public static void AddProducts(Product[] products)
{
using (DbNorthwind db = new DbNorthwind())
{
foreach (Product prod in products)
{
var cat = from c in db.Category
where c.CategoryID == prod.Category.CategoryID
select c;
if (cat.Count() == 0)
prod.Category.CategoryID = Convert.ToInt32(db.InsertWithIdentity(prod.Category));
else
prod.Category = cat.First();
var sup = from s in db.Supplier
where s.SupplierID == prod.Supplier.SupplierID
select s;
if (sup.Count() == 0)
prod.Supplier.SupplierID = Convert.ToInt32(db.InsertWithIdentity(prod.Supplier));
else
prod.Supplier = sup.First();
db.Insert(prod);
}
}
}
public static void AddEmployee(string lastName, string[] territories, string firstName = "", string title = "")
{
using (DbNorthwind db = new DbNorthwind())
{
Employee emp = new Employee()
{
LastName = lastName,
FirstName = firstName,
Title = title,
BirthDate = DateTime.Now,
HireDate = DateTime.Now
};
emp.EmployeeID = Convert.ToInt32(db.InsertWithIdentity(emp));
foreach (string terr in territories)
{
Territory territory = (from t in db.Territory
where t.TerritoryID == terr
select t).First();
EmployeeTerritory et = new EmployeeTerritory()
{
Employee = emp,
Territory = territory
};
}
}
}
public static IEnumerable<Product> Products()
{
using (DbNorthwind db = new DbNorthwind())
{
var q = from p in db.Product
select p;
return q.ToList();
}
}
public static IEnumerable<EmployeeShipper> GetEmployeeShipperCoworking()
{
using (DbNorthwind db = new DbNorthwind())
{
var q = from o in db.Order
select new EmployeeShipper()
{
Employee = o.Employee,
Shipper = o.Shipper
};
return q.ToList();
}
}
public static IEnumerable<EmployeeRegionStat> GetEmployeeRegionStatistic()
{
using (DbNorthwind db = new DbNorthwind())
{
var q = from e in db.Employee
join et in db.EmployeeTerritory on e.EmployeeID equals et.Employee.EmployeeID
join t in db.Territory on et.Territory.TerritoryID equals t.TerritoryID
join r in db.Region on t.Region.RegionID equals r.RegionID
group e by r.RegionDescription into grp
select new EmployeeRegionStat()
{
RegionDescription = grp.Key,
EmployeeCount = grp.Count()
};
return q.ToList();
}
}
public static IEnumerable<EmployeeRegion> GetEmployeeRegionInformation()
{
using (DbNorthwind db = new DbNorthwind())
{
var q = from e in db.Employee
join et in db.EmployeeTerritory on e.EmployeeID equals et.Employee.EmployeeID
join t in db.Territory on et.Territory.TerritoryID equals t.TerritoryID
join r in db.Region on t.Region.RegionID equals r.RegionID
select new EmployeeRegion()
{
LastName = e.LastName,
FirstName = e.FirstName,
RegionDescription = r.RegionDescription
};
return q.ToList();
}
}
public static void ReplaceByProduct(Product newProduct)
{
using (DbNorthwind db = new DbNorthwind())
{
var prod = from p in db.Product
where p.ProductID == newProduct.ProductID
select p;
if (prod.Count() == 0)
newProduct.ProductID = Convert.ToInt32(db.InsertWithIdentity(newProduct));
var q = (from o in db.Order
where o.ShippedDate == null
select o).ToList();
foreach (Order order in q)
{
OrderDetail orderDetail = (from od in db.OrderDetail
where od.Order.OrderID == order.OrderID
select od).First();
orderDetail.Product = newProduct;
db.Update(orderDetail);
}
}
}
public static void UpdateCategory(Product[] products, Category newCategory)
{
using (DbNorthwind db = new DbNorthwind())
{
foreach (Product prod in products)
{
prod.Category = newCategory;
db.Update(prod);
}
}
}
