protected void btnAddToCart_Click(object sender, EventArgs e)
{
//Todo: Add your code here
if (!Page.IsValid)
{
return;
}
var shoppingCart = (ShoppingCart)Session["cart"];
var availableBooks = (List <Book>)Session["books"];
Book selectedBook = BookCatalogDataAccess.GetBookById(drpBookSelection.SelectedValue);
BookOrder bookOrder = new BookOrder(selectedBook, int.Parse(txtQuantity.Text));
// updated the selected book list
shoppingCart.AddBookOrder(bookOrder);
// make a selected book unavailable
//availableBooks.Remove(availableBooks.Where(b => b.Id == selectedBook.Id).FirstOrDefault<Book>());
drpBookSelection.Items.Remove(drpBookSelection.Items.FindByValue(selectedBook.Id));
availableBooks.RemoveAll(b => b.Id == selectedBook.Id);
// display messages
lblDescription.Text = $"{txtQuantity.Text} copy of {selectedBook.Title} is added to the shopping cart";
lblNumItems.Text = shoppingCart.NumOfItems.ToString();
drpBookSelection.SelectedValue = "-1";
}
protected void drpBookSelection_SelectedIndexChanged(object sender, EventArgs e)
{
if (drpBookSelection.SelectedValue != "-1")
{
string bookId = drpBookSelection.SelectedItem.Value;
Book selectedBook = BookCatalogDataAccess.GetBookById(bookId);
//todo: Add selected book to the session
List <Book> books = Session["books"] as List <Book>;
if (books == null)
{
books = new List <Book>();
Session["books"] = books;
}
books.Add(selectedBook);
//todo: Display the selected book's description and price
lblDescription.Text = selectedBook.Description;
lblPrice.Text = "$" + selectedBook.Price.ToString();
}
else
{
//todo: Set description and price to blank
lblDescription.Text = "";
lblPrice.Text = "";
}
}
protected void btnAddToCart_Click(object sender, EventArgs e)
{
if (drpBookSelection.SelectedValue != "-1" && Session["shoppingcart"] != null)
{
//////todo: Retrieve selected book from the session
var book = BookCatalogDataAccess.GetBookById(drpBookSelection.SelectedValue);
////todo: get user entered quqntity
int quantity = Int16.Parse(txtQuantity.Text);
////todo: Create a book order with selected book and quantity
BookOrder order = new BookOrder(book, quantity);
////todo: Retrieve to cart from the session
var cart = (ShoppingCart)Session["shoppingcart"];
////todo: Add book order to the shopping cart
cart.AddBookOrder(order);
////todo: Remove the selected item from the dropdown list
drpBookSelection.Items.RemoveAt(drpBookSelection.SelectedIndex);
////todo: Set the dropdown list's selected value as "-1"
drpBookSelection.ClearSelection();
txtQuantity.Text = string.Empty;
////todo: Set the description to show title and quantity of the book user added to the shopping cart
lblDescription.Text = "You have added " + quantity + " copies of: " + book.Title;
////todo: Update the number of items in shopping cart displayed next to the link to ShoppingCartView.aspx
if (cart.NumOfItems == 0)
{
lblNumItems.Text = "empty";
}
else if (cart.NumOfItems == 1)
{
lblNumItems.Text = "1 item";
}
else
{
lblNumItems.Text = cart.NumOfItems.ToString() + " items";
}
}
}
protected void BookList_SelectedIndexChanged(object sender, EventArgs e)
{
if (BookList.SelectedValue != "-1")
{
Book book = BookCatalogDataAccess.GetBookById(BookList.SelectedValue);
lblPrice.Text = String.Format("{0:C}", book.Price);
lblDescription.Text = book.Description;
}
else
{
lblPrice.Text = "";
lblDescription.Text = "";
}
}
protected void drpBookSelection_SelectedIndexChanged(object sender, EventArgs e)
{
//Todo: Add your code here
if (drpBookSelection.SelectedValue != "-1")
{
Book selectedBook = BookCatalogDataAccess.GetBookById(drpBookSelection.SelectedValue);
lblPrice.Text = selectedBook.Price.ToString();
lblDescription.Text = selectedBook.Description;
}
else
{
lblDescription.Visible = false;
lblPrice.Visible = false;
}
}
protected void btnAddToCart_Click(object sender, EventArgs e)
{
Validate();
if (Page.IsValid)
{
