inheritance in csharp

Hi Dnyaneshwar.

This is how you do it via abstract classes and methods

I have a parent class: Animal

I have two child classes: Dog and Cat

Each of the two option buttons dicates which child class will be used.

However I will be using the parent object varaible to call that child's code implementation

Choosing Child Class: Dog

Choosing Child Class: Cat

Code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Sandbox2
{
public partial class MyMainForm : Form
{
public MyMainForm()
{
InitializeComponent();
}
private void MyMainForm_Load(object sender, EventArgs e)
{
}
private void simpleButton1_Click(object sender, EventArgs e)
{
// Parent class
Animal a = null;
if(optDog.Checked==true)
{
// Parent class will implement Dog class stuff
a = new Dog("Canine", "Whippet");
}
if(optCat.Checked == true)
{
// Parent class will implement Cat class sutff
a = new Cat("Feline", "Tabi");
}
// using a parent class to execute child class implementation
txtAction.Text = a.DoAnAnimalActions();
}
}
public abstract class Animal
{
private string m_animalKind = string.Empty;
private string m_breed = string.Empty;
protected StringBuilder sb = null;
public Animal(string animalKind, string breed)
{
m_animalKind = animalKind;
m_breed = breed;
}
public string AnimalKind
{
get { return m_animalKind; }
}
public string Breed
{
get { return m_breed; }
}
// defines a template for implementation in child class
public abstract string DoAnAnimalActions();
}
public class Dog : Animal
{
public Dog(string animalKinda, string breed) : base (animalKinda, breed)
{
sb = new StringBuilder();
}
// child class implementation
public override string DoAnAnimalActions()
{
Bark();
Chase();
LookDumb();
return sb.ToString();
}
// Things Dogs Do
private void Bark() { sb.Append("Bark "); }
private void Chase() { sb.Append("Chase "); }
private void LookDumb() { sb.Append("Look Dumb"); }
}
public class Cat : Animal
{
public Cat(string animalKinda, string breed) : base(animalKinda, breed)
{
sb = new StringBuilder();
}
// child class implementation
public override string DoAnAnimalActions()
{
Meow();
Hide();
Stalk();
return sb.ToString();
}
// Things Cats Do
private void Meow() { sb.Append("Meow "); }
private void Hide() { sb.Append("Hide "); }
private void Stalk() { sb.Append("Stalk"); }
}
}

3 Replies

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Hemalatha Sunnapu8y ago
HI Dnyaneshwar ,
Did you get the answer ?
0
James Axsom8y ago
Hi Dnyaneshwar.
This is how you do it via abstract classes and methods

I have a parent class: Animal
I have two child classes: Dog and Cat
Each of the two option buttons dicates which child class will be used.
However I will be using the parent object varaible to call that child's code implementation

Choosing Child Class: Dog

Choosing Child Class: Cat

Code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Sandbox2
{
    public partial class MyMainForm : Form
    {
        public MyMainForm()
        {
            InitializeComponent();
        }

        private void MyMainForm_Load(object sender, EventArgs e)
        {

        }

        private void simpleButton1_Click(object sender, EventArgs e)
        {
            // Parent class
            Animal a = null;

            if(optDog.Checked==true)
            {
                // Parent class will implement Dog class stuff
                a = new Dog("Canine", "Whippet");
            }

            if(optCat.Checked == true)
            {
                // Parent class will implement Cat class sutff
                a = new Cat("Feline", "Tabi");
            }

            // using a parent class to execute child class implementation
            txtAction.Text = a.DoAnAnimalActions();
        }
    }

    public abstract class Animal
    {
        private string m_animalKind = string.Empty;
        private string m_breed = string.Empty;
        protected StringBuilder sb = null;

        public  Animal(string animalKind, string breed)
        {
            m_animalKind = animalKind;
            m_breed = breed;
        }

        public string AnimalKind
        {
            get { return m_animalKind; }
        }

        public string Breed
        {
            get { return m_breed; }
        }

        // defines a template for implementation in child class
        public abstract string DoAnAnimalActions();

    }


    public class Dog : Animal
    {
        public Dog(string animalKinda, string breed) : base (animalKinda, breed)
        {
            sb = new StringBuilder();
        }

        // child class implementation
        public override string DoAnAnimalActions()
        {
            Bark();
            Chase();
            LookDumb();

            return sb.ToString();
        }

        // Things Dogs Do
        private void Bark() { sb.Append("Bark  "); }
        private void Chase() { sb.Append("Chase  "); }
        private void LookDumb() { sb.Append("Look Dumb"); }
    }

    public class Cat : Animal
    {
        public Cat(string animalKinda, string breed) : base(animalKinda, breed)
        {
            sb = new StringBuilder();
        }

        // child class implementation
        public override string DoAnAnimalActions()
        {
            Meow();
            Hide();
            Stalk();

            return sb.ToString();
        }

        // Things Cats Do
        private void Meow() { sb.Append("Meow  "); }
        private void Hide() { sb.Append("Hide "); }
        private void Stalk() { sb.Append("Stalk"); }
    }
}
+2
Vova Kms8y ago
Project WinForms or WPF ?
+1