public WCSA_Entity_Classes.Customer GetByName(string name)
        {
            string        query  = "SELECT Name, Mail,  Address,Phone, Nid, License FROM CUSTOMER WHERE Name=" + name;
            SqlDataReader reader = DataAccess.GetData(query);

            reader.Read();

            WCSA_Entity_Classes.Customer customer = null;
            if (reader.HasRows)
            {
                customer         = new WCSA_Entity_Classes.Customer();
                customer.Name    = reader["Name"].ToString();
                customer.Mail    = reader["Mail"].ToString();
                customer.Phone   = reader["Phone"].ToString();
                customer.Address = reader["Address"].ToString();
                customer.NID     = reader["Nid"].ToString();
                customer.License = reader["License"].ToString();
            }
            return(customer);
        }
        public List <WCSA_Entity_Classes.Customer> GetAll()
        {
            string        query  = "SELECT Name, Mail,  Address,Phone, Nid, License FROM CUSTOMER";
            SqlDataReader reader = DataAccess.GetData(query);

            WCSA_Entity_Classes.Customer        customer     = null;
            List <WCSA_Entity_Classes.Customer> customerList = new List <WCSA_Entity_Classes.Customer>();

            while (reader.Read())
            {
                customer         = new WCSA_Entity_Classes.Customer();
                customer.Name    = reader["Name"].ToString();
                customer.Mail    = reader["Mail"].ToString();
                customer.Address = reader["Address"].ToString();
                customer.Phone   = reader["Phone"].ToString();
                customer.NID     = reader["Nid"].ToString();
                customer.License = reader["License"].ToString();

                customerList.Add(customer);
            }
            return(customerList);
        }
        public int Edit(WCSA_Entity_Classes.Customer customer)
        {
            string query = "UPDATE CUSTOMER SET Mail='" + customer.Mail + "', Address='" + customer.Address + "',Phone='" + customer.Phone + "', Name='" + customer.Name + "', License='" + customer.License + "' WHERE Nid='" + customer.NID + "'";

            return(DataAccess.ExecuteQuery(query));
        }
        public int Add(WCSA_Entity_Classes.Customer customer)
        {
            string query = string.Format("INSERT INTO CUSTOMER (Name, Mail,  Address,Phone, Nid, License) VALUES('{0}', '{1}', '{2}', '{3}', '{4}', '{5}')", customer.Name, customer.Mail, customer.Address, customer.Phone, customer.NID, customer.License);

            return(DataAccess.ExecuteQuery(query));
        }