private static void getProductsNumberForCategory(ProdContext prodContext)
{
var query =
from c in prodContext.Categories
select new
{
CategoryID = c.CategoryID,
CategoryName = c.CategoryName,
ProductsNumber = c.Products.Count()
};
foreach (var category in query)
{
Console.WriteLine("{0}\t{1}\t{2}",
category.CategoryID,
category.CategoryName,
category.ProductsNumber);
}
}
private static void getProductsEagerLoading(ProdContext prodConext)
{
var query =
prodConext.Categories
.Include(c => c.Products)
.ToList();
foreach (var category in query)
{
Console.Write("{0}\t{1}\n",
category.CategoryID,
category.CategoryName);
foreach (var product in category.Products)
{
Console.WriteLine("\t{0}\t{1}",
product.ProductID,
product.Name);
}
}
}
private static void getCategoriesAndProductsJoin(ProdContext prodContext)
{
var query =
from c in prodContext.Categories
join p in prodContext.Products
on c.CategoryID equals p.CategoryID
select new
{
CategoryID = c.CategoryID,
CategoryName = c.CategoryName,
ProductID = p.ProductID,
ProductName = p.Name
};
foreach (var product in query)
{
Console.WriteLine("{0}\t{1}\t{2}\t{3}",
product.CategoryID,
product.CategoryName,
product.ProductID,
product.ProductName);
}
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
_context = new ProdContext();
}
