CRUD (Create, Update, Delete) MVC with React

 Use C# .NET Core Framework, data annotations to the models

 Object-Oriented Programming Concepts

• Encapsulation

• Abstraction

• Inheritance

• Polymorphism

Encapsulation

Binding multiple data and functions together in a packet. In coding  you find a Class that keep related data and functions as a bundle.  

Abstraction

Hiding the logic of functions from user (hiding implementation part). 

In coding :

Console.WriteLine();    you cant see definition of WriteLine 

Inheritance

If Class B inherited from Class A, Class B able to access functions in Class A .

But depend on access modifiers been assigned with functions.

if functions are public or protected in Main class, inherited class can access.

access to Protected function from only first level inherited class

Noted : One class get inherited from Many classes

Polymorphism

"Poly" means Many   "morphism" means Forms

If classes inherited from one to many in a hierarchy,There are parent class and its descendants. Meanwhile, the same operation name among objects in an inheritance hierarchy may behave differently.

In terms of Functionality, Polymorphism derives to Static and Dynamic.

Static (Design-Time)

This is Function Overloading. When we create two or more functions with same name but with different Signatures.

there are two types:   

a. Different number of parameters,

Public double  Area (double r)                                        Public double Area (double i, double j)

{                                                                                         {

double result =3.14*r*r;                                                           double result =i*j;

}                                                                                         }

b. Same number of parameters but different Data Types,

Dynamic (Run-Time)

This is Function Overriding. Bass Class pointer can point to any of its derived class.

Base class EMP                                                         Derived Class Manager

public double virtual Bonus()                                    public double override Bonus()

{                                                                                 {

double PayRate = 0.01                                                double PayRate = 0.02

return PayRate;                                                            return PayRate;

}                                                                                  }

EMP obj;  // Create object

obj=new EMP();    //object pointing to Bass class

or

obj = new Manager();  // object pointing to Derived class

obj.Bonus();     //calling the function 

Note: But remember to use "Virtual "and "Override "terms