static void GenerateXmlWithData(string path, ShopEntities ctx)
{
var users = ctx.Users
.Where(u => u.ProductsSold.Count() >= 1)
.OrderByDescending(u => u.ProductsSold.Count())
.ThenBy(u => u.LastName)
.Select(u => new
{
FirstName = u.FirstName,
LastName = u.LastName,
Age = u.Age,
SoldProducts = u.ProductsSold
.Select(p => new
{
Name = p.Name,
Price = p.Price
})
}).ToList();
int usersCount = users.Count();
var doc = new XDocument();
var usersElement = new XElement("users");
XAttribute attribute = new XAttribute("count", usersCount);
usersElement.Add(attribute);
foreach(var user in users)
{
XElement xmlUser = new XElement("user");
if (user.FirstName != null)
xmlUser.Add(new XAttribute("first-name", user.FirstName));
xmlUser.Add(new XAttribute("last-name", user.LastName));
if (user.Age != null)
xmlUser.Add(new XAttribute("age", user.Age));
var soldProducts = new XElement("sold-products");
soldProducts.Add(new XAttribute("count", user.SoldProducts.Count()));
if(user.SoldProducts.Count() != 0)
foreach (var product in user.SoldProducts)
{
XElement pr = new XElement("product",
new XAttribute("name", product.Name),
new XAttribute("price", product.Price));
soldProducts.Add(pr);
}
xmlUser.Add(soldProducts);
usersElement.Add(xmlUser);
}
doc.Add(usersElement);
doc.Save(path);
}
private static void ProductsInRange()
{
var db = new ShopEntities();
var products = db.Products.Where(p => p.Price >= 500 && p.Price <= 1000 && p.BuyerId == null)
.OrderBy(p => p.Price)
.Select(p => new
{
Product = p.Name,
p.Price,
SellerNames = p.Seller.FirstName + " " + p.Seller.LastName
});
var json = JsonConvert.SerializeObject(products.ToArray());
Console.WriteLine(json);
}
private static void SeedCategories()
{
var context = new ShopEntities();
using (StreamReader file = File.OpenText("../../../categories.json"))
{
Category[] categories = JsonConvert.DeserializeObject<Category[]>(file.ReadToEnd());
foreach (var category in categories)
{
context.Categories.AddOrUpdate(category);
}
context.SaveChanges();
}
}
private static void CategoriesByProductsCount()
{
var db = new ShopEntities();
var categories = from c in db.Categories
orderby c.Products.Count
select new
{
category = c.Name,
productsCount = c.Products.Count,
averagePrice = db.Products.AsEnumerable().Average(a => a.Price),
totalRevenue = db.Products.AsEnumerable().Sum(a => a.Price)
};
var json = JsonConvert.SerializeObject(categories.ToArray());
Console.WriteLine(json);
}
static void Main()
{
var ctx = new ShopEntities();
System.IO.Directory.CreateDirectory(folderPathAndName);
//Quey 1
var specificProducts = ctx.Products
.Where(p => p.Buyer == null && p.Price >= 500 && p.Price <= 1000)
.OrderBy(p => p.Price)
.Select(p => new
{
name = p.Name,
price = p.Price,
seller = p.Seller.FirstName + " " + p.Seller.LastName
});
var serializedProducts = JsonConvert.SerializeObject(specificProducts, Newtonsoft.Json.Formatting.Indented);
System.IO.File.WriteAllText(folderPathAndName + @"/products-in-range.json", serializedProducts);
//Query 2
var specificUsers = ctx.Users
.Where(u => u.ProductsSold.Count() >= 1)
.OrderBy(u => u.LastName)
.OrderBy(u => u.FirstName)
.Select(u => new
{
firstName = u.FirstName,
lastName = u.LastName,
soldProducts = u.ProductsSold
.Where(p => p.Buyer != null)
.Select(p => new
{
name = p.Name,
price = p.Price,
buyerFirstName = p.Buyer.FirstName,
buyerLastName = p.Buyer.LastName
})
});
var serializedUsers = JsonConvert.SerializeObject(specificUsers, Newtonsoft.Json.Formatting.Indented);
File.WriteAllText(folderPathAndName + @"/users-sold-products.json", serializedUsers);
//Query 3
var categories1 = ctx.Categories.ToArray();
var categories = ctx.Categories
.OrderByDescending(c => c.Products.Count())
.Select( c => new
{
category = c.Name,
productsCount = c.Products.Count(),
averagePrice = c.Products.Count() == 0 ? 0 : c.Products.Average(p => p.Price),
totalRevenue = c.Products.Count() == 0 ? 0 : c.Products.Sum(p => p.Price)
});
var serializedCategories = JsonConvert.SerializeObject(categories, Newtonsoft.Json.Formatting.Indented);
File.WriteAllText(folderPathAndName + @"/categories-by-products.json", serializedCategories);
//Query 4
GenerateXmlWithData(folderPathAndName + @"/users-and-products.xml", ctx);
}
private static void SeedProductCategories()
{
var context = new ShopEntities();
for (int i = 3; i < 47; i++)
{
Random rnd = new Random();
using (var dbContextTransaction4 = context.Database.BeginTransaction())
{
try
{
context.Database.ExecuteSqlCommand(
"INSERT INTO ProductCategories(Product_Id, Category_Id) VALUES (" + i + "," +
