public IActionResult OnGet()
{
Purchase = new Core.Purchase();
var customers = customerData.GetCustomers().ToList().Select(p => new { Id = p.Id, Display = $"{p.FirstName} {p.LastName}" });
Customers = new SelectList(customers, "Id", "Display");
return(Page());
}
public double GetTotalPurchase(Core.Purchase purchase)
{
return(purchaseBL.TotalPurchase(purchase));
}