public void ParseAllFiles()
{
Console.WriteLine("Importing cars from JSON");
db.Configuration.AutoDetectChangesEnabled = false;
for (int i = 0; i < 5; i++)
{
Console.WriteLine("From file No {0}", i + 1);
currentListOfCars = this.LoadFile(rootPath + "data." + i + ".json");
var index = 0;
foreach (var car in currentListOfCars)
{
var currentCarToImport = new Car
{
Year = car.Year,
TransmissionType = (TransmissionType)car.TransmissionType,
Model = car.Model,
Price = car.Price
};
var manufacturer = this.db.Manufacturers.FirstOrDefault(m => m.Name == car.ManufacturerName);
if (manufacturer == null)
{
manufacturer = new Manufacturer
{
Name = car.ManufacturerName
};
}
currentCarToImport.Manufacturer = manufacturer;
var dealer = this.db.Dealers.FirstOrDefault(d => d.Name == car.Dealer.Name);
if (dealer == null)
{
dealer = new Dealer
{
Name = car.Dealer.Name
};
}
var city = this.db.Cities.FirstOrDefault(c => c.Name == car.Dealer.City);
if (city == null)
{
city = new City
{
Name = car.Dealer.City
};
}
dealer.Cities.Add(city);
currentCarToImport.Dealer = dealer;
db.Cars.Add(currentCarToImport);
db.SaveChanges();
index++;
if (index % 100 == 0)
{
Console.Write(".");
}
}
db.SaveChanges();
Console.WriteLine("Importing from file No {0} finished!", i + 1);
}
db.Configuration.AutoDetectChangesEnabled = true;
Console.WriteLine("Importing cars from JSON finished!");
}
private static City GetCity(string cityName)
{
var city = db.Cities.FirstOrDefault(c => c.Name == cityName);
if (city == null)
{
city = new City
{
Name = cityName
};
}
return city;
}
private City GetOrCreateCity(string name)
{
City city;
this.cities.TryGetValue(name, out city);
if (city == null)
{
city = new City()
{
Name = name
};
this.cities[name] = city;
}
return city;
}
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<JsonCar>>(str))
.ToList();
var addedCities = new HashSet<string>();
var addedManufacturers = new HashSet<string>();
var addedCars = 0;
var db = new CarsDbContext();
db.Configuration.AutoDetectChangesEnabled = false;
Console.WriteLine("Adding cars");
foreach (var car in carsToAdd)
{
var cityName = car.Dealer.City;
if (!addedCities.Contains(car.Dealer.City))
{
var city = new City
{
Name = cityName
};
db.Cities.Add(city);
db.SaveChanges();
addedCities.Add(cityName);
}
var manufacturer = car.ManufacturerName;
if (!addedManufacturers.Contains(car.ManufacturerName))
{
var newManufacturer = new Manufacturer
{
Name = manufacturer
};
addedManufacturers.Add(manufacturer);
db.Manufacturers.Add(newManufacturer);
db.SaveChanges();
}
var dealerToAdd = new Cars.Models.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,
TransmissionType = car.TransmissionType,
Year = (short)car.Year
};
db.Cars.Add(carToAdd);
if (addedCars % 100 == 0)
{
Console.Write(".");
db.SaveChanges();
db.Dispose();
db = new CarsDbContext();
db.Configuration.AutoDetectChangesEnabled = false;
}
addedCars++;
}
db.SaveChanges();
db.Configuration.AutoDetectChangesEnabled = true;
}
