public Customer GetCustomer(int id)
{
Customer customer = new Customer();
customer.Id = id;
customer = new entityServices.CustomerService().Load(customer);
return customer;
}
public void UpdateCustomer(Customer customer)
{
Guid dataSignature = DataSignature.Current;
if (dataSignature == Guid.Empty)
{
//this is an update method, so no data signature to
//compare against is an exception:
throw new FaultException<NoDataSignature>(new NoDataSignature());
}
Customer currentState = CustomerEntityService.Load(customer);
Guid currentDataSignature = DataSignature.Sign(currentState);
//if the data signatures match then update:
if (currentDataSignature == dataSignature)
{
CustomerEntityService.Update(customer);
}
else
{
//otherwise, throw concurrency violation exception:
throw new FaultException<ConcurrencyViolation>(new ConcurrencyViolation());
}
}