// GET: Customers/Edit/5
public ActionResult Edit(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
Customer customer = db.Customers.Find(id);
if (customer == null)
{
return(HttpNotFound());
}
else
{
CustomerControllerViewDataTransferModel ReturnToIndex = new CustomerControllerViewDataTransferModel();
ReturnToIndex.DbCustomerSet = db.Customers.ToList();
ReturnToIndex.ActionState = (int)ActionStates.EditGet;
ReturnToIndex.TransferExtraCustomer = customer;
return(View("Index", ReturnToIndex));
// Compare different View methods:
// (1)when using $("#EditModal").modal() to open modal, return to View("Index").
// when using data-target=... data-toggle=.. it is not good, because the View(Index) will show up on modal webpage
// (2) return View(customer); wrong, because it equals to View("Edit",customer)- "Edit" is not a correct url
// (3) when using data-target=... data-toggle=.. it is good, because the correct View(Edit/id) will show up on modal webpage
// but data transfer to the "Edit.cshtml", not the index page. Thus the textbox in modal is empty.
// return View("Edit/"+ OldId, customer); // OK, but data not return to the Index page
}
}
[ValidateAntiForgeryToken] // Avoid CSRF: Cross Site Request Forgery
public ActionResult Create([Bind(Include = "Id,Name,Address")] Customer customer)
{ // data validation according to Model data annotation
if (ModelState.IsValid)
{
db.Customers.Add(customer);
db.SaveChanges();
return(RedirectToAction("Index"));
}
else
{
// return to view Index, data is combined with...
// original data db.Customers, and item "customer"...
// i.e., the new inputed one().
// because the new inputed item is not valid, give this item a special ID = -1
// customer.Id = -1;
CustomerControllerViewDataTransferModel ReturnToIndex = new CustomerControllerViewDataTransferModel();
ReturnToIndex.DbCustomerSet = db.Customers.ToList();
ReturnToIndex.ActionState = (int)ActionStates.CreateInputInvalid;
ReturnToIndex.TransferExtraCustomer = customer;
return(View("Index", ReturnToIndex));
// After receive this ReturnToIndex, the Index.cshtml will proceess this variable,...
// according to .TransferExtraCustomer & .ActionState, copy ExtraCustomer to partial view:...
// Create page, then list .DbCustomerSet items in the table on Index page
}
}
// GET: Customers/Delete/5
public ActionResult Delete(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
else
{
Customer customer = db.Customers.Find(id);
if (customer == null)
{
return(HttpNotFound());
}
else
{
CustomerControllerViewDataTransferModel ReturnToIndex = new CustomerControllerViewDataTransferModel();
ReturnToIndex.DbCustomerSet = db.Customers.ToList();
ReturnToIndex.TransferExtraCustomer = customer;
if (customer.ProductSolds.Count == 0)
{
ReturnToIndex.ActionState = (int)ActionStates.DeleteGet;
}
else
{ // Count > 0, Delete Get Foreign Key Constraint:
// Customer is used in ProductSold recods, thus it can not be deleted
ReturnToIndex.ActionState = (int)ActionStates.DeleteGetFKConstraint;
}
// different ways of View V.S. Openning Modal analysis: see comment in GET: Customers/Edit/5
return(View("Index", ReturnToIndex));
}
}
}
// GET: Customers
public ActionResult Index()
{
CustomerControllerViewDataTransferModel ReturnToIndex = new CustomerControllerViewDataTransferModel();
ReturnToIndex.DbCustomerSet = db.Customers.ToList();
ReturnToIndex.ActionState = (int)ActionStates.IndexGet;
ReturnToIndex.TransferExtraCustomer = null;
return(View("Index", ReturnToIndex));
}
// GET: Customers/Create
public ActionResult Create()
{
CustomerControllerViewDataTransferModel ReturnToIndex = new CustomerControllerViewDataTransferModel();
ReturnToIndex.DbCustomerSet = db.Customers.ToList();
ReturnToIndex.ActionState = (int)ActionStates.CreateGet;
ReturnToIndex.TransferExtraCustomer = new Customer {
Name = "", Address = ""
};
return(View("Index", ReturnToIndex));
}
public ActionResult Edit([Bind(Include = "Id,Name,Address")] Customer customer)
{// data validation according to Model data annotation
if (ModelState.IsValid)
{
db.Entry(customer).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
else
{
CustomerControllerViewDataTransferModel ReturnToIndex = new CustomerControllerViewDataTransferModel();
ReturnToIndex.DbCustomerSet = db.Customers.ToList();
ReturnToIndex.ActionState = (int)ActionStates.EditInputInvalid;
ReturnToIndex.TransferExtraCustomer = customer;
return(View("Index", ReturnToIndex));
}
}