//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);
}