OOP in C#

Maha EL-basuonyOOP

Agenda

Array

Functions

OOP

Type [ ] Array_Name = new int [arraySize] ;

Array

int[] myIntArray = {5, 9, 10, 2, 99} ;

int[] myIntArray = new int[5] ;

int[] myIntArray = new int[5] {5, 9, 10, 2, 99} ;

Examples

One Dimensional Array

a data structure that contains several variables of the same type .

Multidimensional Arrays

- A two - dimensional array such as this is declared as follows :

< baseType > [ , ] < name >

double[ , ] hillHeight = new double[3,4] ;

int[ , ] hillHeight = {{1, 2, 3, 4}, {2, 3, 4, 5}, {3, 4, 5, 6}} ;

Examples

Arrays of Arrays

int[][] MyArray ;MyArray = {{1, 2, 3}, {1}, {1, 2}} ;

int[][] MyArray = {new int[] {1, 2, 3}, new int[] {1}, new int[]{1,2}} ;

MyArray = new int[2];][MyArray[0] = new int[3];MyArray[1] = new int[4] ;

MyArray= new int[3][] {new int[] {1, 2, 3}, new int[] {1},new int[] {1, 2}} ;

String Manipulation

String Builder

Array List

Queue

Functions

static Void < functionName) ( > { ... }

static < returnType > < functionName ) ( > {...

return < returnValue > }

Value Parameters

Reference Parameters

Out Parameters

Main Function

static void Main) (

static void Main(string[] args)

static int Main)(

static String Main(string[] args)

Struct Function

Overloading Functions

create multiple functions with the same name, but each working with different parameter types

Generic

Delegates

A delegate is a type that enables you to store references to functions.

try {

// the code that might has exception }

catch {

// exception handling block }

finally{

// this block is executed either there is exceptions or not

}

try . . . catch . . . finally

Classes & Objects

Constructors

This

Access Modifier

-Public Members are accessible from any code.

-Private Members are accessible only from code that is part of the class (the default if no keyword is used) .

-Protected Members are accessible only from code that is part of either the class or a derived class.

-Internal Members are accessible only from code within the project (assembly) where they are defined .

-Protected Internal These are only accessible from code - derived classes within the project (more accurately, the assembly).

Class Definition

Encapsulation

Inheritance is -a

has -a

tire is a car

car has a tire

has -a

Interface

-like a class, but has no implementation.

-Can be Internal or Public

Polymorphism

Future Sessions

System.IO

System.Linq

System.Threading

Q & AThanks