i need to iterate through list i created, but can’t access objects inside, i tried a few different functions but nothing worked and i’m afraid i’m using wrong tools for the job:)
namespace WholesaleApp
{
internal class Program : Wholesale
{
static string filePath = "C:\\Wholesale.txt";
static void Main(string[] args)
{
List<Merchandise> productList = new List<Merchandise>();
productList = ReadFromFile(filePath);
foreach(Merchandise merchandise in productList)
{
//this is where i'm trying to access objects inside and display them
}
}
}
}
This is my abstract class:
namespace WholesaleApp
{
internal abstract class Merchandise
{
public string merchandiseName { get; set; }
public int merchandiseAmount { get; set; }
public Merchandise(string name, int amount)
{
merchandiseName = name;
merchandiseAmount = amount;
}
}
}
And this is one of the three class deriving from Merchandise abstract class
namespace WholesaleApp
{
internal class MerchandiseClothing : Merchandise
{
public string clothSize { get; set; }
public string clothType { get; set; }
public MerchandiseClothing(string _clothType, string _clothSize, string name, int amount) : base(name, amount)
{
clothType = _clothType;
clothSize = _clothSize;
}
public void ReturnAll()
{
Console.Write(merchandiseName+" of type: "+clothSize+" in amount: "+merchandiseAmount+ " and jeep status is: "+clothType);
}
}
}
Finally, my function where i add everything to the final list, sorry for the long block but i think it may be important!
namespace WholesaleApp
{
internal class Wholesale
{
static public List<Merchandise> ReadFromFile(string filePath)
{
List<Merchandise> result = new List<Merchandise>();
string line;
StreamReader reader = null!;
try
{
reader = new StreamReader(filePath);
line = reader.ReadLine()!;
while (line != null)
{
string[] words = line.Split(';');
if (words[0] == "MerchandiseComputer")
{
result.Add(new MerchandiseComputer(words[1], words[2], Int32.Parse(words[3])));
}
else if (words[0] == "MerchandiseCarParts")
{
result.Add(new MerchandiseCarParts(bool.Parse(words[1]), words[3], words[2], Int32.Parse(words[4])));
}
else if (words[0] == "MerchandiseClothing")
{
result.Add(new MerchandiseClothing(words[1], words[2], words[3], Int32.Parse(words[4])));
}
line = reader.ReadLine()!;
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
finally
{
reader.Close();
}
return result;
}
}
}
Sorry if my formating is off – that is my first question here and i really tried to make it readable! If something is wrong, please let me know:)
>Solution :
It should be possible to iterate here iterate through objects already. If you want to use specific fields from each specific class, you can put here a check on type and do whatever you want. For example:
foreach (Merchandise merchandise in productList)
{
if (merchandise is MerchandiseClothing clothing)
{
Console.WriteLine(clothing.clothSize); //Can be use any field from Clothing class
Console.WriteLine(clothing.merchandiseAmount); //And also from parent
}
else if (merchandise is MerchandiseComputer computer)
{
//Do what you want
}
}
However, better to make abstract method like WriteToConsole in Merchandise class and override it in each implementation. Like ReturnAll method in your MerchandiseClothing class