public object Edit([Bind(Prefix = "")]Preference preference, string course,
string prof, string CourseList)
{
ViewData["Title"] = "Edit Preference";
ViewData["Message"] = "Edit a Preference";
// redisplay form immediately if there are input format errors
if (!ViewData.ModelState.IsValid)
return View(preference);
int profId;
try {
profId = Convert.ToInt32(prof);
ViewData["id"] = prof;
} catch (Exception) { //not an integer
return RedirectToAction("Index", "Professor");
}
int courseId;
try {
courseId = Convert.ToInt32(course);
} catch (Exception) { //not an integer
return this.RedirectToAction(c => c.Show(prof));
}
try {
var prefProv = new PreferencesProvider();
Preference pref = prefProv.GetPreferenceByProfIdAndCourseId(profId, courseId);
if (pref != null) {
Course cour = (new CourseProvider()).GetCourseByID(Convert.ToInt32(CourseList));
pref.Id.Course = cour;
pref.Weight = preference.Weight;
prefProv.UpdatePreference(pref);
return View("Saved");
}
return this.RedirectToAction(c => c.Show(prof));
} catch (RuleViolationException vex) {
ViewData.ModelState.CopyValidationExceptions(vex);
PrepareCoursesList(preference);
return View("Edit", preference);
} catch (Exception err) {
ViewData.ModelState.CopyValidationExceptions(err, "preference");
PrepareCoursesList(preference);
return View("Edit", preference);
}
}
public ActionResult Delete(string prof, string course)
{
int profId, courseId;
try {
profId = Convert.ToInt32(prof);
ViewData["id"] = prof;
} catch (Exception) //not an integer
{
return RedirectToAction("Index", "Professor");
}
try {
courseId = Convert.ToInt32(course);
} catch (Exception) //not an integer
{
return this.RedirectToAction(c => c.Show(prof));
}
try {
var prefProvider = new PreferencesProvider();
Preference preference = prefProvider.GetPreferenceByProfIdAndCourseId(profId, courseId);
if (preference != null) {
prefProvider.DeletePreference(preference);
return View("Deleted");
}
return this.RedirectToAction(c => c.Show(prof));
} catch (Exception err) {
if (err.InnerException != null &&
err.InnerException.Message.Contains(
"The DELETE statement conflicted with the REFERENCE constraint")) {
ViewData["ErrorMessage"] =
"Course could not be deleted.. there are assoiciated data.. cannot delete";
} else {
ViewData["ErrorMessage"] = "Preference Could not be deleted.. there is a problem";
}
return View("NotDeleted");
}
}
