帶有列表（T）屬性的類中具有列表（T）屬性的類

Question

我開始用C＃.NET編程。我爲工作人員製作了一個網絡日曆，他們可以查看他們因疾病，節假日等原因未上班多少天。 起初，我是用2個數組做的。一個與這些尺寸的完整的日曆：

calendar[person_code][month][day][6 items] -> calendar[int][int][int][object (starting absence date, type of absence, etc)]

另一種是用一個工人定義的數組一樣

person[person_code][13 items] -> person[int][13 string (name, surname, etc)]

我想做到這一點帶班來提高我的碼。我想上面的類：

public class absence 
{ 
    public int absenceCode { get; set; } 
    public int typeAbsence { get; set; } 
    public DateTime startingDate { get; set; } 
    public DateTime endingDate { get; set; } 
    public string description { get; set; } 
    public string state { get; set; } 

    public constructors... 
} 

public class calendar 
{ 
    public int day { get; set; } 
    public int month { get; set; } 
    public absence absen { get; set; } 

    public contructors.... 
} 

public class person 
{ 
    public int personCode { get; set; } 
    public string surname { get; set; } 
    public string name { get; set; } 
    public string address { get; set; } 
    public int maxHolidayDays { get; set; } 
    public calendar calend { get; set; } 

    public constructors.... 
} 

這是我的代碼，但我不知道如何處理設置，並像使用數組檢索信息。 我可以爲每個人創建一個新的實例，但我需要在獨特的一天創建一些缺席。 （一個工人可以缺勤一天有時） 我雖然有關使用列表（T）類像

List<person> = new List<person>(), and List<absence> = new List<absence>()

，但我怎麼可能設置嵌套在「日曆的一天List<absence>() 「班？ 我需要設置一個日曆日至極內部的名單初級講座的人從名單：/

List<person> -> calendar -> List<absence> 

我希望這是很清楚你。 此致敬禮。

Answer 1

我會這樣做。 1.Skip日曆類 2.In人缺席的添加類集合（如表） 3，如果您有IEnumerable的（如列表，人[]）你可以搜索數據，需要

public class absence 
{ 
    public int absenceCode { get; set; } 
    public int typeAbsence { get; set; } 
    public DateTime startingDate { get; set; } 
    public DateTime endingDate { get; set; } 
    public string description { get; set; } 
    public string state { get; set; } 
} 

public class person 
{ 
    public int personCode { get; set; } 
    public string surname { get; set; } 
    public string name { get; set; } 
    public string address { get; set; } 
    public int maxHolidayDays { get; set; } 
    // Initialize in constructor if you have an error 
    public List<absence> absences { get; set; } = new List<absence>(); 
} 

由於搜索它會很容易。比方說，你需要的人在特定的日期缺席：

IEnumerable<person> Persons = GetPersonsList(); 
DateTime dateToCheck = GetAbsentDate(); 

var absentPersons = Persons.Where(x=>x.absences.Any(a=>a.startingDate>= dateToCheck&&a.endingDate<= dateToCheck)); 

Answer 2

首先，在對問題的評論中提及user3185569，你必須使用這個指令更改代碼：Capitalization Conventions

其次，你必須考慮數據表示。人與缺席之間的關係是什麼樣的？一個人可能有幾次缺席（1：N關係）。所以，你必須存儲關於缺勤的數據和與此缺席有關的人。

類：

public class Person 
{ 
    public int PersonCode { get; set; } 
    public string Surname { get; set; } 
    public string Name { get; set; } 
    public string Address { get; set; } 

    //constructor, etc. 

    public override string ToString() 
    { 
     return string.Format("{0} {1} {2} {3}", PersonCode, Surname, Name, Address); 
    } 

} 

public class Absence 
{ 
    public int AbsenceCode { get; set; } 
    public int TypeAbsence { get; set; } 
    public DateTime StartingDate { get; set; } 
    public DateTime EndingDate { get; set; } 
    public string Description { get; set; } 
    public string State { get; set; } 
    //"a link" to person 
    public Person Person { get; set; } 

    //constructor, etc. 

    public override string ToString() 
    { 
     return string.Format("{0}\t|\t{1}\t{2}\t{3}", Person.ToString(), TypeAbsence.ToString(), 
      StartingDate.ToString("yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture), 
      EndingDate.ToString("yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture)); 

    } 
} 

用法：

List<Person> persons = new List<Person>() 
    { 
     new Person() {PersonCode = 1, Surname = "Los", Name = "Maciej", Address = "Poland, ..."}, 
     new Person() {PersonCode = 2, Surname = "Doe", Name = "John", Address = "USA, ..."}, 
     new Person() {PersonCode = 3, Surname = "McAlister", Name = "Fred", Address = "UK, ..."}, 
     new Person() {PersonCode = 4, Surname = "Sommer", Name = "Anna", Address = "Canada, ..."}, 
    }; 

List<Absence> absences = new List<Absence>() 
    { 
     new Absence(){AbsenceCode = 1, TypeAbsence=1, StartingDate = new DateTime(2017,5,11), EndingDate = new DateTime(2017,5,15), 
      Description = "whatever", State = "A", Person = persons[0]}, 
     new Absence(){AbsenceCode = 2, TypeAbsence=1, StartingDate = new DateTime(2017,5,18), EndingDate = new DateTime(2017,6,8), 
      Description = "whatever", State = "A", Person = persons[1]}, 
     new Absence(){AbsenceCode = 3, TypeAbsence=2, StartingDate = new DateTime(2017,6,1), EndingDate = new DateTime(2017,6,12), 
      Description = "whatever", State = "B", Person = persons[2]}, 
     new Absence(){AbsenceCode = 4, TypeAbsence=2, StartingDate = new DateTime(2017,6,1), EndingDate = new DateTime(2017,6,5), 
      Description = "whatever", State = "B", Person = persons[0]}, 
     new Absence(){AbsenceCode = 5, TypeAbsence=1, StartingDate = new DateTime(2017,6,2), EndingDate = new DateTime(2017,6,5), 
      Description = "whatever", State = "A", Person = persons[2]} 
    }; 

//define date-range to filter Absences data 
DateTime dfrom = new DateTime(2017,6,5); 
DateTime dTo = new DateTime(2017,6,9); 

var LastWeekAbsencesByPerson = absences 
    .Where(x=> (x.StartingDate<=dTo) && (x.EndingDate>=dfrom)) 
    .OrderBy(x => x.Person.Surname) 
    .ThenBy(x => x.StartingDate) 
    .ToList(); 

foreach(var lwabp in LastWeekAbsencesByPerson) 
{ 
    Console.WriteLine("{0}", lwabp.ToString()); 
    Console.WriteLine("{0}", new string('-', 60)); 
} 

在以相同的方式，可以按日期，人，缺席的類型等

過濾數據作爲對日期過濾器，我強烈建議閱讀此：Determine Whether Two Date Ranges Overlap

有很多t要做，改善，但這是你的工作。

祝你好運！