public ActionResult Products_Create([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ProductViewModel> products)
{
// Will keep the inserted entitites here. Used to return the result later.
var entities = new List<Product>();
if (ModelState.IsValid)
{
using (var northwind = new NorthwindEntities())
{
foreach (var product in products)
{
// Create a new Product entity and set its properties from the posted ProductViewModel
var entity = new Product
{
ProductName = product.ProductName,
UnitsInStock = product.UnitsInStock
};
// Add the entity
northwind.Products.Add(entity);
// Store the entity for later use
entities.Add(entity);
}
// Insert the entities in the database
northwind.SaveChanges();
}
}
// Return the inserted entities. The grid needs the generated ProductID. Also return any validation errors.
return Json(entities.ToDataSourceResult(request, ModelState, product => new ProductViewModel
{
ProductID = product.ProductID,
ProductName = product.ProductName,
UnitsInStock = product.UnitsInStock
}));
}
public ActionResult Products_Update([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ProductViewModel> products)
{
// Will keep the updated entitites here. Used to return the result later.
var entities = new List<Product>();
if (ModelState.IsValid)
{
using (var northwind = new NorthwindEntities())
{
foreach (var product in products)
{
// Create a new Product entity and set its properties from the posted ProductViewModel
var entity = new Product
{
ProductID = product.ProductID,
ProductName = product.ProductName,
UnitsInStock = product.UnitsInStock
};
// Store the entity for later use
entities.Add(entity);
// Attach the entity
northwind.Products.Attach(entity);
// Change its state to Modified so Entity Framework can update the existing product instead of creating a new one
northwind.Entry(entity).State = EntityState.Modified;
// Or use ObjectStateManager if using a previous version of Entity Framework
// northwind.ObjectStateManager.ChangeObjectState(entity, EntityState.Modified);
}
// Update the entities in the database
northwind.SaveChanges();
}
}
// Return the updated entities. Also return any validation errors.
return Json(entities.ToDataSourceResult(request, ModelState, product => new ProductViewModel
{
ProductID = product.ProductID,
ProductName = product.ProductName,
UnitsInStock = product.UnitsInStock
}));
}
public ActionResult Products_Destroy([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ProductViewModel> products)
{
// Will keep the destroyed entitites here. Used to return the result later.
var entities = new List<Product>();
if (ModelState.IsValid)
{
using (var northwind = new NorthwindEntities())
{
foreach (var product in products)
{
// Create a new Product entity and set its properties from the posted ProductViewModel
var entity = new Product
{
ProductID = product.ProductID,
ProductName = product.ProductName,
UnitsInStock = product.UnitsInStock
};
// Store the entity for later use
entities.Add(entity);
// Attach the entity
northwind.Products.Attach(entity);
// Delete the entity
northwind.Products.Remove(entity);
// Or use DeleteObject if using a previous versoin of Entity Framework
// northwind.Products.DeleteObject(entity);
}
// Delete the entity in the database
northwind.SaveChanges();
}
}
// Return the destroyed entities. Also return any validation errors.
return Json(entities.ToDataSourceResult(request, ModelState, product => new ProductViewModel
{
ProductID = product.ProductID,
ProductName = product.ProductName,
UnitsInStock = product.UnitsInStock
}));
}