rnd.Next(1, 11) + ")");
context.SaveChanges();
dbContextTransaction4.Commit();
}
catch (Exception)
{
dbContextTransaction4.Rollback();
}
}
}
}
private static void UsersAndProducts()
{
var db = new ShopEntities();
var users = db.Users.Where(u => u.SoldProducts.Any()).Select(u => new
{
u.FirstName,
u.LastName,
u.Age,
products = u.SoldProducts.Select(p => new
{
p.Name,
p.Price
})
});
string fileName = "../../users.xml";
Encoding encoding = Encoding.GetEncoding("UTF-8");
using (XmlTextWriter writer = new XmlTextWriter(fileName, encoding))
{
writer.Formatting = Formatting.Indented;
writer.IndentChar = '\t';
writer.Indentation = 1;
writer.WriteStartDocument();
writer.WriteStartElement("users");
writer.WriteAttributeString("count", users.Count().ToString());
foreach (var user in users)
{
writer.WriteStartElement("user");
if (user.FirstName != null)
{
writer.WriteAttributeString("first-name", user.FirstName);
}
writer.WriteAttributeString("last-name", user.LastName);
if (user.Age != null)
{
writer.WriteAttributeString("age", user.Age.ToString());
}
writer.WriteStartElement("sold-products");
writer.WriteAttributeString("count", user.products.Count().ToString());
foreach (var product in user.products)
{
writer.WriteStartElement("product");
writer.WriteAttributeString("name", product.Name);
writer.WriteAttributeString("price", product.Price.ToString());
}
}
writer.WriteEndDocument();
}
Console.WriteLine("Document {0} created.", fileName);
}
private static void SuccessfullySoldProducts()
{
var db = new ShopEntities();
var sellers = from s in (db.Users.Where(u => u.SoldProducts.Any())
.Select(u => new
{
firstName = u.FirstName ?? "-",
lastName = u.LastName,
soldProducts = u.SoldProducts.Select(p => new
{
name = p.Name,
price = p.Price,
buyerFirstName = p.Buyer.FirstName ?? "-",
buyerLastName = p.Buyer.LastName
}).Where(p => p.buyerFirstName != null && p.buyerLastName != null)
}))
where s.soldProducts.Any()
orderby s.lastName
orderby s.firstName
select new
{
s.firstName,
s.lastName,
s.soldProducts
};
var json = JsonConvert.SerializeObject(sellers.ToArray());
Console.WriteLine(json);
}
private static void SeedUsers()
{
var context = new ShopEntities();
var path = "..\\..\\..\\users.xml";
var doc = XDocument.Load(path);
string json = JsonConvert.SerializeXNode(doc, Newtonsoft.Json.Formatting.Indented);
var jsonObj = JObject.Parse(json);
foreach (var u in jsonObj["users"]["user"])
{
string lname = u["@last-name"].ToString();
string fname = null;
if (u["@first-name"] != null)
{
fname = u["@first-name"].ToString();
}
if (!Object.ReferenceEquals(null, u["@age"]))
{
int age = int.Parse((u["@age"].ToString()));
using (var dbContextTransaction = context.Database.BeginTransaction())
{
try
{
context.Database.ExecuteSqlCommand(
"INSERT INTO Users(FirstName, LastName, Age) VALUES ('" + fname + "','" + lname + "'," +
age + ")");
context.SaveChanges();
dbContextTransaction.Commit();
}
catch (Exception)
{
dbContextTransaction.Rollback();
}
}
}
else
{
using (var dbContextTransaction2 = context.Database.BeginTransaction())
{
try
{
context.Database.ExecuteSqlCommand(
"INSERT INTO Users(FirstName, LastName) VALUES (" + fname + "," + lname + ")");
context.SaveChanges();
dbContextTransaction2.Commit();
}
catch (Exception)
{
dbContextTransaction2.Rollback();
}
}
}
}
}
private static void SeedProducts()
{
var context = new ShopEntities();
using (StreamReader file = File.OpenText("../../../products.json"))
{
Product[] products = JsonConvert.DeserializeObject<Product[]>(file.ReadToEnd());
Random rnd = new Random();
int buyer = rnd.Next(0, 50);
int seller = 46;
foreach (var product in products)
{
double price = Double.Parse((product.Price).ToString());
string name = product.Name.ToString();
if (buyer >= 3 && buyer <= 46)
{
using (var dbContextTransaction3 = context.Database.BeginTransaction())
{
try
{
context.Database.ExecuteSqlCommand(
"INSERT INTO Products(Name, Price, BuyerId, SellerId) VALUES ('" + name + "'," +
price + "," + buyer + "," + seller + ")");
context.SaveChanges();
dbContextTransaction3.Commit();
}
catch (Exception)
{
dbContextTransaction3.Rollback();
}
}
}
else
{
using (var dbContextTransaction5 = context.Database.BeginTransaction())
{
try
{
context.Database.ExecuteSqlCommand(
"INSERT INTO Products(Name, Price, SellerId) VALUES ('" + name + "'," +
price + "," + seller + ")");
context.SaveChanges();
dbContextTransaction5.Commit();
}
catch (Exception)
{
dbContextTransaction5.Rollback();
}
}
}
buyer = rnd.Next(0, 50);
seller--;
}
}
}
