static void Main(string[] args)
{
BinaryFormatter binarySerializer = new BinaryFormatter();
XmlSerializer xmlSerializer = new XmlSerializer(typeof(List <Category>));
Newtonsoft.Json.JsonSerializer jsonSerializer = new Newtonsoft.Json.JsonSerializer();
using (var db = new DbNorthwind())
{
// Eager loading
List <Category> categories = db.Categories.Include(c => c.Products).ToList();
using (FileStream file = File.Create("CategoriesAndProducts.dat"))
{
binarySerializer.Serialize(file, categories);
}
using (FileStream file = File.Create("CategoriesAndProducts.xml"))
{
xmlSerializer.Serialize(file, categories);
}
using (StreamWriter file = File.CreateText(Combine(CurrentDirectory, "CategoriesAndProducts.json")))
{
jsonSerializer.Serialize(file, categories);
}
}
// Deserialed all formats to check
using (FileStream file = File.Open("CategoriesAndProducts.xml", FileMode.Open)){
var cats = xmlSerializer.Deserialize(file) as List <Category>;
foreach (var cat in cats)
{
WriteLine($"Category ID {cat.CategoryID}, category Name {cat.CategoryName}, {cat.Products.Count}");
}
}
using (FileStream file = File.Open("CategoriesAndProducts.dat", FileMode.Open)){
var cats = binarySerializer.Deserialize(file) as List <Category>;
foreach (var cat in cats)
{
WriteLine($"Category ID {cat.CategoryID}, category Name {cat.CategoryName}, {cat.Products.Count}");
}
}
using (StreamReader file = File.OpenText("CategoriesAndProducts.json"))
{
var cats = jsonSerializer.Deserialize(file, typeof(List <Category>)) as List <Category>;
foreach (var cat in cats)
{
WriteLine($"Category ID {cat.CategoryID}, category Name {cat.CategoryName}, {cat.Products.Count}");
}
}
}
static void PrintCustomersCompanyByCity(string city)
{
using (var db = new DbNorthwind()){
var queryCustomerName = from customer in db.Customers
where customer.City == city
orderby customer.City
select customer.CompanyName;
queryCustomerName.Distinct();
WriteLine("There are {0} customers in {1}:", queryCustomerName.Count(), city);
foreach (var company in queryCustomerName)
{
WriteLine(company);
}
}
}
static void PrintUniqueCustomerCities()
{
using (var db = new DbNorthwind()){
var queryCities = db.Customers
.OrderBy(customer => customer.City)
.Select(customer => customer.City)
.Distinct().ToArray();
int NumberOfCities = queryCities.Count();
WriteLine("Available {0} cities:", NumberOfCities);
for (int i = 0; i < NumberOfCities; i++)
{
if (i != NumberOfCities - 1)
{
Write("{0}, ", queryCities[i]);
}
else
{
WriteLine("{0} ", queryCities[i]);
}
}
}
}
