C#•9mo ago

Static property issues

I have a static public property of a class I'll call A, whose value in a class I'll call B is 0, when in reality its value is something else. The value of the class in the Main() method is just as it should be, which is very perplexing.

42 Replies

leowest•9mo ago

$paste

MODiX•9mo ago

If your code is too long, you can post to https://paste.mod.gg/ and copy the link into chat for others to see your shared code!

Angius•9mo ago

Do you change this value at any point?

Spaghetti_cult_ownerOP•9mo ago

yes It's set as 0 at startup and it gets changed later on Going to send the code real quick

Spaghetti_cult_ownerOP•9mo ago

https://paste.mod.gg/cwvpksiwvdrp/0

BlazeBin - cwvpksiwvdrp

A tool for sharing your source code with the world!

leowest•9mo ago

that's a mess you really shouldn't use it like that looking at the code the most logical way here would be for u to remove the Count from Vehicle and do a proper collection of the cars you're creating it seems you're making things static for the solo purpose of printing it to the console because its a static method but that is not how u should do it is this a school project where u are limited on things u can use meaning what u learned or a personal project if its a school project it would help if u provide what your teacher asked

Spaghetti_cult_ownerOP•9mo ago

No I'm learning c# on my own So I guess I'll have to research collections Other than all that, is there a reason that a parameter has two different values when it's static and thus can't have instances?

leowest•9mo ago

well in your example because its a bad design you could technically keep a static field to keep a counter that survive thru instances but that can be a very specific scenario but an actual useful scenario u would have a public static property would be a singleton these are just examples.

Spaghetti_cult_ownerOP•9mo ago

Adding singletons to the checklist

leowest•9mo ago

I wouldn't add it to the list right now add it to the list when u actually find a use for it right now I would worry about variable and scopes and classes and OOP

Spaghetti_cult_ownerOP•9mo ago

I have went through that, and overriding / overloading, abstraction, encapsulation

leowest•9mo ago

that's good

leowest•9mo ago

https://learn.microsoft.com/en-us/shows/csharp-fundamentals-for-absolute-beginners/

C# Fundamentals for Absolute Beginners

Learn C# programming from an expert in the industry. Get the tools, see how to write code, debug features, explore customizations, and more. For newer videos head over to dot.net/videos

leowest•9mo ago

this is what I like suggesting people to these are a series of small videos that take care of explaining things in small parts

Spaghetti_cult_ownerOP•9mo ago

But I still can't understand why a public variable is acting like there is a local overriding it Thanks

leowest•9mo ago

which one was that

Spaghetti_cult_ownerOP•9mo ago

The Count property of class Vehicle It displays property on main() But when I try checking it in the UI class it displays as 0

leowest•9mo ago

because you initialize it as 0

Spaghetti_cult_ownerOP•9mo ago

Indeed I do, but the value changes, right? In the vehicle constructor

leowest•9mo ago

ah forgot the constructor

MODiX•9mo ago

leowest

REPL Result: Success

var car = new Car();
Car.Count = 20;
Console.WriteLine(Car.Count);
car = new Car();
Console.WriteLine(Car.Count);

public class Car
{
    public static int Count { get; set; } = 0;
    public Car()
    {
        Count++;
    }
}

var car = new Car();
Car.Count = 20;
Console.WriteLine(Car.Count);
car = new Car();
Console.WriteLine(Car.Count);

public class Car
{
    public static int Count { get; set; } = 0;
    public Car()
    {
        Count++;
    }
}

Console Output

20
21

20
21

Compile: 442.983ms | Execution: 42.859ms | React with ❌ to remove this embed.

Spaghetti_cult_ownerOP•9mo ago

Interesting Yeah, if I'm correct in the lines above the class car are for main(), it works The moment you try to access count from another class it gives you 0

leowest•9mo ago

I mean that code u had would not compile in first place and beyond that, how would u access the instance of each car to print their information

Spaghetti_cult_ownerOP•9mo ago

Oh, it does compile

leowest•9mo ago

then u changed it because the one u posted above in here have issues

Spaghetti_cult_ownerOP•9mo ago

I removed some parts that were comments and may have snipped something

leowest•9mo ago

figured but yeah it does print the right number because its public static its like a global variable, they have specific use cases but that was not one of it

Spaghetti_cult_ownerOP•9mo ago

<Car name>.ToString()

leowest•9mo ago

try it u were doing that from inside teh Ui or are u going to make your entire code now static just so u can print things 😛 u see what I mean

Spaghetti_cult_ownerOP•9mo ago

leowest•9mo ago

yeah if u print it on the main method

Spaghetti_cult_ownerOP•9mo ago

leowest•9mo ago

but you wanted to print it from a method inside the UI that have no knowledge of what car is

Spaghetti_cult_ownerOP•9mo ago

Oh yeah, I have thought about that

leowest•9mo ago

The method u wanted to print from that exists in a different Class that have absolute no knowledge of what the instance of car is

        //public static int rows = 10;
        static string VehicleRows(int rows)
        {
            int test1 = Vehicle.Count;
            /* for (int i = 0; i <= Vehicle.Count; i++)
             {
                 return "|                                                                                                   o| Speed: 000km/h, Distance driven: 100km |";
             }
             return null;*/
            //Console.WriteLine(rows);
            Console.WriteLine(string.Join("", Enumerable.Repeat("Test text.", 5)));                                                                 //Need backup
        }

        //public static int rows = 10;
        static string VehicleRows(int rows)
        {
            int test1 = Vehicle.Count;
            /* for (int i = 0; i <= Vehicle.Count; i++)
             {
                 return "|                                                                                                   o| Speed: 000km/h, Distance driven: 100km |";
             }
             return null;*/
            //Console.WriteLine(rows);
            Console.WriteLine(string.Join("", Enumerable.Repeat("Test text.", 5)));                                                                 //Need backup
        }

Spaghetti_cult_ownerOP•9mo ago

and that goes into the topic of automatically named cars which I'll have to figure ou how to do

leowest•9mo ago

well check the videos I sent u above it has a chapter on working with collections and one about variables and scopes those are super important

Spaghetti_cult_ownerOP•9mo ago

yeah, my resources didn't have collections will have to check it out I guess lists too

leowest•9mo ago

list is part of collections

Spaghetti_cult_ownerOP•9mo ago

oh, convenient

leowest•9mo ago

yep, give those videos a go and if u have questions we are here if u want watch all of it the guy explains things very well

Spaghetti_cult_ownerOP•9mo ago

Thanks a lot

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Static property issues