C# kódokCsharp kódok gyüjteménye

using System;
using System.Collections.Generic;
using System.Text;
 
namespace CustomEnumerator
{
  public class Radio
  {
    public void TurnOn(bool on)
    {
      if(on)
        Console.WriteLine("Jamming...");
      else
        Console.WriteLine("Quiet time...");
    }
  }
}

using System;
using System.Collections.Generic;
using System.Text;
 
// Need this for IEnumerator
using System.Collections;
 
namespace CustomEnumerator
{
  // Garage contains a set of Car objects.
  public class Garage : IEnumerable
  {
    private Car[] carArray= new Car[4];
 
    // Fill with some Car objects upon startup.
    public Garage()
    {
      carArray[0] = new Car("Rusty", 30);
      carArray[1] = new Car("Clunker", 55);
      carArray[2] = new Car("Zippy", 30);
      carArray[3] = new Car("Fred", 30);
    }
 
    #region IEnumerable Members
 
    public IEnumerator GetEnumerator()
    {
      return carArray.GetEnumerator();
    }
 
    #endregion
  }
}

using System;
using System.Collections.Generic;
using System.Text;
 
namespace CustomEnumerator
{
  public class Car
  {
    #region Member variables & Constructors
    // Constant for maximum speed.
    public const int MaxSpeed = 100;
 
    // Internal state data.
    private int currSpeed;
    private string petName;
 
    // Is the car still operational?
    private bool carIsDead;
 
    // A car has-a radio.
    private Radio theMusicBox = new Radio();
 
    // Constructors.
    public Car() {}
    public Car(string name, int currSp)
    {
      currSpeed = currSp;
      petName = name;
    }
    #endregion
 
    #region Properties
    public int Speed
    {
      get { return currSpeed; }
      set { currSpeed = value; }
    }
    public string PetName
    {
      get { return petName; }
      set { petName = value; }
    }	
    #endregion
 
    #region Methods
    public void CrankTunes(bool state)
    {
      // Delegate request to inner object.
      theMusicBox.TurnOn(state);
    }
 
    // This time, throw an exception if the user speeds up beyond MaxSpeed.
    public void Accelerate(int delta)
    {
      if (carIsDead)
        Console.WriteLine("{0} is out of order...", petName);
      else
      {
        currSpeed += delta;
        if (currSpeed >= MaxSpeed)
        {
          carIsDead = true;
          currSpeed = 0;
 
          // We need to call the HelpLink property, thus we need
          // to create a local variable before throwing the Exception object.
          Exception ex =
            new Exception(string.Format("{0} has overheated!", petName));
          ex.HelpLink = "http://www.CarsRUs.com";
 
          // Stuff in custom data regarding the error.
          ex.Data.Add("TimeStamp",
            string.Format("The car exploded at {0}", DateTime.Now));
          ex.Data.Add("Cause", "You have a lead foot.");
          throw ex;
        }
        else
          Console.WriteLine("=> CurrSpeed = {0}", currSpeed);
      }
    }
    #endregion
  }
}

using System;
using System.Collections.Generic;
using System.Text;
 
using System.Collections;
 
namespace CustomEnumerator
{
  // This seems reasonable...
  public class Program
  {
    static void Main(string[] args)
    {
      Console.WriteLine("***** Fun with IEnumerable / IEnumerator *****\n");
 
      Garage carLot = new Garage();
 
      // Hand over each car in the collection?
      foreach (Car c in carLot)
      {
        Console.WriteLine("{0} is going {1} MPH",
          c.PetName, c.Speed);
      }
 
      Console.WriteLine();
 
      // Manually work with IEnumerator.
      IEnumerator i = carLot.GetEnumerator();
      i.MoveNext();
      Car myCar = (Car)i.Current;
      Console.WriteLine("{0} is going {1} MPH", myCar.PetName, myCar.Speed);
      Console.ReadLine();
    }
  }
}