私のC＃プログラムで誕生日のリマインダが表示されないのはなぜですか？

Question

私はこのコードを誕生日のリマインダーのために私のメインクラス（C＃）に書きました。それは今まで働いていましたが、今はありません。私はコードをまったく変更していません。何が問題なの？

/// <summary> 
/// Find all members that have birthdays occurring this week 
/// </summary> 
/// <returns>Returns an ArrayList containing members</returns> 
public ArrayList BirthdaysThisWeek() 
{ 
    ArrayList members = new ArrayList(); 

    DateTime today = DateTime.Today; 

    //Work out how many days to add or to take away to get us to Monday 
    int delta = DayOfWeek.Monday - today.DayOfWeek; 
    //Change the date to point to Monday 
    DateTime monday = today.AddDays(delta); 
    //Make this date point to Sunday 
    DateTime sunday = monday.AddDays(6); 

    foreach (Member member in allMembers) 
    { 
     DateTime dob = member.DateOfBirth.Date; 
     //Check to see if a member's birthdate is between Monday and Sunday 
     if(dob >= monday.Date && dob <= sunday.Date) 
     { 
      //Add member to members ArrayList 
      members.Add(member); 
     } 
    } 

    //Return all members that have a birthday this week if none were  found return an empty ArrayList 
    return members; 
} 

Answer 1

あなたの条件に動作しません週間。 （

int actuelYear = member.DateOfBirth.Month == monday.Month ? monday.Year : sunday.Year; 
DateTime dob = new DateTime(actuelYear, member.DateOfBirth.Month, member.DateOfBirth.Day); 
if (dob.Date >= monday.Date && dob.Date <= sunday.Date) 
{ 
    members.Add(member); 
} 

Answer 2

今週生まれない限り、私はこれがどのように機能するのか分かりません。

生まれた年を無視する必要があります。

public static bool IsBirthDayInRange(DateTime birthday, DateTime start, DateTime end) 
{ 
    DateTime temp = birthday.AddYears(start.Year - birthday.Year); 

    if (temp < start) temp = temp.AddYears(1); 

    return birthday <= end && temp >= start && temp <= end; 
} 

参考：https://stackoverflow.com/a/2554881/495455

ですから、このようにコードを変更する必要があります：あなたは、実際の日付を年、月、誕生日の日を比較するため

public ArrayList BirthdaysThisWeek() 
{ 
    ArrayList members = new ArrayList(); 

    DateTime today = DateTime.Today; 
    int delta = DayOfWeek.Monday - today.DayOfWeek; 
    DateTime monday = today.AddDays(delta); 
    DateTime sunday = monday.AddDays(6); 

    foreach (Member member in allMembers) 
    { 
     DateTime dob = member.DateOfBirth.Date; 

     //Check to see if a member's birthdate is between Monday and Sunday 
     if (IsBirthDayInRange(dob, monday, sunday) 
     { 
      //Add member to members ArrayList 
      members.Add(member); 
     } 
    } 
    return members; 
}