private void BtnqueryEx9Click(object sender, RoutedEventArgs e)
{
//excercise 9 - Using A stored procedure
NORTHWNDEntities db = new NORTHWNDEntities();
var query = db.Customers_By_City("London");
dgCustomerEx4.ItemsSource = query.ToList();
}
private void BtnqueryEx2_Click(object sender, RoutedEventArgs e)
{
//excercise 2 - retrieves customer objects
NORTHWNDEntities db = new NORTHWNDEntities();
var query = from c in db.Customers
select c;
//lbxQuery.ItemSourced = query.ToList();
}
private void BtnqueryEx8Click(object sender, RoutedEventArgs e)
{
//excercise 8 - Deletes data
NORTHWNDEntities db = new NORTHWNDEntities();
var products = from p in db.Products
where p.ProductName.StartsWith("Kick")
select p;
db.Products.RemoveRange(products);
db.SaveChanges();
//ShowProducts(dgCustomerEx6);
//lbxQuery.ItemSourced = query.ToList();
}
private void BtnqueryEx6Click(object sender, RoutedEventArgs e)
{
//excercise 6 - Updates product info
NORTHWNDEntities db = new NORTHWNDEntities();
Product p1 = (db.Products
.Where(p => p.ProductName.StartsWith("Kick"))
.Select(p => p)).First();
p1.UnitPrice = 100m;
db.SaveChanges();
//ShowProducts(dgCustomerEx6);
//lbxQuery.ItemSourced = query.ToList();
}
private void BtnqueryEx5Click(object sender, RoutedEventArgs e)
{
//excercise 5 - inserts a product
NORTHWNDEntities db = new NORTHWNDEntities();
Product p = new Product()
{
ProductName = "Kickapoo",
UnitPrice = 12.49m,
CategoryID = 1
};
db.Products.Add(p);
db.SaveChanges();
//ShowProducts();
//lbxQuery.ItemSourced = query.ToList();
}
private void ShowProducts(DataGrid currentGrid)
{
NORTHWNDEntities db = new NORTHWNDEntities();
var query = from p in db.Products
where p.Category.CategoryName.Equals("Beverage")
orderby p.ProductID descending
select new
{
p.ProductID,
p.ProductName,
p.Category.CategoryName,
p.UnitPrice
};
currentGrid.ItemsSource = query.ToList();
}
private void BtnqueryEx4_Click(object sender, RoutedEventArgs e)
{
//excercise 4 - retrieves product information
NORTHWNDEntities db = new NORTHWNDEntities();
var query = from p in db.Products
where p.Category.CategoryName.Equals("Beverage")
orderby p.ProductID descending
select new
{
p.ProductID,
p.ProductName,
p.Category.CategoryName,
p.UnitPrice
};
//lbxQuery.ItemSourced = query.ToList();
}
private void BtnqueryEx7Click(object sender, RoutedEventArgs e)
{
//excercise 7 - Multiple update
NORTHWNDEntities db = new NORTHWNDEntities();
var products = from p in db.Products
where p.ProductName.StartsWith("Kick")
select p;
foreach (var item in products)
{
item.UnitPrice = 100m;
}
db.SaveChanges();
//ShowProducts(dgCustomerEx6);
//lbxQuery.ItemSourced = query.ToList();
}
private void BtnqueryEx3_Click(object sender, RoutedEventArgs e)
{
//excercise 3 - retrieves order information
NORTHWNDEntities db = new NORTHWNDEntities();
var query = from o in db.Orders
where o.Customer.City.Equals("London") ||
o.Customer.City.Equals("Paris") ||
o.Customer.Country.Equals("Usa")
orderby o.Customer.CompanyName
select new
{
CustomerName = o.Customer.CompanyName,
City = o.Customer.City,
Address = o.ShipAddress
};
//lbxQuery.ItemSourced = query.ToList();
}
