How can I convert from "System.Collections.GenericList<Artikel>" to "Artikel&qu-CodePudding

   public List<Racun> IzdaniRacun { get; }
    public List<Artikel> ZalogaArtiklov { get; }
    public List<RezerviranArtikel> ZalogaRezerviraniArtiklov { get; }

    public Lekarna(List<Racun> izdaniRacuniList, List<Artikel> zalogaArtiklov, List<RezerviranArtikel> zalogaRezerviraniArtiklovList)
    {
        IzdaniRacun = izdaniRacuniList;
        ZalogaArtiklov = zalogaArtiklov;
        ZalogaRezerviraniArtiklov = zalogaRezerviraniArtiklovList;
    }

    //void rezervirajArtikel(Artikel artikel, Oseba oseba), ki artikel premakne iz zaloge in ga uvrsti na seznam rezerviranih artiklov
    public void rezervirajArtikel(Artikel artikel, Oseba oseba)
    {
        List<Artikel> selected = ZalogaArtiklov.Where(a => a.Id == artikel.Id).ToList();
        selected.ForEach(item => ZalogaArtiklov.Remove(item));

        ZalogaRezerviraniArtiklov.AddRange(new RezerviranArtikel(selected, oseba));

        foreach (Artikel a in ZalogaArtiklov)
        {
            Console.WriteLine(a);
        }

        foreach (RezerviranArtikel a in ZalogaRezerviraniArtiklov)
        {
            Console.WriteLine(a);
        }
    }

RezerviranArtikel Class

using System;
using System.Collections.Generic;

public class RezerviranArtikel 
{
    // Pripravite razred RezerviranArtikel, ki vsebuje artikel in osebo za katero je artikel rezerviran.
    public Artikel Artikel { get; }
    public Oseba Oseba { get; }

    public RezerviranArtikel(Artikel artikel, Oseba oseba)
    {
        Artikel = Artikel;
        Oseba = oseba;
    }
}

I basically have to move the item from one list (Article) to another, (ReservedArticle) by removing item from one list and adding it to the oher one.

But I am having a problem with fixing this error becuase I can not conver from List to an object named "Artikel". Do you have any suggestions on how to fix that error?

Error: CS1503 Argument 1: cannot convert from 'System.Collections.Generic.List' to 'Artikel'

on this line of code:

ZalogaRezerviraniArtiklov.AddRange(new RezerviranArtikel(selected, oseba));

CodePudding user response：

You want to use :

ZalogaRezerviraniArtiklov.AddRange(selected.Select(article => new RezerviranArtikel(article, oseba));

because you want to convert each Artikel in selected list to RezerviranArtikel, not just one element.

CodePudding user response：

As you are using .AddRange method then it looks like you want to add a collection of RezerviranArtikel. So your code will look like this:

ZalogaRezerviraniArtiklov.AddRange(selected.Select(selectedArticle => new 
    RezerviranArtikel(selectedArticle, oseba));