public void AddCustomer(string firstName, string lastName, string telephoneNumber, string email)
{
Customer customer = new Customer
{
FirstName = firstName,
LastName = lastName,
TelephoneNumber = telephoneNumber,
Email = email
};
if (!customer.IsValid())
{
throw new ArgumentException();
}
Data.Customers.Add(customer);
}
public void AddCustomer(string firstName, string lastName, string telephoneNumber, string email)
{
List <Customer> customers = GetCustomers();
int highestCustomerId = customers.Count > 0 ? customers.Max(i => i.Id) : 0;
Customer customer = new Customer
{
Id = highestCustomerId + 1,
FirstName = firstName,
LastName = lastName,
TelephoneNumber = telephoneNumber,
Email = email
};
if (!customer.IsValid())
{
throw new ArgumentException();
}
Data.Customers.Add(customer);
}
public void ChangeCustomer(int customerId, Customer newDetails)
{
Customer customer = Data.Customers.SingleOrDefault(c => c.Id == customerId);
newDetails.Id = customerId;
List <Customer> customers = GetCustomers();
if (customer == null || !customers.Contains(customer) || newDetails == null || !newDetails.IsValid())
{
throw new ArgumentException();
}
int index = customers.FindIndex(c => c == customer);
customers[index] = newDetails;
}
public void ChangeCustomer(Customer customer, Customer newDetails)
{
List <Customer> customers = GetCustomers();
if (customer == null || !customers.Contains(customer) || newDetails == null || !newDetails.IsValid())
{
throw new ArgumentException();
}
int index = customers.FindIndex(c => c == customer);
customers[index] = newDetails;
}