Can you help me in this token? if(this._Item==null){ this._Item = new List<Cart>(); this._dateCreate = DateTime.Now; } }.I do not understand it and why use

[Danh Le]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Shopping
{
public class Cart
{
private int _IDproduct;
private string _nameProduct;
private int _Quantity;
private string _ImageUrl;
private double _Price;
private double _Total;

   public Cart(){}
   public  Cart(int IDProduct, string NameProduct, int Quantity, string ImageURL, double Price){

       \_IDproduct = IDProduct;
       \_nameProduct = NameProduct;
       \_Quantity = Quantity;
       \_ImageUrl = ImageURL; ;
       \_Price = Price;
       \_Total = Price\*Quantity;
            }
   public int IDProduct {
       get { return \_IDproduct; }
       set { \_IDproduct = value; }
   }

   public string NameProduct
   {
       get { return \_nameProduct; }
       set { \_nameProduct = value; }
   }

   public int Quantity
   {
       get { return \_Quantity; }
       set { \_Quantity = value; }
   }

   public string ImageURL
   {
       get { return \_ImageUrl; }
       set { \_ImageUrl = value; }
   }

   public double Price
   {
       get { return \_Price; }
       set { \_Price = value; }
   }

   public double Total
   {
       get { return \_Price\*\_Quantity; }

   }
         }

    public  class CartItem{

        private DateTime \_dateCreate;
        private DateTime \_dateUpdate;
        private List<Cart> \_Item;
        public CartItem() {

         if(this.\_Item==null){

                 this.\_Item = new List<Cart>();
                 this.\_dateCreate = DateTime.Now;
         }
                    }

        public List<Cart> Item {
            get { return \_Item; }
            set { \_Item = value; }
        }

        public void Insert(int IDProduct, int Quantity, string ImageURL, string NameProuct, double Price) {


        }


    }

}

[Joshua Omundson]

I'm not sure what your question exactly is.

if(this._Item==null)

This statement checks to see if the list has anything in it. If it doesn't then it will create a new list so you can store Cart objects in it

[Lost User]

It is the constructor code for a CartItem object, although the if clause would seem redundant, as those two items would (presumably) always need to be set in the constructor. I'm not quite sure why a CartItem would hold a List of Cart objects, but no doubt there is a good reason.

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