public void SetupAndInsertObject()
{
AutoFacContainer container = new AutoFacContainer();
container.RegisterOptions <PostgreSQLEFOptions>();
container.ContainerBuilder.Register(context =>
{
var options = context.Resolve <PostgreSQLEFOptions>();
var builder = new DbContextOptionsBuilder <CodeFirstContext>();
builder.UseNpgsql(options.ConnectionString);
return(builder.Options);
});
container.ContainerBuilder.RegisterType <CodeFirstContext>();
var serivcesContainer = container.ContainerBuilder.Build();
using (CodeFirstContext context = serivcesContainer.Resolve <CodeFirstContext>())
{
context.Database.EnsureCreated();
context.Users.Add(new User()
{
Name = "Tom",
YearBirth = 2001,
IsMale = true
});
context.SaveChanges();
}
}
public void QueryObject()
{
AutoFacContainer container = new AutoFacContainer();
container.RegisterOptions <PostgreSQLEFOptions>();
container.ContainerBuilder.Register(context =>
{
var options = context.Resolve <PostgreSQLEFOptions>();
var builder = new DbContextOptionsBuilder <CodeFirstContext>();
builder.UseNpgsql(options.ConnectionString);
return(builder.Options);
});
container.ContainerBuilder.RegisterType <CodeFirstContext>();
var serivcesContainer = container.ContainerBuilder.Build();
using (CodeFirstContext context = serivcesContainer.Resolve <CodeFirstContext>())
{
context.Database.EnsureCreated();
// select * from "Users" where IsMale = true and Age > 80
var users = context.Users
//.Where(u => u.IsMale == true && u.YearBirth > 2005)
//.GroupBy(u => u.YearBirth)
.ToList();
var cars = context.Cars.ToList();
var avgCarYear = users//.AsParallel()
.Select(user => cars.Where(car => car.Year == user.YearBirth && car.Id % 2 == 1))
.Aggregate(new List <Car>(), (seed, _cars) =>
{
seed.AddRange(_cars);
return(seed);
})
.Average(car => car.Year);
Debugger.Break();
context.SaveChanges();
}
}
public void InsertRandomUsers()
{
AutoFacContainer container = new AutoFacContainer();
container.RegisterOptions <PostgreSQLEFOptions>();
container.ContainerBuilder.Register(context =>
{
var options = context.Resolve <PostgreSQLEFOptions>();
var builder = new DbContextOptionsBuilder <CodeFirstContext>();
builder.UseNpgsql(options.ConnectionString);
return(builder.Options);
});
container.ContainerBuilder.RegisterType <CodeFirstContext>();
var serivcesContainer = container.ContainerBuilder.Build();
using (CodeFirstContext context = serivcesContainer.Resolve <CodeFirstContext>())
{
context.Database.EnsureCreated();
Random rnd = new Random(DateTime.Now.Millisecond);
for (int i = 0; i < 100; i++)
{
context.Users.Add(new User()
{
Name = $"User {i}",
YearBirth = (int)(1985 + rnd.NextDouble() * 30),
IsMale = rnd.NextDouble() > 0.5d
});
context.Cars.Add(new Car()
{
Year = (int)(1985 + rnd.NextDouble() * 30),
Made = rnd.NextDouble() > 5d ? "Toyota":"BMW"
});
}
context.SaveChanges();
}
}