static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Console.WriteLine("Welcome to OO");
// Four pillars of OO:
// Inheritance.
var book = new Book();
var paper = new Paper();
book.Publish();
book.ReadBook();
paper.Publish();
// Encapsulation.
var test = new Test();
test.Description = "Something!";
Console.WriteLine(test.Description);
// Polymorphism.
Publication bookTwo = new Book();
//bookTwo.ReadBook(); // method from book
if (bookTwo is Book)
{
((Book)bookTwo).ReadBook();
}
bookTwo.Publish(); // method from publication
bookTwo.ToString(); // method from object
IList <Publication> publications = new List <Publication>();
publications.Add(new Book());
publications.Add(new Book());
publications.Add(new Paper());
publications.Add(new Paper());
publications.Add(new Comic());
publications.Add(new Comic());
foreach (var currentPublication in publications)
{
currentPublication.CleanPublication();
if (currentPublication is Comic)
{
((Comic)currentPublication).PutInZiplock();
}
}
// Abstraction.
IDataConnection connection;
bool isTest = true;
if (isTest)
{
connection = new DummyFileConnection();
}
else
{
connection = new DatabaseConnection();
}
// code code code
connection.GetData();
// code code code
connection.PushData();
//var publication = new Publication(); not possible cause abstract.
// Other topics.
// DateTime.
var date = DateTime.Now;
Console.WriteLine(date);
// Stringbuilder / String.Format
string wat = "fdsgdfg";
wat = "sddsfdaaf";
wat = wat + "1df";
var builder = new StringBuilder("Hello World!", 25);
builder.Append("wat");
var niceString = string.Format("There is a {0} at {1}", "Dog", "The Farm");
Console.WriteLine(niceString);
// Structs
var coords = new Coordinate(10, 20);
Console.WriteLine(coords);
// User input.
//Console.Write("Select Country (USA or BEL): ");
//string country = Console.ReadLine();
// Dictionary.
var dictionary = new Dictionary <int, string>();
dictionary.Add(1, "One");
dictionary.Add(5, "Five");
foreach (var kvp in dictionary)
{
Console.WriteLine(string.Format("For key: {0} there is the value: {1}", kvp.Key, kvp.Value));
}
string country = "USA"; // user input
var countries = new Dictionary <string, string>();
countries.Add("USA", "Star Spangled Banner");
countries.Add("BEL", "Yellow-Red-Black");
Console.WriteLine(countries[country]);
// Exceptions
var kennel = new Kennel();
var success = kennel.WalkBy();
if (!success)
{
Console.WriteLine("Could not walk by the kennel!");
}
var dog = new Dog();
try
{
dog.DoRoll();
}
catch (IndexOutOfRangeException ex)
{
}
catch (Exception e)
{
Console.WriteLine("Roll Exception!");
}
// var connection = new DBConnection();
try
{
dog.ChewOnBone();
dog.ChewOnBone();
// connection.Connect();
// var result = connection.Execute("SELECT * FROM");
}
catch (NoBonesException ex)
{
Console.WriteLine("The dog is out of bones...");
}
finally
{
// connection.Close();
Console.WriteLine("This happens regardless of exc or not");
}
// Events
var counter = new Counter();
counter.GoalReached += CounterGoalReached;
counter.GoalReached += CounterGoalReachedAgain;
for (int i = 0; i < 20; i++)
{
Console.WriteLine("Adding one to the counter");
counter.Add(1);
}
// Types of .Net Core Projects.
// .NET Core Console
// ASP.NET Core
// MVC (actually uses razor for the frontend) <-- Focus
// Razorpages (razor html - class)
// Blazor
// ASP.NET API
// ASP.NET API - Angular Frontend / React Frontend
// Xamarin (Mobile)
// Windows Clients Apps (Windows Forms, WPF, UWP, GTK)
// IoT / Machine Learning (GPIO, ML.NET)
}