public static void Main()
{
using (var db = new NorthwindEntities())
{
// To solve this task you need to change in the app.config file the connection string to:
// initial catalog=NorthwindTwin
Console.WriteLine(db.Database.CreateIfNotExists() ? "NorthwindTwin created!!" : "NorthWindTwin already exists");
}
}
public static void Main()
{
using (var db = new NorthwindEntities())
{
// Comment/uncomment to check each functionality -
Dao.InsertNewCustomersToDb(db);
Dao.ModifyNewInsertedCustomer(db);
Dao.DeleteNewInsertedCustomer(db);
}
}
public static void InsertNewCustomersToDb(NorthwindEntities db)
{
var newCustomer = new Customer
{
CustomerID = "1245",
CompanyName = "Telerik",
};
db.Customers.AddOrUpdate(newCustomer);
db.SaveChanges();
}
public static void Main()
{
using (var db = new NorthwindEntities())
{
foreach (var employee in db.Employees.Include("Territories"))
{
var correspondingTerritoriesAsString = string.Join(", ", employee.Territories
.Select(c => c.TerritoryDescription.Trim()));
Console.WriteLine("{0} -> Territorries: {1}", employee.FirstName, correspondingTerritoriesAsString);
}
}
}
public static void Main()
{
using (var db = new NorthwindEntities())
{
var customers = db.Customers
.Where(c => c.Orders.Any(o => o.OrderDate.Value.Year == 1997 &&
o.ShipCountry == "Canada"))
.Select(c => c.ContactName)
.ToList();
Console.WriteLine(string.Join(Environment.NewLine, customers));
}
}
public static void Main()
{
using (var nw1 = new NorthwindEntities())
{
using (var nw2 = new NorthwindEntities())
{
var rowFromFirst = nw1.Customers
.First(c => c.ContactName.StartsWith("A"));
var rowFromSecond = nw2.Customers
.First(c => c.ContactName.StartsWith("A"));
rowFromFirst.ContactName = "Pesho";
rowFromSecond.ContactName = "Gosho";
// Which was saved later will prevail
// nw1.SaveChanges();
// nw2.SaveChanges();
}
}
}
public static void Main()
{
Console.Write("Enter region of the sale (e.g. sp, bc, null works too but a lot of them will come) ");
var region = Console.ReadLine().ToUpper();
if (string.IsNullOrWhiteSpace(region))
{
region = null;
}
Console.Write("Enter start date (years ago, will search until now): ");
int startDateInput;
int.TryParse(Console.ReadLine(), out startDateInput);
var startDate = DateTime.Now.AddYears(-startDateInput);
var endDate = DateTime.Now;
using (var db = new NorthwindEntities())
{
var orders = db.Orders
.Where(o => o.ShipRegion == region &&
o.OrderDate >= startDate &&
o.OrderDate <= endDate)
.ToList();
if (orders.Any())
{
Console.WriteLine("OrderID " +
string.Join(Environment.NewLine + "OrderID ", orders.Select(o => o.OrderID)));
Console.WriteLine("Number of orders: " + orders.Count);
}
else
{
Console.WriteLine("No such sales");
}
}
}
public static void ModifyNewInsertedCustomer(NorthwindEntities db)
{
var customer = db.Customers.FirstOrDefault(c => c.CustomerID == "1245");
customer.ContactTitle = "Big Boss";
db.SaveChanges();
}
public static void DeleteNewInsertedCustomer(NorthwindEntities db)
{
var customer = db.Customers.FirstOrDefault(c => c.CustomerID == "1245");
db.Customers.Remove(customer);
db.SaveChanges();
}