Classes and Objects In C# With Example
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The document explains the creation of a 'car' class in code, detailing its properties such as model year, car name, car type, and price, along with methods to drive and apply brakes. It describes the process of creating car objects in memory, assigning values to their properties, and accessing those properties using the dot operator. Additionally, it discusses the possibility of creating multiple objects of the 'car' class and the implications of their individual memory allocations.
Classes and Objects In C# With Example
- 1. Car beetle = new Car(); Object Creation - Behind the scenes {CHEEZYCODE}
- 2. Car beetle = new Car(); class Car { //Properties public int modelYear; public string carName; public string carType; public float price; //Methods public void DriveCar() { Console.WriteLine("Car is driving"); } public void ApplyBrake() { Console.WriteLine("Car is applying brakes"); } } {CHEEZYCODE}
- 3. Car beetle = new Car(); 1 class Car { //Properties public int modelYear; public string carName; public string carType; public float price; //Methods public void DriveCar() { Console.WriteLine("Car is driving"); } public void ApplyBrake() { Console.WriteLine("Car is applying brakes"); } } {CHEEZYCODE}
- 4. Car beetle = new Car(); 1 When we say new Car(), new object in the memory is created. class Car { //Properties public int modelYear; public string carName; public string carType; public float price; //Methods public void DriveCar() { Console.WriteLine("Car is driving"); } public void ApplyBrake() { Console.WriteLine("Car is applying brakes"); } } {CHEEZYCODE}
- 5. Car beetle = new Car(); 1 When we say new Car(), new object in the memory is created. Memory Locations {CHEEZYCODE}
- 6. Car beetle = new Car(); 1 When we say new Car(), new object in the memory is created. Object will occupy certain bytes in memory Memory Locations {CHEEZYCODE}
- 7. Car beetle = new Car(); 1 When we say new Car(), new object in the memory is created. Memory Locations {CHEEZYCODE}
- 8. Car beetle = new Car(); 1 When we say new Car(), new object in the memory is created. Memory Locations {CHEEZYCODE}
- 9. Car beetle = new Car(); 1 When we say new Car(), new object in the memory is created. This is new object of Car in memory Memory Locations {CHEEZYCODE}
- 10. Car beetle = new Car(); 2 This is new object of Car in memory Memory Locations Object has been created, now location of this object is passed as a reference {CHEEZYCODE}
- 11. Car beetle = new Car(); 3 This is new object of Car in memory Memory Locations Location of this object is stored in beetle to access the car object {CHEEZYCODE}
- 12. Car beetle = new Car(); 4 beetle Memory Locations Now you can access newly created object in memory with the help of beetle reference {CHEEZYCODE}
- 13. Car beetle = new Car(); 5 beetle What does this object has? {CHEEZYCODE}
- 14. Car beetle = new Car(); 5 beetle What does this object has? class Car { //Properties public int modelYear; public string carName; public string carType; public float price; //Methods public void DriveCar() { Console.WriteLine("Car is driving"); } public void ApplyBrake() { Console.WriteLine("Car is applying brakes"); } } Remember this ? {CHEEZYCODE}
- 15. Car beetle = new Car(); 6 beetle Object stores properties values - it could be another object or built in types like int or float class Car { //Properties public int modelYear; public string carName; public string carType; public float price; //Methods public void DriveCar() { Console.WriteLine("Car is driving"); } public void ApplyBrake() { Console.WriteLine("Car is applying brakes"); } } {CHEEZYCODE}
- 16. 7beetle beetle object in memory has these properties class Car { //Properties public int modelYear; public string carName; public string carType; public float price; //Methods public void DriveCar() { Console.WriteLine("Car is driving"); } public void ApplyBrake() { Console.WriteLine("Car is applying brakes"); } } modelYear (Integer) carName (String) carType(String) price(float) {CHEEZYCODE}
- 17. 8 What if I want to create 2 objects? {CHEEZYCODE}
- 18. 8 What if I want to create 2 objects? Car beetle = new Car(); Car mustang = new Car(); {CHEEZYCODE}
- 19. 8 What if I want to create 2 objects? Car beetle = new Car(); Car mustang = new Car(); Same process will be followed {CHEEZYCODE}
- 20. 8 What if I want to create 2 objects? modelYear (Integer) carName (String) carType(String) price(float) modelYear (Integer) carName (String) carType(String) price(float) beetle mustang {CHEEZYCODE}
- 21. 8 beetle What if I want to create 2 objects? modelYear (Integer) carName (String) carType(String) price(float) modelYear (Integer) carName (String) carType(String) price(float) mustang BOTH OBJECTS ARE DIFFERENT {CHEEZYCODE}
- 22. 9 Assign values to these properties using dot(.) operator beetle modelYear (Integer) carName (String) carType(String) price(float) Assigning values to these properties. These are similar to variables but they are inside beetle and part of beetle object. {CHEEZYCODE}
- 23. 9 Assign values to these properties using dot(.) operator beetle modelYear (Integer) carName (String) carType(String) price(float) beetle.modelYear = 2017; beetle.carName = "Volkswagen Beetle“; beetle.carType = "Beetle 1.8T “; beetle.price = 19795F; {CHEEZYCODE}
- 24. 10 Access these properties using dot operator beetle modelYear (Integer) carName (String) carType(String) price(float) You access the properties of beetle using dot operator {CHEEZYCODE}
- 25. 10 Assign values to these properties using dot(.) operator beetle modelYear (Integer) carName (String) carType(String) price(float) Console.WriteLine(beetle.modelYear); and similarly you access other properties of object {CHEEZYCODE}
- 26. Classes And Objects This is how it works behind the scenes {CHEEZYCODE}