public static void Import()
{
var carsToAdd = Directory.GetFiles(Directory.GetCurrentDirectory() + "/JsonFiles/")
.Where(f => f.EndsWith(".json"))
.Select(f => File.ReadAllText(f))
.SelectMany(str => JsonConvert.DeserializeObject <IEnumerable <CarJsonModel> >(str))
.ToList();
var addedCities = new HashSet <string>();
var addedManufacturers = new HashSet <string>();
Console.WriteLine("Addind cars");
var addedCars = 0;
var db = new CarsSystemDbContext();
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ValidateOnSaveEnabled = false;
foreach (var car in carsToAdd)
{
var cityName = car.Dealer.City;
if (!addedCities.Contains(cityName))
{
var city = new City
{
Name = cityName,
};
db.Cities.Add(city);
db.SaveChanges();
addedCities.Add(cityName);
}
var manufacturer = car.ManufacturerName;
if (!addedManufacturers.Contains(manufacturer))
{
var newManufacturer = new Manufacturer
{
Name = manufacturer
};
addedManufacturers.Add(manufacturer);
db.Manufacturers.Add(newManufacturer);
db.SaveChanges();
}
var dealerToAdd = new Dealer
{
Name = car.Dealer.Name
};
var dbCity = db.Cities.FirstOrDefault(c => c.Name == cityName);
dealerToAdd.Cities.Add(dbCity);
var dbManufacturer = db.Manufacturers.FirstOrDefault(m => m.Name == car.ManufacturerName);
var carToAdd = new Car
{
Manufacturer = dbManufacturer,
Dealer = dealerToAdd,
Model = car.Model,
Price = car.Price,
Transmission = (TransmissionType)car.TransmissionType,
Year = car.Year
};
db.Cars.Add(carToAdd);
if (addedCars % 100 == 0)
{
Console.Write(".");
db.SaveChanges();
db.Dispose();
db = new CarsSystemDbContext();
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ValidateOnSaveEnabled = false;
}
addedCars++;
}
db.SaveChanges();
db.Configuration.AutoDetectChangesEnabled = true;
}
public static void Import()
{
Stopwatch sw = new Stopwatch();
sw.Start();
var carsToAdd = Directory
.GetFiles(Directory.GetCurrentDirectory() + "/Data.Json.Files/")
.Where(f => f.EndsWith(".json"))
.Select(File.ReadAllText)
.SelectMany(JsonConvert.DeserializeObject <IEnumerable <JsonCarModel> >)
.ToList();
var addedCities = new HashSet <string>();
var addedManufacturers = new HashSet <string>();
Console.WriteLine("Adding cars");
var addedCars = 0;
var db = new CarsSystemDbContext();
// OPTIMIZATION?
// db.Configuration.AutoDetectChangesEnabled = false;
// db.Configuration.ValidateOnSaveEnabled = false;
foreach (var car in carsToAdd)
{
var cityName = car.Dealer.City;
if (!addedCities.Contains(cityName))
{
addedCities.Add(cityName);
db.Cities.Add(new City()
{
Name = cityName
});
db.SaveChanges();
}
var dbCityToAdd = db.Cities.FirstOrDefault(c => c.Name == cityName);
var manufacturer = car.ManufacturerName;
if (!addedManufacturers.Contains(manufacturer))
{
addedManufacturers.Add(manufacturer);
db.Manufacturers.Add(new Manufacturer()
{
Name = manufacturer
});
db.SaveChanges();
}
var manufacturerToAdd = db.Manufacturers.FirstOrDefault(m => m.Name == manufacturer);
var dealerToAdd = new Dealer()
{
Name = car.Dealer.Name
};
var carToAdd = new Car()
{
Manufacturer = manufacturerToAdd,
Dealer = dealerToAdd,
Model = car.Model,
Price = car.Price,
TransmissionType = (TransmissionType)car.TransmissionType,
Year = car.Year
};
db.Cars.Add(carToAdd);
addedCars++;
if (addedCars % 100 == 0)
{
Console.Write(".");
db.SaveChanges();
db.Dispose();
db = new CarsSystemDbContext();
// OPTIMIZATION?
// db.Configuration.AutoDetectChangesEnabled = false;
// db.Configuration.ValidateOnSaveEnabled = false;
}
if (addedCars % 1000 == 0)
{
Console.WriteLine(addedCars + " ");
}
}
db.SaveChanges();
sw.Stop();
Console.WriteLine(sw.Elapsed);
}
