//Problem 08
public static string GetUsersWithProducts(ProductShopContext context)
{
var users = context.Users
.ToList()
.Where(u => u.ProductsSold.Any(p => p.Buyer != null))
.OrderByDescending(u => u.ProductsSold.Count(p => p.Buyer != null))
.Select(u => new ExportUserDto()
{
FirstName = u.FirstName,
LastName = u.LastName,
Age = u.Age,
SoldProducts = new SoldProductsDto()
{
Count = u.ProductsSold.Count(p => p.Buyer != null),
Products = u.ProductsSold
.ToList()
.Where(p => p.Buyer != null)
.Select(p => new ProductDto()
{
Name = p.Name,
Price = p.Price
})
.ToList()
}
})
//.OrderByDescending(u => u.soldProducts.count)
.ToList();
var resultObj = new UserWithProductsDto()
{
Count = users.Count,
Users = users
};
var result = JsonConvert.SerializeObject(resultObj, new JsonSerializerSettings
{
Formatting = Formatting.Indented,
NullValueHandling = NullValueHandling.Ignore
});
return(result);
}
public string ExportSoldProducts()
{
var users = context.Users
.Include(u => u.ProductsSold)
.Where(u => u.ProductsSold.Any())
.OrderBy(u => u.LastName)
.ThenBy(u => u.FirstName)
.ToArray();
var userDtos = new UserWithProductsDto[users.Length];
for (var i = 0; i < users.Length; i++)
{
var user = users[i];
var soldProducts = user.ProductsSold
.AsQueryable()
.ProjectTo <SoldProductDto>()
.ToArray();
userDtos[i] = new UserWithProductsDto
{
FirstName = user.FirstName,
LastName = user.LastName,
SoldProducts = soldProducts
};
}
var sb = new StringBuilder();
var serializer = new XmlSerializer(userDtos.GetType(), new XmlRootAttribute("users"));
serializer.Serialize(new StringWriter(sb), userDtos, new XmlSerializerNamespaces(new[] { XmlQualifiedName.Empty }));
return(sb.ToString());
}
