private static void DeleteAnOwnerWithAllCarsTheyOwn()
{
// 2. show all owners, choose an owner, empty means set owner to null
ListAllOwnersAndTheirCars();
Console.Write("Enter Id of an owner");
int ownerId = int.Parse(Console.ReadLine()); // FIXME
Owner owner = ctx.Owners.Find(ownerId);
if (owner == null)
{
Console.WriteLine("Owner not found");
return;
}
//
foreach (Car c in owner.CarsCollection.ToList <Car>())
{
ctx.Cars.Remove(c); // schedule for deletion
}
ctx.Owners.Remove(owner);
ctx.SaveChanges();
Console.WriteLine("Owner and their cars deleted");
}
static void AddCar()
{
Console.WriteLine("Please, enter the make and model:");
string makeModel = Console.ReadLine();
Console.WriteLine("Please, enter the year of production:");
string yearStr = Console.ReadLine();
if (!int.TryParse(yearStr, out int year))
{
Console.WriteLine("The year of production should be a valid integer");
return;
}
try
{
Car car = new Car()
{
MakeModel = makeModel, YearOfProd = year
};
ctx.Cars.Add(car);
ctx.SaveChanges();
Console.WriteLine("Person added.");
}
catch (ArgumentException ex)
{
Console.WriteLine("Person data invalid: " + ex.Message);
}
catch (DataException ex)
{
Console.WriteLine("Database problem: " + ex.Message);
}
catch (SystemException ex)
{
Console.WriteLine("Database problem: " + ex.Message);
}
}