public ActionResult DeleteConfirmed(int id)
{
SetForeignKeysToNull(id);
OPSystem oPSystem = db.OperatingSystems.Find(id);
db.OperatingSystems.Remove(oPSystem);
db.SaveChanges();
TempData["OPSystemStatusMessage"] = "Operating system has been deleted successfully!";
return(RedirectToAction("Index"));
}
// GET: OPSystems/Edit/5
public ActionResult Edit(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
OPSystem oPSystem = db.OperatingSystems.Find(id);
if (oPSystem == null)
{
return(HttpNotFound());
}
return(View(oPSystem));
}
public ActionResult Edit([Bind(Include = "OPSystemId,OpSystemName,Description")] OPSystem oPSystem)
{
if (ModelState.IsValid)
{
if (CanUpdateOPSystem(oPSystem))
{
db.Entry(oPSystem).State = EntityState.Modified;
db.SaveChanges();
TempData["OPSystemStatusMessage"] = "Operating system has been updated successfully!";
return(RedirectToAction("Index"));
}
DisplayOPSystemExistsMessage(oPSystem);
}
return(View(oPSystem));
}
public ActionResult Create([Bind(Include = "OPSystemId,OpSystemName,Description")] OPSystem oPSystem)
{
if (ModelState.IsValid)
{
if (CanAddOPSystem(oPSystem.OpSystemName))
{
db.OperatingSystems.Add(oPSystem);
db.SaveChanges();
TempData["OPSystemStatusMessage"] = "Operating system has been added successfully!";
return(RedirectToAction("Index"));
}
DisplayOPSystemExistsMessage(oPSystem);
}
return(View(oPSystem));
}
private void DisplayOPSystemExistsMessage(OPSystem o)
{
ModelState.AddModelError("OpSystemName", $"Model {o.OpSystemName} already exists please choose another name.");
}
private bool CanUpdateOPSystem(OPSystem opS)
{
var query = db.OperatingSystems.Where(o => o.OPSystemId != opS.OPSystemId).Any(o => o.OpSystemName == opS.OpSystemName);
return(!query);
}
