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CC#

•Created by Steadhaven on 5/13/2024 in #help

Translating basic UML diagram into code?

4 replies

CC#

•Created by Steadhaven on 3/4/2024 in #help

No Main and class confusion in newer C# versions

I am confused about the newer C# versions... When I make a console app, it just starts like so:

// See https://aka.ms/new-console-template for more information
Console.WriteLine("Hello, World!");

// See https://aka.ms/new-console-template for more information
Console.WriteLine("Hello, World!");

As you see, theres no class or Main method. In Java, and old C# if I am correct, we always have to have a class with a main method for our code to run. However, it seems that newer C# versions doesn't require this. Yet my confusion is: - OOP is rather valuable in a lot of scenarios, so what do we do without classes? - Is the Main method just in the first file we create? or where is it? it seems to run without it

52 replies

CC#

•Created by Steadhaven on 3/4/2024 in #help

Which of these two books would you recommend to dive deep into?

Hi, I know other languages like Java, Scala, and some web dev like React/Next.js/TypeScript. I am now in the pursuit of learning C#. I prefer to read books as its much easier and faster for me than a computer screen, also I can more readily take notes inside the book (yeah I know some hate it). I found these two modern and updated books: - Essential C# 12.0 by Mark Michaelis: https://www.amazon.com/Essential-12-0-Addison-Wesley-Microsoft-Technology/dp/0138219516 It doesn't have ratings yet because its so new, but the old one in its series got 4.7 rating score from 15 ratings: https://www.amazon.com/Essential-C-8-0-Mark-Michaelis-ebook/dp/B08Q84TH84 - C# 12 and .NET 8 – Modern Cross-Platform Development Fundamentals: Start building websites and services with ASP.NET Core 8, Blazor, and EF Core 8 by Mark J. Price: https://www.amazon.com/12-NET-Cross-Platform-Development-Fundamentals/dp/1837635870 As you see it also has 4.7 rating score from 51 ratings, but its been out 1 month more.

5 replies

CC#

•Created by Steadhaven on 2/28/2024 in #help

How to refactor lots of overloaded methods more smartly?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MethodOverload
{
    internal class Program
    {
        static void Main(string[] args)
        {
            var person1 = new PersonModel("Peter", "Wow","[email protected]");
            person1.GenerateEmail("gmail.com", true);
            Console.WriteLine(person1.Email);
            Console.ReadLine();
        } 
    }

    public class PersonModel
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Email { get; set; }
        public PersonModel()
        {
            //method overloading
            
        }
        public PersonModel(string firstName, string lastName, string email)
        {
            FirstName = firstName;
            LastName = lastName;
            Email = email;
        }

        public void GenerateEmail()
        {
            Email = $"{FirstName}.{LastName}@aol.com";
        }
        public void GenerateEmail(string domain)
        {
            Email = $"{FirstName}.{LastName}@{domain}";
        }

        public void GenerateEmail(bool firstInitialMethod)
        {
            if (firstInitialMethod == true)
            {
                Email = $"{FirstName.Substring(0,1)}{LastName}@aol.com";
            }
            else
            {
                Email = $"{FirstName}.{LastName}@aol.com";
            }
        }

        public void GenerateEmail(string domain, bool firstInitialMethod)
        {
            if (firstInitialMethod == true)
            {
                Email = $"{FirstName.Substring(0, 1)}{LastName}@{domain}";
            }
            else
            {
                Email = $"{FirstName}.{LastName}@{domain}";
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MethodOverload
{
    internal class Program
    {
        static void Main(string[] args)
        {
            var person1 = new PersonModel("Peter", "Wow","[email protected]");
            person1.GenerateEmail("gmail.com", true);
            Console.WriteLine(person1.Email);
            Console.ReadLine();
        } 
    }

    public class PersonModel
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Email { get; set; }
        public PersonModel()
        {
            //method overloading
            
        }
        public PersonModel(string firstName, string lastName, string email)
        {
            FirstName = firstName;
            LastName = lastName;
            Email = email;
        }

        public void GenerateEmail()
        {
            Email = $"{FirstName}.{LastName}@aol.com";
        }
        public void GenerateEmail(string domain)
        {
            Email = $"{FirstName}.{LastName}@{domain}";
        }

        public void GenerateEmail(bool firstInitialMethod)
        {
            if (firstInitialMethod == true)
            {
                Email = $"{FirstName.Substring(0,1)}{LastName}@aol.com";
            }
            else
            {
                Email = $"{FirstName}.{LastName}@aol.com";
            }
        }

        public void GenerateEmail(string domain, bool firstInitialMethod)
        {
            if (firstInitialMethod == true)
            {
                Email = $"{FirstName.Substring(0, 1)}{LastName}@{domain}";
            }
            else
            {
                Email = $"{FirstName}.{LastName}@{domain}";
            }
        }
    }
}

9 replies

CC#

•Created by Steadhaven on 2/18/2024 in #help

IDisposable and using keyword?

using (Wolf wolf = new Wolf()) {}

public interface ICarnivore {}

public class Wolf : ICarnivore, IDisposable {
   public void Dispose() {}
}

using (Wolf wolf = new Wolf()) {}

public interface ICarnivore {}

public class Wolf : ICarnivore, IDisposable {
   public void Dispose() {}
}

I am trying to understand using and IDisposable. It seems that we can attach IDisposable to any class, which gives us a method called Dispose that we have to implement. This dispose method is automatically run and does whatever is specified, whenever we shutdown/remove a class. And using is something we use for IDisposable classes only it seems. And somehow the using keyword would then know what to do when we shutdown the class... 1- I can kind of understand IDisposable, but want to know if my explanation is correct 2- What does it mean that a class is shutdown/removed? how can I do this in code? 3- the using keyword (as I tried to explain above) still make almost no sense, and I am even sensing it can be used without IDisposable (If needed for other language examples then I know Java/Scala/React a bit, but prefer C# explanation :) )

6 replies

CC#

•Created by Steadhaven on 1/30/2024 in #help

Do while with int.TryParse - how?

I am trying to create a C-sharp program, that ask the user to pick a number between 1 and 3. It will then use that number to print one of three names I have in an array. This is how far I got:

string[] names = new string[] { "Peter", "John", "Paul" };

Console.Write("Select a number from 1-3: ");
string numberText = Console.ReadLine();

bool isValidNum = false;
int.TryParse(numberText, out int num)

do () {
    
} while (isValidNum == false);

string[] names = new string[] { "Peter", "John", "Paul" };

Console.Write("Select a number from 1-3: ");
string numberText = Console.ReadLine();

bool isValidNum = false;
int.TryParse(numberText, out int num)

do () {
    
} while (isValidNum == false);

I wanted the do-while to continue until the nubmerText is an actual number I can parse to Int, but also then be a valid number from 1-3 but I am kind of confused as to how to proceed.

35 replies

CC#

•Created by Steadhaven on 1/30/2024 in #help

Copy lines shortcut not working in Visual Studio 2022

1 replies

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