//添加图书到购物车 public int addBookToCart(Book book, int customerID, int amount) { if (book.bookAmount >= amount && amount > 0 ) { CartBookItem[] item; if (cartBook == null) { cartBook = new CartBook(customerID); } item = cartBook.CartBookTableToCartBookItem(); for (int i = 0; i < item.Length; i++) { if (item[i].bookID == book.bookID) { return 0; } } return cartBook.addBookToCart(customerID, book.bookID, amount); } else { return 0; } }
//清空购物车 public int clearCart(int customerID) { if (cartBook == null) { cartBook = new CartBook(customerID); } return cartBook.getCart().clearCart(customerID); }
//根据不同的卖家生成不同订单 //customerID: 顾客的ID //cartBook: 顾客的购物车信息 public int generateOrder(int customerID) { cartBook = new CartBook(customerID); DataView dataview = cartBook.getCartBookTable().DefaultView; try { if (dataview.Table.Rows.Count > 0) { //根据买家ID对购物车信息排序 dataview.Sort = "seller_id DESC"; DataTable tableTemp = dataview.ToTable(); int i = 0; int index = i; int temp = Convert.ToInt32(tableTemp.Rows[i]["seller_id"]); //遍历表,寻找相同seller_id的数据 for (i = 0; i < dataview.Table.Rows.Count - 1; i++) { int id = Convert.ToInt32(tableTemp.Rows[i + 1]["seller_id"]); if (id != temp) { int n = i - index + 1; Book[] book = new Book[n]; for (int j = 0; index <= i; index++, j++) { book[j] = new Book(); book[j].bookTitle = tableTemp.Rows[index]["book_title"].ToString(); book[j].bookID = Convert.ToInt32(tableTemp.Rows[index]["book_id"]); book[j].sellerID = Convert.ToInt32(tableTemp.Rows[index]["seller_id"]); book[j].bookPrice = (float)Convert.ToDouble(tableTemp.Rows[index]["book_price"]); book[j].bookAmount = Convert.ToInt32(tableTemp.Rows[index]["cart_amount"]); } //插入订单 order.generateOrder(customerID, book[0].sellerID, book); } } Book[] b = new Book[i - index + 1]; for (int j = 0; index <= i; index++, j++) { b[j] = new Book(); b[j].bookID = Convert.ToInt32(tableTemp.Rows[index]["book_id"]); b[j].bookTitle = tableTemp.Rows[index]["book_title"].ToString(); b[j].sellerID = Convert.ToInt32(tableTemp.Rows[index]["seller_id"]); b[j].bookPrice = (float)Convert.ToDouble(tableTemp.Rows[index]["book_price"]); b[j].bookAmount = Convert.ToInt32(tableTemp.Rows[index]["cart_amount"]); } //提交最后一份订单 order.generateOrder(customerID, b[0].sellerID, b); return 1; } else { return 0; } } catch (Exception e) { Console.WriteLine(e.ToString()); return 0; } }
//更改购物车数量 public int changeAmount(int customerID,int bookID, int newAmount) { CartBookItem[] item; if (cartBook == null) { cartBook = new CartBook(customerID); } //提取购物车信息 item = cartBook.CartBookTableToCartBookItem(); int i = 0; for (; i < item.Length; i++) { if (item[i].bookID == bookID) { break; } } if (newAmount <= item[i].bookAmount && newAmount > 0) { return cartBook.changeAmount(customerID, bookID, newAmount); } else { return 0; } }
//删除购物车某一项 public int removeBook(int customerID,int bookID) { if (cartBook == null) { cartBook = new CartBook(); } return cartBook.removeBook(customerID, bookID); }
public void setCartBook(int customer_id) { cartBook = new CartBook(customer_id); }
public cartBLL(int customer_id) { cartBook = new CartBook(customer_id); }