private string CustomersExist(Dto.Customer[] customers, Guid userId)
{
var result = string.Empty;
var existingCustomers = _customerBusiness.GetAll(userId);
if (existingCustomers == null)
{
return(result);
}
var customerTitles = customers.Select(c => c.Title);
var existingCustomerTitles = existingCustomers.Select(c => c.Title);
var findings = from title in customerTitles
join existingTitle in existingCustomerTitles
on title equals existingTitle
select title;
var array = findings as string[] ?? findings.ToArray();
if (array.Any())
{
result = array.First();
}
return(result);
}
public List <Customer> GetAll()
{
return(_customerBusiness.GetAll());
}