Basic of Inheritance for beginner

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Written By:-Isha Malhotra

Email:-malhotra.isha3388@gmail.com

Basic of Inheritance for beginners

Inheritance is property of oops by which we access one class into another class without writing the whole code. The class that is inherited is called base class and the class that does the inheritance is called a derived class.

Note:- two way of accessing class.1. create the object of class. 2. Inherit this class.

Syntax for inheritance

Access-modifier class derived-class: base class

{

}

For example

Create base class having one simple method

base_class

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

//create base class having one method for sum

public class base_class

{

    public int sum(int x, int y)

    {

        return x + y;

   

    }

}

Create derived class which inherited the base class

Derived_Class.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

//create derived class and inherit base class in it

public class Derived_Class: base_class

{

    public int mul(int x, int y)

    {

        return x * y;

   

    }

    //create another method in which call the base class method

    public int use_base_method(int x, int y)

    {

        //use base class method in derived class

        int result = sum(x, y);

        return result;

   

    }

}

Create the Design page and create the object of derived class

InheritanceExample.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class InheritanceExample : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        int fval = Convert.ToInt32(TextBox1.Text);

        int sval = Convert.ToInt32(TextBox2.Text);

        //create the object of derived class

        Derived_Class dc = new Derived_Class();

        //sum is method of base class but due to inheritance it can be accessed

        //through the object of derived class

        Label1.Text = Convert.ToString(dc.sum(fval, sval));

        //mul is method of derived class

        Label2.Text = Convert.ToString(dc.mul(fval,sval));

    }

}

Output

In this way we created one base class and define a method. Derived this class into another class(derived-class). Create the object of derived class and we can access the member variable and method of both derived and base class(should be public).