Question

我正在使用List，其中AccountInformation有三个属性

public class AccountInformation 
{
        public string AccountNumber{ get; set; }
        public int StartDate { get; set; }
        public int EndDate{ get; set; }
}

现在我的数据列表就像这样

AccountNumber  StartDate   EndDate
 AC1           20150101    20150110
 AC1           20150110    20150111
 AC1           20150111    20150112
 AC2           20150112    20150115
 AC1           20150116    20150120
 AC1           20150121    20150125
 AC2           20150125    20150130
 AC2           20150130    20150205

现在我需要以下面的方式将这些数据作为最终输出

 AccountNumber  StartDate   EndDate
 AC1           20150101    20150111
 AC2           20150112    20150115
 AC1           20150116    20150120
 AC1           20150121    20150125
 AC2           20150125    20150005

意味着无论我将连续的AccountNumber视为相同而第一行的EndDate与下一行的StartDate相同，我需要合并这些行。

感谢任何帮助。

Answer 1

class Program
{
    public class AccountInformation
    {
        public string AccountNumber { get; set; }
        public int StartDate { get; set; }
        public int EndDate { get; set; }
    }

    static void Main(string[] args)
    {
        List<AccountInformation> accounts = new List<AccountInformation>();
        accounts.Add(new AccountInformation() { AccountNumber = "AC1", StartDate = 20150101, EndDate = 20150110 });
        accounts.Add(new AccountInformation() { AccountNumber = "AC1", StartDate = 20150110, EndDate = 20150111 });
        accounts.Add(new AccountInformation() { AccountNumber = "AC1", StartDate = 20150111, EndDate = 20150112 });
        accounts.Add(new AccountInformation() { AccountNumber = "AC2", StartDate = 20150112, EndDate = 20150115 });
        accounts.Add(new AccountInformation() { AccountNumber = "AC1", StartDate = 20150116, EndDate = 20150120 });
        accounts.Add(new AccountInformation() { AccountNumber = "AC1", StartDate = 20150121, EndDate = 20150125 });
        accounts.Add(new AccountInformation() { AccountNumber = "AC2", StartDate = 20150125, EndDate = 20150130 });
        accounts.Add(new AccountInformation() { AccountNumber = "AC2", StartDate = 20150130, EndDate = 20150205 });

        List<AccountInformation> newAccounts = new List<AccountInformation>();
        AccountInformation previousAccount = null;
        bool continous = false;
        for (int index=0;index<accounts.Count;index++)
        {

            if (null != previousAccount)
            {
                if (accounts[index].AccountNumber.Equals(previousAccount.AccountNumber) &&
                    accounts[index].StartDate == previousAccount.EndDate)
                {
                    continous = true;
                    if (!(continous && newAccounts.Count>0))
                    {
                        newAccounts.Add(previousAccount);
                    }
                }
                else
                {
                    continous = false;
                    newAccounts.Add(accounts[index]);
                }
            }
            previousAccount = accounts[index];
        }
    }
}

Answer 2

int outer = 0;

while (outer < accInfo.Count - 1)
{
    if (accInfo[outer].AccountNumber == accInfo[outer + 1].AccountNumber && accInfo[outer].EndDate == accInfo[outer + 1].StartDate)
    {
        if (resultAccInfo.Count == 0)
        {
            resultAccInfo.Add(new AccountInformation()
            {
                AccountNumber = accInfo[outer].AccountNumber,
                StartDate = accInfo[outer].StartDate,
                EndDate = accInfo[outer + 1].EndDate
            });
        }

        else
        {
            resultAccInfo[resultAccInfo.Count - 1].EndDate = accInfo[outer + 1].EndDate;
        }

        outer++;
    }
    else
    {
        resultAccInfo.Add(new AccountInformation()
        {
            AccountNumber = accInfo[outer + 1].AccountNumber,
            StartDate = accInfo[outer + 1].StartDate,
            EndDate = accInfo[outer + 1].EndDate
        });

        outer++;
    }
}

根据C＃中的属性从对象列表中获取合并数据

2 个答案: