public static SqlStatement Insert(Dictionary<string,object> settings)
        {
            var sql=new SqlStatement("TailspinConnectionString");
                StringBuilder sb=new StringBuilder();
                sb.Append("INSERT INTO [dbo].[Addresses](");
                int indexer=1;
                foreach(string key in settings.Keys){

                    sb.Append(key);
                    if(indexer<settings.Count)
                        sb.Append(",");

                    sql.AddInsertValue(key,settings[key]);
                    indexer++;
                }
                sb.AppendLine(")");
                sql.Add(sb.ToString());
                return sql;
        }

 public static SqlStatement Delete()
 {
     var sql=new SqlStatement("TailspinConnectionString");
         sql.Add("DELETE FROM [dbo].[CustomerEvents]");
         return sql;
 }

 public static SqlStatement Update(Dictionary<string,object> settings)
 {
     var sql=new SqlStatement("TailspinConnectionString");
         sql.Add(string.Format("UPDATE {0} SET ","[dbo].[CustomerBehaviors]"));
         foreach(string key in settings.Keys){
             sql.AddSetting(key,settings[key]);
         }
         return sql;
 }

        public static SqlStatement Select(params string[] columns)
        {
            //for jon galloway
                var sql=new SqlStatement("TailspinConnectionString");
                StringBuilder sb=new StringBuilder();
                sb.Append("SELECT ");

                int indexer=1;
                foreach(string s in columns){
                    string qualifiedName=s;
                    if(QualifiedColumns.ContainsKey(s))
                        qualifiedName=QualifiedColumns[s];
                    sb.AppendFormat("{0}",qualifiedName);
                    if(indexer<columns.Length)
                        sb.Append(",");
                    indexer++;
                }
                sb.AppendFormat("\r\nFROM {0} ",TABLE_NAME);
                sb.AppendLine();
                sql.Add(sb.ToString());
                return sql;
        }

 public void Append(SqlStatement sql)
 {
     sqlList.Add(sql);
 }

        public static bool RecordExists( string connStringName,string tableName, Dictionary<string, object> values)
        {
            var sb = new StringBuilder();
            SqlStatement sql = new SqlStatement(connStringName);
            sql.Add("SELECT " + values.First().Key);
            sql.Add(" FROM " + tableName);

            object result = null;
            int indexer = 1;
            foreach (string s in values.Keys) {
                if (indexer == 1) {
                    sql.Where(s, values[s]);
                } else {
                    sql.And(s, values[s]);
                }
                indexer++;
            }
            using (var cmd = sql.BuildCommand()) {
                result = cmd.ExecuteScalar();
            }
            return result != null;
        }

        DbCommand GetAddressCommand(Address address)
        {
            var sql = new SqlStatement(connectionStringName);

            var settings = new Dictionary<string, object>()
                {
                    {AddressesTable.Columns.UserName, address.UserName},
                    {AddressesTable.Columns.FirstName, address.FirstName},
                    {AddressesTable.Columns.LastName, address.LastName},
                    {AddressesTable.Columns.Email, address.Email},
                    {AddressesTable.Columns.Street1, address.Street1},
                    {AddressesTable.Columns.Street2, address.Street2 != null ? address.Street2 : ""},
                    {AddressesTable.Columns.City, address.City},
                    {AddressesTable.Columns.StateOrProvince, address.StateOrProvince},
                    {AddressesTable.Columns.Zip, address.Zip},
                    {AddressesTable.Columns.Country, address.Country},
                    {AddressesTable.Columns.IsDefault, address.IsDefault}
               };

            if (SqlHelper.RecordExists(connectionStringName,AddressesTable.TABLE_NAME, new Dictionary<string, object>()
                {
                    {AddressesTable.Columns.UserName,address.UserName},
                    {AddressesTable.Columns.Street1,address.Street1},
                    {AddressesTable.Columns.City,address.City},
                    {AddressesTable.Columns.StateOrProvince,address.StateOrProvince},
                }))
            {
                //update
                sql = AddressesTable.Update(settings)
                    .Where(AddressesTable.Columns.UserName, address.UserName)
                    .And(AddressesTable.Columns.Street1, address.Street1)
                    .And(AddressesTable.Columns.City, address.City)
                    .And(AddressesTable.Columns.StateOrProvince, address.StateOrProvince);

            } else {
                //insert
                sql = AddressesTable.Insert(settings);

            }
            var cmd = sql.BuildCommand();

            //add the params
            return cmd;
        }

        public Customer GetCustomer(string userName)
        {
            var productRepo = new SimpleProductRepository();
            Customer result = null;
            var batch = new BatchSql();

            //see if there's a customer - if not create one
            object user = CustomersTable.Select(CustomersTable.Columns.UserName)
                .Where(CustomersTable.Columns.UserName, userName)
                .BuildCommand()
                .ExecuteScalar();

            if (user == null) {
                CustomersTable.Insert(
                    new Dictionary<string, object>() {
                    {CustomersTable.Columns.UserName,userName},
                    {CustomersTable.Columns.LanguageCode,System.Globalization.CultureInfo.CurrentCulture.TwoLetterISOLanguageName}
                })
                .BuildCommand()
                .ExecuteNonQuery();
            }

            //customer
            batch.Append(CustomersTable.Select()
                .Where(CustomersTable.Columns.UserName, userName));

            //addresses
            batch.Append(AddressesTable.Select()
                .Where(AddressesTable.Columns.UserName, userName));

            //shopping cart
            Guid orderID = GetCartID(userName);
            batch.Append(OrdersTable.Select()
                .Where(OrdersTable.Columns.OrderID, orderID));

            //items
            //avert your eyes if this bothers you
            var itemSql = new SqlStatement(connectionStringName);
            itemSql.Add(string.Format("SELECT {0}, {1} ", OrderItemsTable.COLUMN_LIST, ProductsTable.COLUMN_LIST));
            itemSql.InnerJoin(
                OrderItemsTable.TABLE_NAME,
                OrderItemsTable.ColumnsQualified.SKU,
                ProductsTable.TABLE_NAME,
                ProductsTable.ColumnsQualified.SKU)
                .Where(OrderItemsTable.Columns.OrderID, orderID);

            batch.Append(itemSql);

            var cmd = batch.BuildCommand(connectionStringName);

            using (var rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection)) {
                //customer
                if (rdr.Read()) {
                    result = new Customer(userName,
                        CustomersTable.ReadEmail(rdr),
                        CustomersTable.ReadFirst(rdr),
                        CustomersTable.ReadLast(rdr));
                } else {
                    result = new Customer();
                }
                //address
                result.AddressBook = new List<Address>();
                if (rdr.NextResult()) {
                    while (rdr.Read()) {
                        result.AddressBook.Add(LoadAddress(rdr));

                    }
                }
                //cart
                result.Cart = new ShoppingCart(userName);
                if (rdr.NextResult()) {
                    if (rdr.Read()) {
                        result.Cart.ShippingAddress = result.AddressBook.SingleOrDefault(x => x.AddressID == OrdersTable.ReadShippingAddressID(rdr));
                        result.Cart.BillingAddress = result.AddressBook.SingleOrDefault(x => x.AddressID == OrdersTable.ReadBillingAddressID(rdr));
                        result.Cart.ShippingService = OrdersTable.ReadShippingService(rdr) ?? "";
                        result.Cart.ShippingAmount = OrdersTable.ReadShippingAmount(rdr);
                        result.Cart.TaxAmount = OrdersTable.ReadTaxAmount(rdr);
                    }
                }

                //items
                if (rdr.NextResult()) {
                    while (rdr.Read()) {
                        var product = productRepo.LoadProduct(rdr);
                        result.Cart.Items.Add(new ShoppingCartItem(product, CartItemsTable.ReadQuantity(rdr), CartItemsTable.ReadDateAdded(rdr)));
                    }
                }
            }

            return result;
        }

        public int SaveAddress(Address address)
        {
            GetAddressCommand(address).ExecuteNonQuery();

            var sql = string.Format("SELECT MAX({0}) FROM {1} WHERE {2} = @p0",
                AddressesTable.ColumnsQualified.AddressID,
                AddressesTable.TABLE_NAME,
                AddressesTable.ColumnsQualified.UserName);
            var cmd = new SqlStatement(connectionStringName).Add(sql).BuildCommand();
            cmd.AddParameter("@p0", address.UserName);
            object id = cmd.ExecuteScalar();
            return (int)id;
        }

        public Order GetOrder(Guid orderID)
        {
            SimpleProductRepository productRepository = new SimpleProductRepository();
            SimpleCustomerRepository customerRepository = new SimpleCustomerRepository();
            Order result = null;

            var batch = new BatchSql();

            batch.Append(OrdersTable.Select().Where("OrderID", orderID));

            //items

            //products for the items
            var sql = new SqlStatement(connectionStringName);
            sql.Add("SELECT ");
            sql.Add(ProductsTable.COLUMN_LIST);
            sql.Add(OrderItemsTable.COLUMN_LIST);
            sql.Add("FROM Products INNER JOIN OrderItems ON Products.SKU = OrderItems.SKU");
            sql.Add("WHERE SKU IN (SELECT SKU FROM OrderItems WHERE [email protected])");

            //transactions
            batch.Append(TransactionsTable.Select().Where("orderid", orderID));

            int shippingAddressID = 0;
            int billingAddressID = 0;
            int shippingMethodID=0;

            //pull it
            var cmd = sql.BuildCommand();

            using (var rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection)) {
                if (rdr.Read()) {
                    result = new Order(OrdersTable.ReadOrderStatusID(rdr))
                    {
                        DateCreated =OrdersTable.ReadCreatedOn(rdr),
                        DateShipped = OrdersTable.ReadDateShipped(rdr),
                        UserName = OrdersTable.ReadUserName(rdr),
                        DiscountAmount = OrdersTable.ReadDiscountAmount(rdr),
                        DiscountReason =OrdersTable.ReadDiscountReason(rdr),
                        EstimatedDelivery = OrdersTable.ReadEstimatedDelivery(rdr),
                        ID = orderID,
                        OrderNumber = OrdersTable.ReadOrderNumber(rdr),
                        ShippingAmount = OrdersTable.ReadShippingAmount(rdr),
                        ShippingService=OrdersTable.ReadShippingService(rdr),
                        TaxAmount = OrdersTable.ReadTaxAmount(rdr),

                    };

                    billingAddressID = OrdersTable.ReadBillingAddressID(rdr);
                    shippingAddressID = OrdersTable.ReadShippingAddressID(rdr);

                }

                //load the items
                result.Items = new List<OrderLine>();
                if (rdr.NextResult()) {
                    while (rdr.Read()) {
                        var product = productRepository.LoadProduct(rdr);
                        var item = new OrderLine(OrderItemsTable.ReadDateAdded(rdr),OrderItemsTable.ReadQuantity(rdr),product);
                        result.Items.Add(item);
                    }
                }

                //transactions
                result.Transactions = new List<Transaction>();
                if (rdr.NextResult()) {
                    while (rdr.Read()) {
                        Transaction t = new Transaction(
                            TransactionsTable.ReadTransactionID(rdr),
                            orderID,
                            TransactionsTable.ReadAmount(rdr),
                            TransactionsTable.ReadTransactionDate(rdr),
                            TransactionsTable.ReadAuthorizationCode(rdr),
                            TransactionsTable.ReadNotes(rdr),
                            TransactionsTable.ReadProcessor(rdr));

                        result.Transactions.Add(t);

                    }
                }

            }
            sql = new SqlStatement(connectionStringName);

            //addresses
            batch.Append(AddressesTable.Select().Where("addressid", shippingAddressID));

            batch.Append(AddressesTable.Select().Where("addressid", billingAddressID));

            //shipping method
            batch.Append(ShippingMethodsTable.Select().Where("shippingmethodid", shippingMethodID));

            cmd = batch.BuildCommand(connectionStringName);

            using (var rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection)) {

                //shipping address
                if (rdr.Read()) {
                    //shipping
                    result.ShippingAddress = customerRepository.LoadAddress(rdr);
//.........这里部分代码省略.........