public ActionResult Destroy(IEnumerable<ProductViewModel> products)
{
using (var northwind = new NorthwindEntities())
{
//Iterate all destroyed products which are posted by the Kendo Grid
foreach (var productViewModel in products)
{
// Create a new Product entity and set its properties from productViewModel
var product = new Product
{
ProductID = (int)productViewModel.ProductID,
};
// Attach the entity
northwind.Products.Attach(product);
// Delete the entity
northwind.Products.DeleteObject(product);
}
// Delete the products from the database
northwind.SaveChanges();
//Return emtpy result
return Json(null);
}
}
public ActionResult Create(IEnumerable<ProductViewModel> products)
{
var result = new List<Product>();
using (var northwind = new NorthwindEntities())
{
//Iterate all created products which are posted by the Kendo Grid
foreach (var productViewModel in products)
{
// Create a new Product entity and set its properties from productViewModel
var product = new Product
{
ProductName = productViewModel.ProductName,
UnitPrice = productViewModel.UnitPrice,
UnitsInStock = productViewModel.UnitsInStock,
Discontinued = productViewModel.Discontinued
};
// store the product in the result
result.Add(product);
// Add the entity
northwind.Products.AddObject(product);
}
// Insert all created products to the database
northwind.SaveChanges();
// Return the inserted products - the Kendo Grid needs their ProductID which is generated by SQL server during insertion
return Json(result.Select(p => new ProductViewModel
{
ProductID = p.ProductID,
ProductName = p.ProductName,
UnitPrice = p.UnitPrice,
UnitsInStock = p.UnitsInStock,
Discontinued = p.Discontinued
})
.ToList());
}
}
public ActionResult Update(IEnumerable<ProductViewModel> products)
{
using (var northwind = new NorthwindEntities())
{
//Iterate all updated products which are posted by the Kendo Grid
foreach (var productViewModel in products)
{
// Create a new Product entity and set its properties from productViewModel
var product = new Product
{
ProductID = (int)productViewModel.ProductID,
ProductName = productViewModel.ProductName,
UnitPrice = productViewModel.UnitPrice,
UnitsInStock = productViewModel.UnitsInStock,
Discontinued = productViewModel.Discontinued
};
// Attach the entity
northwind.Products.Attach(product);
// Change its state to Modified so Entity Framework can update the existing product instead of creating a new one
northwind.ObjectStateManager.ChangeObjectState(product, EntityState.Modified);
}
// Save all updated products to the database
northwind.SaveChanges();
//Return emtpy result
return Json(null);
}
}
public ActionResult Read()
{
using (var northwind = new NorthwindEntities())
{
var products = northwind.Products
// Use a view model to avoid serializing internal Entity Framework properties as JSON
.Select(p => new ProductViewModel
{
ProductID = p.ProductID,
ProductName = p.ProductName,
UnitPrice = p.UnitPrice,
UnitsInStock = p.UnitsInStock,
Discontinued = p.Discontinued
})
.ToList();
return Json(products);
}
}