public async Task<ActionResult> EditDepartment(int? id, byte[] rowVersion)
{
if (!id.HasValue)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
var departmentToUpdate = await _universityContext.Departments.FindAsync(id);
var includeProperties = new[] { "DepartmentID", "Name", "Budget", "StartDate", "InstructorID", "RowVersion" };
if (departmentToUpdate == null)
{
departmentToUpdate = new Department();
TryUpdateModel(departmentToUpdate, includeProperties);
ModelState.AddModelError(string.Empty, "Unable to save change the Department has already been deleted by another user.");
}
else if (TryUpdateModel(departmentToUpdate, includeProperties))
{
try
{
_universityContext.Entry(departmentToUpdate).OriginalValues["RowVersion"] = rowVersion;
await _universityContext.SaveChangesAsync();
return RedirectToAction("Index");
}
catch (DbUpdateConcurrencyException ex)
{
var entry = ex.Entries.Single();
var clientValues = (Department)entry.Entity;
var databaseEntry = entry.GetDatabaseValues();
if (databaseEntry == null)
{
ModelState.AddModelError(string.Empty, "Unable to save change the Department has already been deleted by another user.");
}
else
{
var databaseValues = (Department)databaseEntry.ToObject();
if (databaseValues.Name != clientValues.Name)
{
ModelState.AddModelError("Name", "Current value: " + databaseValues.Name);
}
ModelState.AddModelError(string.Empty, "The record was already edit by some other user");
departmentToUpdate.RowVersion = databaseValues.RowVersion;
}
}
catch (RetryLimitExceededException)
{
ModelState.AddModelError("", "Something went wrong.");
}
}
ViewBag.InstructorID = new SelectList(_universityContext.Instructors, "ID", "FullName", departmentToUpdate.InstructorID);
return View(departmentToUpdate);
}
public async Task<ActionResult> DeleteConfirmed(Department department)
{
try
{
_universityContext.Entry(department).State = EntityState.Deleted;
await _universityContext.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
return RedirectToAction("Delete", new {concurrencyError = true, id = department.DepartmentID});
}
catch (DataException)
{
ModelState.AddModelError(string.Empty, "Unable to delete");
}
return RedirectToAction("Index");
}
