Behind the Scenes Look at C#: Indexers - C# Indexers Example (First Iteration)

(Page 2 of 4 )

Please copy the following code and compile it:

using System;
using System.Text;

namespace indexers
{
  class Class1
  {
    static void Main(string[] args)
    {
      Department dept = new Department();
      dept.Name = "IT";

      // creating the first Employee object
      Employee emp1 = new Employee();  
      emp1.FirstName = "Maria"; 
      emp1.LastName = "Jack";

      // creating the other employee objects
      Employee emp2 = new Employee();
      emp2.FirstName = "Mina";
      emp2.LastName = "Jack";

      Employee emp3 = new Employee();
      emp3.FirstName = "Mick";
      emp3.LastName = "Nelson";

      Employee emp4 = new Employee();
      emp4.FirstName = "John";
      emp4.LastName = "smith"; 

      Employee emp5 = new Employee();  
      emp5.FirstName = "Joly"; 
      emp5.LastName = "Mac";

      Employee emp6 = new Employee();  
      emp6.FirstName = "Steven";
      emp6.LastName = "Joe";

      // using the indexer
      dept[0] = emp1;
      dept[1] = emp2;
      dept[2] = emp3;
      dept[3] = emp4;
      dept[4] = emp5;
      dept[5] = emp6;

      Console.WriteLine(dept.ToString());
      Console.ReadLine(); 
    }
  }

  class Department
  {
    private string name;
    private Employee[] Employees = new Employee[6]; 
 
    public Employee this[int arg]
    { 
      get
      {
        return this.Employees[arg];
      }

      set
      {
        this.Employees[arg] = value;
      }
    }

    public string Name
    {
      get
      {
        return this.name;
      }

      set
      {
        this.name = value;
      }
    }

    public override string ToString()
    {
      StringBuilder temp = new StringBuilder();
      temp.Append("The department "+this.name+" contains"+
" the following Employees\n");

      foreach(Employee emp in Employees)
      {
        temp.Append("\n" + emp.ToString()); 
      } 
      return temp.ToString(); 
    } 

  }

  class Employee
  {
    private string firstName;
    private string lastName;

    public string FirstName
    {   
      get
      {
        return this.firstName;
      }

      set
      {
        this.firstName = value;
      }
    }

    public string LastName
    {
      get
      {
        return this.lastName;
      }

      set
      { 
        this.lastName = value;
      } 
    }

    public override string ToString()
    {
      return this.firstName+" "+this.lastName;
    }

  }
}

Run the application to get the following result to the console window:

Next: Explanation of code >>
 

More C# Articles
More By Michael Youssef

Comments On: Behind the Scenes Look at C#: Indexers

>>> Be the FIRST to comment on this article!