I'm trying to use one class type of the same namespace into a method interface

Question

2.33/5 (3 votes)

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C#

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

namespace GoingOutOfBusiness
{
    public class OnlineStore : IOnlineStore
    {
        List<producttype> stock = new List<producttype> {new ProductType("Lenovo", "Ps32", "2021", "This is a smart tablet 15 inch screen", 20, 14.8), new ProductType("ASUS", "ASUS-G4", "2021", "This is a gaming laptop", 4, 34.9), new ProductType("Samsung", "S21", "2021", "This is a smart phone", 5, 45.8) };
        

        public void AddProductsToInventory(ProductsPurchaseOrder purchaseOrder)
        {
            throw new NotImplementedException();
        }

        public InventoryItemSummary GetInventoryItemSummary(ProductType stockType)
        {
            InventoryItemSummary product = new InventoryItemSummary(product, model, year, description, count, price);
            stockType.product = "Check product description below";
            stockType.price = 13.56;

            foreach (var summary in stock)
            {
                Console.WriteLine(summary);
            }
            return null;
        }

        public InventorySummary GetInventorySummary()
        {
            InventorySummary InventoryItem = new InventorySummary();
            InventoryItem.Item = "This is all the items in the inventory";
            

            foreach (var item in stock)
            {
                Console.WriteLine(item);
            }
            return InventoryItem;

        }


        public ProductSoldResult SellProdcutsFromInventory(ProductsSellOrder itemsSoldOrder)
        {
            ProductSoldResult itemSoldOrder = new ProductSoldResult();
            itemsSoldOrder.soldProduct = "The item has been sold";

            foreach (var item in stock)
            {
                Console.WriteLine(item);
            }
            return stock;
        }
    }
}


////////////////////////////////////////////////////////////////////////////////////////
                                     the next class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GoingOutOfBusiness
{
    public class ProductType
    {
        public string product { get; set;}

        public string model { get; set;}

        public string year {get; set;}

        public string description { get; set; }

        public int count { get; set; }

        public double price { get; set; }

        public ProductType( string product, string model, string year, string description, int count, double price)
        {
            this.product = product;
            this.model = model;
            this.year = year;
            this.description = description;
            this.count = count;
            this.price = price;
        }

        public override string ToString()
        {
            return "Current brand in inventory: " + product + ", " + description + "\n";
        }

    }
}

////////////////////////////////////////////////////////////////////////////////////////
                                     the main method

using System;

namespace GoingOutOfBusiness
{
        public class Program
        {
        static void Main()
        {
            OnlineStore obj = new OnlineStore();
            var InventoryItem = obj.GetInventorySummary();
            Console.WriteLine(InventoryItem.Item);


            //obj.AddProductsToInventory();

            OnlineStore obj2 = new OnlineStore();
            var itemSummary = obj2.GetInventoryItemSummary();
            Console.WriteLine(itemSummary.stockType + " \nthis is the current price: " + itemSummary.price);



            OnlineStore obj3 = new OnlineStore();
            var SoldItem = obj.SellProdcutsFromInventory();
            Console.WriteLine(SoldItem.SoldItem + " Item sold.");


        }
       
    }

What I have tried:

I will add I'm new to C#, I have done a bit of Java before but never to this extent.

I am getting the cs7036, cs0029 errors specifically. This is the class library for the interface, I am trying to implement the stockType now and then purchaseOrder later on.

if you have an idea of what I need to do please assist otherwise, I can use google meet or discord if you wish to see the code upfront.

thank you

Posted 12-Oct-21 1:35am

awesome786

Updated 12-Oct-21 2:37am

OriginalGriff

v2

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OriginalGriff · Answer 1 · 2021-10-12T01:46:00

Solution 1

If you don't understand an error, google it:
cs7036 - Google Search[^]
cs0029 - Google Search[^]
And use the line numbers the error message includes to identify exactly where in yoru code the error occurs - I have no idea without trying to compile you app, and I don't have the full project (including forms and so forth) to do that under teh same conditions you do.

But one thing does sprint out at me:

InventoryItemSummary product = new InventoryItemSummary(product, model, year, description, count, price);

How do you expect that to work?
You are trying to create a variable called product and set it to a new instance of a class using the variable itself as part of the instance constructor call.
You can't do that: It's like saying "I want a new car and I'll use it as a trade in to buy it".

Posted 12-Oct-21 1:46am

OriginalGriff

Comments

awesome786 12-Oct-21 7:51am

well I did remove that snippet, do you want me to send you the entire code? and I have googled the errors but as I have said before its not something I easily understand on how to fix.

OriginalGriff 12-Oct-21 7:57am

No, these are syntax errors, and you really do need to learn how to fix them - because you are going to meet them every time you code, almost certainly! And it's a lot quicker to fix them yourself than to wait hours for someone else to do it for you ... we all get them, we all fix them!

Start in VS by double clicking on the error - it will go directly to the line that has the problem.
Look at it closely. Is it calling a method? If so, what parameters is it trying to pass? What parameters are defined by the method when you create it? Do they match?

If you can;t work it out, copy and paste the entire error, and show us which line it complains about, with a couple of lines above and below for context.

awesome786 12-Oct-21 8:02am

ok il try that and see how far I go but is it possible to have a code like this //
className methodName(className parameter)//

OriginalGriff 12-Oct-21 8:17am

I'm not quite sure what exactly you mean by that - it doesn't seem to make much sense.

What are to trying to achieve with that pseudocode?

Dave Kreskowiak 12-Oct-21 8:34am

Yes, you can, but in your case, why would you want to?

That line of code suggests a parent-child relationship, like you would find in a tree structure. Every branch of a tree can also contain other branches, but in all cases, every object is a "Branch".

This is not something you would find in a shopping site.

awesome786 12-Oct-21 8:42am

well you understand the concept but this is what they gave me as a requirement and im trying to figure how to implement those lines of code in order to pass the object they asking for from that class into that method. which I myself cannot understand why they want it done this way

Dave Kreskowiak 12-Oct-21 8:44am

Who is "they" and what is this assignment you're talking about?

awesome786 12-Oct-21 8:52am

im doing a short course in C#, this is part of the tasks for creating interfaces with a class library, so all my code is in a class called OnlineStore and my other classes are referenced to it. So I'm struggling with the section that requires me to give arguments to the method in the main method, I have given data types, values, variable names, objects are all telling me I can't implicitly convert one class to another

Dave Kreskowiak 12-Oct-21 8:54am

OK, given the context, your "className" is not the same class name used in both places. "className" is being used as a placeholder where YOU have to determine the class names to put there, but that does NOT mean both class names are the same.

It's a poorly worded question.

awesome786 12-Oct-21 9:02am

I do apologize, how would you go about determining the classes name or using it as a placeholder or what can you recommend I should specifically learn more about?

awesome786 · Answer 2 · 2021-10-12T02:37:00

C#

namespace GoingOutOfBusiness
{

public interface IOnlineStore
{

void AddProductsToInventory(ProductsPurchaseOrder purchaseOrder);
// add products to the inventory list

ProductSoldResult SellProdcutsFromInventory(ProductsSellOrder itemsSoldOrder);
// remove products from the inventory list

InventoryItemSummary GetInventoryItemSummary(ProductType stockType);
// className methodName (className parameter)
// show specifics about a product

InventorySummary GetInventorySummary();
// show all inventory
}
}

that is the interface code given to me, I want to know how I can implement the line starting with InventoryItemSummary, I have commented the type of code it is underneath.

I'm trying call the method GetInventoryItemSummary() with the class ProductType having a parameter of stockType, which stockType in the class ProductType is an object.

C#