public ActionResult Create(Employee employee)
{
try
{
db.Employees.Add(employee);
// db.Configuration.ValidateOnSaveEnabled = false;
db.SaveChanges();
return RedirectToAction("Index");
}
catch (DbEntityValidationException ex)
{
var error = ex.EntityValidationErrors.First().ValidationErrors.First();
this.ModelState.AddModelError(error.PropertyName, error.ErrorMessage);
ViewBag.DepartmentId = new SelectList(
db.Departments, "DepartmentId", "Name", employee.DepartmentId);
return View();
}
}
public ActionResult Edit(Employee employee)
{
try
{
db.Entry(employee).State = EntityState.Modified;
// simulate database row being changed by another user
db.Database.ExecuteSqlCommand(
@"UPDATE Employees SET PhoneNumber = 9999, Username = '******' WHERE EmployeeId = @Id",
new SqlParameter("Id", 1));
// property values so we can set breakpoint and see what is going on
var emp1 = ((Employee)db.Entry(employee).CurrentValues.ToObject());
var emp2 = ((Employee)db.Entry(employee).OriginalValues.ToObject());
var emp3 = ((Employee)db.Entry(employee).GetDatabaseValues().ToObject());
db.SaveChanges();
return RedirectToAction("Index");
}
catch (DbUpdateConcurrencyException ex)
{
// note this will not resolve problem here as SQL statement runs every time!
this.ModelState.AddModelError(string.Empty, "employee data has been changed since you started editing");
db.Entry(employee).Reload(); // overwrites current values with database values, database wins
// property values so we can set breakpoint and see what is going on
var emp1 = ((Employee)db.Entry(employee).CurrentValues.ToObject());
var emp2 = ((Employee)db.Entry(employee).OriginalValues.ToObject());
var emp3 = ((Employee)db.Entry(employee).GetDatabaseValues().ToObject());
ViewBag.DepartmentId = new SelectList(db.Departments, "DepartmentId", "Name", employee.DepartmentId);
return View(employee); // note raw HTML inputs rather than HTML Helpers in view seems to prevent form caching
}
}
