public ActionResult <List <SalesOrderDto> > GetSalesOrders([FromQuery] int?customerId)
{
// Query string parameters are allowed here; the name of the parameter defines what the search will be.
IList <SalesOrder> salesOrders = null;
if (customerId != null)
{
salesOrders = salesOrdersService.ReadSalesOrdersByCustomerId((int)customerId).ToList();
}
else
{
salesOrders = salesOrdersService.ReadSalesOrders().ToList();
}
List <SalesOrderDto> salesOrderDtos = new List <SalesOrderDto>();
foreach (SalesOrder salesOrder in salesOrders)
{
salesOrderDtos.Add(new SalesOrderDto(salesOrder));
}
return(salesOrderDtos);
}