Book book = BookCatalogDataAccess.GetBookById(BookList.SelectedValue);
int quantity = Int16.Parse(txtQauntity.Text);
BookOrder order = new BookOrder(book, quantity);
cart.AddBookOrder(order);
BookList.Items.RemoveAt(BookList.SelectedIndex);
string amount = quantity > 1 ? "copies" : "copy";
lblDescription.Text = quantity + " " + amount + " of " + book.Title + " have been added to your cart";
btnViewCart.Text = "View Cart (" + cart.NumOfItems + " items)";
BookList.ClearSelection();
txtQauntity.Text = "";
}
}
protected void drpBookSelection_SelectedIndexChanged(object sender, EventArgs e)
{
if (drpBookSelection.SelectedValue != "-1")
{
string bookId = drpBookSelection.SelectedItem.Value;
Book selectedBook = BookCatalogDataAccess.GetBookById(bookId);
//Add selected book to the session
Session["book"] = selectedBook;
//Display the selected book's description and price
lblDescription.Text = selectedBook.Description;
lblPrice.Text = "$" + selectedBook.Price;
}
else
{
//Set description and price to blank
lblDescription.Text = string.Empty;
lblPrice.Text = string.Empty;
}
}
protected void drpBookSelection_SelectedIndexChanged(object sender, EventArgs e)
{
if (drpBookSelection.SelectedValue != "-1")
{
string bookId = drpBookSelection.SelectedItem.Value;
Book selectedBook = BookCatalogDataAccess.GetBookById(bookId);
////todo: Add selected book to the session
///Why do I add the selected book to the session when the index changes and not when added to cart?
//todo: Display the selected book's description and price
lblPrice.Text = String.Format("{0:C}", selectedBook.Price);
lblDescription.Text = selectedBook.Description;
}
else
{
//todo: Set description and price to blank YES
lblPrice.Text = "";
lblDescription.Text = "";
}
}
public static ArrayList RetrieveAllBookOrders()
{
ArrayList orders = new ArrayList();
StreamReader sr = null;
try
{
string path = HttpContext.Current.Request.PhysicalApplicationPath;
string filePath = path + @"\App_Data\BookOrderList.txt";
if (!File.Exists(filePath))
{
return(orders);
}
FileStream bookOrderList = new FileStream(filePath, FileMode.Open, FileAccess.Read);
sr = new StreamReader(bookOrderList);
while (!sr.EndOfStream)
{
string bookId = sr.ReadLine();
int quantity = int.Parse(sr.ReadLine());
Book book = BookCatalogDataAccess.GetBookById(bookId);
BookOrder bookOrder = new BookOrder(book, quantity);
orders.Add(bookOrder);
}
}
catch (Exception)
{
ClearBookOrderList();
}
finally
{
if (sr != null)
{
sr.Close();
}
}
return(orders);
}
protected void btnAddToCart_Click(object sender, EventArgs e)
{
if (drpBookSelection.SelectedValue != "-1" && Session["shoppingcart"] != null)
{
string bookId = drpBookSelection.SelectedItem.Value;
Book selectedBook = BookCatalogDataAccess.GetBookById(bookId);
//todo: Retrieve selected book from the session
//Book book = Session["book"] as Book;
//todo: get user entered quqntity
int quantity = int.Parse(txtQuantity.Text);
//todo: Create a book order with selected book and quantity
BookOrder order = new BookOrder(selectedBook, quantity);
//todo: Retrieve to cart from the session
ShoppingCart cart = Session["shoppingcart"] as ShoppingCart;
//todo: Add book order to the shopping cart
cart.AddBookOrder(order);
//todo: Remove the selected item from the dropdown list
drpBookSelection.Items.Remove(drpBookSelection.SelectedItem);
//todo: Set the dropdown list's selected value as "-1"
//drpBookSelection.SelectedValue = "-1";
//todo: Set the description to show title and quantity of the book user added to the shopping cart
lblDescription.Text = quantity.ToString() + " copy(s) of " + selectedBook.Title + " is added to the shopping cart";
//todo: Update the number of items in shopping cart displayed next to the link to ShoppingCartView.aspx
if (cart.NumOfItems == 0)
{
lblNumItems.Text = "empty";
}
else if (cart.NumOfItems == 1)
{
lblNumItems.Text = "1 item";
}
else
{
lblNumItems.Text = cart.NumOfItems.ToString() + " items";
}
}
}
