Add logic to property setter - CSharp Custom Type

CSharp examples for Custom Type:Property

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Description

Add logic to property setter

Demo Code



using System;/*from   www.j av a  2  s. c  om*/

public class Date
{
   private int month; // 1-12
   private int day; // 1-31 based on month
   public int Year { get; private set; } // auto-implemented property Year

   // constructor: use property Month to confirm proper value for month;
   // use property Day to confirm proper value for day
   public Date(int month, int day, int year)
   {
      Month = month; // validates month
      Year = year; // could validate year
      Day = day; // validates day
      Console.WriteLine($"Date object constructor for date {this}");
   }

   // property that gets and sets the month
   public int Month
   {
      get
      {
         return month;
      }
      private set // make writing inaccessible outside the class
      {
         if (value <= 0 || value > 12) // validate month
         {
            throw new ArgumentOutOfRangeException(
               nameof(value), value, $"{nameof(Month)} must be 1-12");
         }

         month = value;
      }
   }

   // property that gets and sets the day
   public int Day
   {
      get
      {
         return day;
      }
      private set // make writing inaccessible outside the class
      {
         int[] daysPerMonth =
            {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

         // check if day in range for month
         if (value <= 0 || value > daysPerMonth[Month])
         {
            throw new ArgumentOutOfRangeException(nameof(value), value,
               $"{nameof(Day)} out of range for current month/year");
         }
         // check for leap year
         if (Month == 2 && value == 29 &&
            !(Year % 400 == 0 || (Year % 4 == 0 && Year % 100 != 0)))
         {
            throw new ArgumentOutOfRangeException(nameof(value), value,
               $"{nameof(Day)} out of range for current month/year");
         }

         day = value;
      }
   }

   // return a string of the form month/day/year
   public override string ToString() => $"{Month}/{Day}/{Year}";
}



// Employee class with references to other objects.
public class Employee
{
   public string FirstName { get; }
   public string LastName { get; }
   public Date BirthDate { get; }
   public Date HireDate { get; }

   // constructor to initialize name, birth date and hire date
   public Employee(string firstName, string lastName,
      Date birthDate, Date hireDate)
   {
      FirstName = firstName;
      LastName = lastName;
      BirthDate = birthDate;
      HireDate = hireDate;
   }

   // convert Employee to string format
   public override string ToString() => $"{LastName}, {FirstName} " +
       $"Hired: {HireDate}  Birthday: {BirthDate}";
}


class EmployeeTest
{
   static void Main()
   {
      var birthday = new Date(7, 24, 1949);
      var hireDate = new Date(3, 12, 1988);
      var employee = new Employee("Bob", "V", birthday, hireDate);

      Console.WriteLine(employee);
   }
}

Result


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