public IQueryable GetBooks()
{
var _db = new Baitayonline.Models.BookContext();
IQueryable query = _db.Books;
return(query);
}
public IQueryable <Category> GetCategories()
{
var _db = new Baitayonline.Models.BookContext();
IQueryable <Category> query = _db.Categories;
return(query);
}
public IQueryable <Book> GetBooks([QueryString("id")] int?categoryId)
{
var _db = new Baitayonline.Models.BookContext();
IQueryable <Book> query = _db.Books;
if (categoryId.HasValue && categoryId > 0)
{
query = query.Where(p => p.CategoryID == categoryId);
}
return(query);
}
public IQueryable <Book> GetDetails([QueryString("productID")] int?bookId)
{
var _db = new Baitayonline.Models.BookContext();
IQueryable <Book> query = _db.Books;
if (bookId.HasValue && bookId > 0)
{
query = query.Where(p => p.BookID == bookId);
}
else
{
query = null;
}
return(query);
}
public void UpdateShoppingCartDatabase(String cartId, ShoppingCartUpdates[]
CartItemUpdates)
{
using (var db = new Baitayonline.Models.BookContext())
{
try
{
int CartItemCount = CartItemUpdates.Count();
List <CartItem> myCart = GetCartItems();
foreach (var cartItem in myCart)
{
// Lặp qua các hàng trong giỏ hàng
for (int i = 0; i < CartItemCount; i++)
{
if (cartItem.Book.BookID == CartItemUpdates[i].BookId)
{
if (CartItemUpdates[i].PurchaseQuantity < 1 ||
CartItemUpdates[i].RemoveItem == true)
{
RemoveItem(cartId, cartItem.BookId);
}
else
{
UpdateItem(cartId, cartItem.BookId,
CartItemUpdates[i].PurchaseQuantity);
}
}
}
}
}
catch (Exception exp)
{
throw new Exception("ERROR: Unable to Update Cart Database - " +
exp.Message.ToString(), exp);
}
}
}
protected void RemoveBookButton_Click(object sender, EventArgs e)
{
using (var _db = new Baitayonline.Models.BookContext())
{
int bookId = Convert.ToInt16(DropDownRemoveBook.SelectedValue);
var myItem = (from c in _db.Books
where c.BookID == bookId
select
c).FirstOrDefault();
if (myItem != null)
{
_db.Books.Remove(myItem);
_db.SaveChanges();
// Tải lại trang.
string pageUrl = Request.Url.AbsoluteUri.Substring(0,
Request.Url.AbsoluteUri.Count() - Request.Url.Query.Count());
Response.Redirect(pageUrl + "?BookAction=remove");
}
else
{
LabelRemoveStatus.Text = "Unable to locate book.";
}
}
}
public void UpdateItem(string updateCartID, int updateBookID, int
quantity)
{
using (var _db = new Baitayonline.Models.BookContext())
{
try
{
var myItem = (from c in _db.ShoppingCartItems
where c.CartId == updateCartID && c.Book.BookID ==
updateBookID
select c).FirstOrDefault();
if (myItem != null)
{
myItem.Quantity = quantity;
_db.SaveChanges();
}
}
catch (Exception exp)
{
throw new Exception("ERROR: Unable to Update Cart Item - " +
exp.Message.ToString(), exp);
}
}
}
public void RemoveItem(string removeCartID, int removeBookID)
{
using (var _db = new Baitayonline.Models.BookContext())
{
try
{
var myItem = (from c in _db.ShoppingCartItems
where c.CartId == removeCartID && c.Book.BookID ==
removeBookID
select c).FirstOrDefault();
if (myItem != null)
{
// Xóa
_db.ShoppingCartItems.Remove(myItem);
_db.SaveChanges();
}
}
catch (Exception exp)
{
throw new Exception("ERROR: Unable to Remove Cart Item - " +
exp.Message.ToString(), exp);
}
}
}