[HttpPost]
public ActionResult Edit(FormCollection form)
{
// Get movie to update
var id = Int32.Parse(form["id_foto"]);
var fotoToAdd = _db.foto.First(m => m.id_foto == id);
// Deserialize (Include white list!)
TryUpdateModel(fotoToAdd, new string[] { "descricao" }, form.ToValueProvider());
//Here I try to change my foreign key, but i get this exception: "The property 'id_album' part of the key information of the object and can not be changed."
fotoToAdd.id_album = Convert.ToInt32(form["id_album"]);
//file upload
if (Request.Files.Count > 0)
{
int tamanho = (int)Request.Files[0].InputStream.Length;
byte[] arq = new byte[tamanho];
Request.Files[0].InputStream.Read(arq, 0, tamanho);
byte[] arqUp = arq;
fotoToAdd.imagem = arqUp;
}
//Validation
if (String.IsNullOrEmpty(fotoToAdd.descricao))
ModelState.AddModelError("Descrição", "Ops... campo obrigatório");
if (String.IsNullOrEmpty(fotoToAdd.id_album.ToString()))
ModelState.AddModelError("Album", "Ops... campo obrigatório");
if (fotoToAdd.imagem == null)
ModelState.AddModelError("Foto", "Ops... campo obrigatório");
//If success, Update
if (ModelState.IsValid)
{
_db.SaveChanges();
return RedirectToAction("Index");
}
//Else, return view
return View(fotoToAdd);
}
//Here I try to change my foreign key, but i get this exception: "The property 'id_album' part of the key information of the object and can not be changed."
fotoToAdd.id_album = Convert.ToInt32(form["id_album"]);
I have been researching how to do this, but am having difficulty, how do I make this update operation
