aug 11 - 05 Oct 10

8月20日 - 11月8日11月

我需要为

之前和之后的所有有效期创建新的成员资格

这样做的好方法是什么？

代码示例

       public enum MembershipType
       {
          Gym=1,
          Magazine=2,
          Hotel=3
       }
       class Program
       {
          static void Main()
          {
             // During  1st Aug 2011 and 20th Oct 2011 Membership payment must be stopped
             var stopPaymentStartDate  =  new DateTime(2011,08,1);
             var stopPaymentEndDate    =  new DateTime(2011,10,20);


             var gymMembership = new Membership{MembershipType=MembershipType.Gym, StartDate = new DateTime(2011, 07, 25), EndDate = new DateTime(2011, 10, 10)};
             var magazineMembership = new Membership{MembershipType = MembershipType.Magazine,StartDate = new DateTime(2011, 08, 5),EndDate = new DateTime(2011, 10, 5)};
             var hotelMembership = new Membership{MembershipType = MembershipType.Hotel,StartDate = new DateTime(2011, 08, 20),EndDate = new DateTime(2011, 11, 8)};

             //How Can I get the wanted result below:
             //???

             //Wanted List of result as follows:
             var gymMembershipResult = new Result{MembershipType = MembershipType.Gym,StartDate = new DateTime(2011, 10, 10),EndDate = new DateTime(2011, 10, 20)};
             var magazineMembershipResultOne = new Result { MembershipType = MembershipType.Magazine, StartDate = new DateTime(2011, 08, 01), EndDate = new DateTime(2011, 08,05) };
             var magazineMembershipResultTwo = new Result { MembershipType = MembershipType.Magazine, StartDate = new DateTime(2011, 10, 05), EndDate = new DateTime(2011, 10, 20) };
             var hotelMembershipResult = new Result { MembershipType = MembershipType.Hotel, StartDate = new DateTime(2011, 08, 01), EndDate = new DateTime(2011, 08, 20) };

          }
       }
       public class Result
       {
          public DateTime StartDate { get; set; }
          public DateTime EndDate { get; set; }
          public MembershipType MembershipType { get; set; }
       }
       public class Membership
       {
          public DateTime StartDate { get; set; }
          public DateTime EndDate { get; set; }
          public MembershipType MembershipType { get; set; }
       }
    }

Answer 1

class Program
{
    static void Main(string[] args)
    {
        DateTime stopPaymentStartDate = new DateTime(2011, 08, 1);
        DateTime stopPaymentEndDate = new DateTime(2011, 10, 20);

        MembershipPeriod gymMembership = new MembershipPeriod 
        { 
            MembershipType = MembershipType.Gym, 
            StartDate = new DateTime(2011, 07, 25), 
            EndDate = new DateTime(2011, 10, 10) 
        };

        MembershipPeriod magazineMembership = new MembershipPeriod 
        { 
            MembershipType = MembershipType.Magazine, 
            StartDate = new DateTime(2011, 08, 5), 
            EndDate = new DateTime(2011, 10, 5) 
        };

        MembershipPeriod hotelMembership = new MembershipPeriod
        { 
            MembershipType = MembershipType.Hotel, 
            StartDate = new DateTime(2011, 08, 20), 
            EndDate = new DateTime(2011, 11, 8) 
        };

        List<MembershipPeriod> resultsGym = GetResultsForPeriod(gymMembership, stopPaymentStartDate, stopPaymentEndDate);
        List<MembershipPeriod> resultsmagazine = GetResultsForPeriod(magazineMembership, stopPaymentStartDate, stopPaymentEndDate);
        List<MembershipPeriod> resultshotel = GetResultsForPeriod(hotelMembership, stopPaymentStartDate, stopPaymentEndDate);
    }

    private static List<MembershipPeriod> GetResultsForPeriod(MembershipPeriod period, DateTime stopPaymentStartDate, DateTime stopPaymentEndDate)
    {
        List<DateTime> datesToKeep = new List<DateTime>();

        for (DateTime date = stopPaymentStartDate.Date; date <= stopPaymentEndDate.Date; date = date.AddDays(1))
        {
            if (date <= period.StartDate.Date || date >= period.EndDate.Date)
            {
                datesToKeep.Add(date);
            }
        }

        List<MembershipPeriod> results = new List<MembershipPeriod>();
        MembershipPeriod newPeriod = null;

        for (int i = 0; i < datesToKeep.Count; i++)
        {
            if (newPeriod == null)
            {
                newPeriod = new MembershipPeriod();
                newPeriod.MembershipType = period.MembershipType;
                newPeriod.StartDate = datesToKeep[i];
            }

            if (i == datesToKeep.Count - 1 || (datesToKeep[i + 1] - datesToKeep[i]).Days > 1)
            {
                newPeriod.EndDate = datesToKeep[i];
                results.Add(newPeriod);
                newPeriod = null;
            }
        }

        return results;
    }
}

public enum MembershipType 
{ 
    Gym = 1, 
    Magazine = 2, 
    Hotel = 3 
}

public class MembershipPeriod 
{ 
    public DateTime StartDate 
    { 
        get; 
        set; 
    } 

    public DateTime EndDate 
    { 
        get; 
        set; 
    } 

    public MembershipType MembershipType 
    { 
        get; 
        set; 
    } 
}

日期范围计算。任何建议？

1 个答案: