Implement a Custom Indexer - CSharp Custom Type

CSharp examples for Custom Type:Indexer

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Description

Implement a Custom Indexer

Demo Code

using System;/*from w w w  . j  a  v  a  2 s .c o m*/
using System.Collections.Generic;
using System.Linq;
public class Employee
{
   public int DayOfWeek
   {
      get;
      set;
   }
   public int DailyTemp
   {
      get;
      set;
   }
   public int WorkingHours
   {
      get;
      set;
   }
}
public class EmployeeManager
{
   private int[] temps = { 4, 3, 6, 5, 6, 7, 8 };
   IList<string> daysOfWeek = new List<string>(){"Monday", "Tuesday", "Wednesday","Thursday", "Friday", "Saturday", "Sunday"};
   public Employee this[string dow]
   {
      get
      {
         // get the day of the week index
         int dayindex = daysOfWeek.IndexOf(dow);
         return new Employee()
         {
            DayOfWeek = dayindex,
            DailyTemp = temps[dayindex],
            WorkingHours = calculateTempSoFar(dayindex)
         };
      }
      set
      {
         temps[daysOfWeek.IndexOf(dow)] = value.DailyTemp;
      }
   }
   private int calculateTempSoFar(int dayofweek)
   {
      int[] subset = new int[dayofweek + 1];
      Array.Copy(temps, 0, subset, 0, dayofweek + 1);
      return (int)subset.Average();
   }
}
public class MainClass
{
   static void Main(string[] args)
   {
      EmployeeManager forecast = new EmployeeManager();
      string[] days = {"Monday", "Thursday", "Tuesday", "Saturday"};
      foreach (string day in days)
      {
         Employee report = forecast[day];
         Console.WriteLine("Day: {0} DayIndex {1}, Temp: {2} Ave {3}", day,report.DayOfWeek, report.DailyTemp, report.WorkingHours);
      }
      forecast["Tuesday"] = new Employee()
      {
         DailyTemp = 34
      };
      foreach (string day in days)
      {
         Employee report = forecast[day];
         Console.WriteLine("Day: {0} DayIndex {1}, Temp: {2} Ave {3}", day,report.DayOfWeek, report.DailyTemp, report.WorkingHours);
      }
   }
}

Result


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