asp.net how to iterate over Session objects?

• • Reply

  11 years ago

  by pikej

  adam slodowy

  Warsaw, Poland

  Joined 11 years ago

  Hello guys,

  I have following questions. I am trying to write a simple e-commerce site and I use some code of my own. Basically it is a shopping cart. It uses Session to store some data, here comes some code:

  /** * The ShoppingCart class * * Holds the items that are in the cart and provides methods for their manipulation */ public class ShoppingCart { #region Properties

  public List<CartItem> Items { get; private set; }
  
  #endregion
  
  #region Singleton Implementation
  
  // Readonly properties can only be set in initialization or in a constructor
  public static readonly ShoppingCart Instance;
  // The static constructor is called as soon as the class is loaded into memory
  static ShoppingCart() {
      // If the cart is not in the session, create one and put it there
      // Otherwise, get it from the session
      if (HttpContext.Current.Session["ASPNETShoppingCart"] == null) {
          Instance = new ShoppingCart();
          Instance.Items = new List<CartItem>();
          HttpContext.Current.Session["ASPNETShoppingCart"] = Instance;
      } else {
          Instance = (ShoppingCart)HttpContext.Current.Session["ASPNETShoppingCart"];
      }
  }
  
  // A protected constructor ensures that an object can't be created from outside
  protected ShoppingCart() { }
  
  #endregion
  
  #region Item Modification Methods
  /**
   * AddItem() - Adds an item to the shopping
   */
  public void AddItem(int productId) {
      // Create a new item to add to the cart
      CartItem newItem = new CartItem(productId);
  
      // If this item already exists in our list of items, increase the quantity
      // Otherwise, add the new item to the list
      if (Items.Contains(newItem)) {
          foreach (CartItem item in Items) {
              if (item.Equals(newItem)) {
                  item.Quantity++;
                  return;
              }
          }
      } else {
          newItem.Quantity = 1;
          Items.Add(newItem);
      }
  }
  

  Now, I need to get some values from variables from this Session to send them to paypal. I can write some loop in Shoppinc cart to iterate over these objects:

  foreach (CartItem item in Items)

  The problem is that I need similar loop on a different page, Cart.aspx.cs, and foreach (CartItem item in Items) doesn't work any more.

  How can I access these variables from Cart.aspx.cs?

  Sorry for all this code. I would really appreciate some help.

  All the best,

  Pikej

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• • Reply

  11 years ago

  by moorthistays

  superman

  , India

  Joined 12 years ago

  in your cart.aspx.cs..

  Get from the HttpContext. There you have a session variable where you can retrieve from HttpContext.Current.Session["SessionName"] ! = null, just Get to List. I think this wil work.

  please send your question more clearly.

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