AJAX error does not return jqXHR.responseText.modelState when using custom dll

Question

I am using asp.net webapi controller and in my project I have a dll that I created. A dll is used to check if the person that the user enters exists.

Here is my controller method:

// POST: api/EventsAPI [ResponseType(typeof(Event))] public IHttpActionResult PostEvent(Event @event) { if (!ModelState.IsValid) { return BadRequest(ModelState); } if (@event.DateEndOfEvent < @event.DateOfEvent) // successfully returns error.modelState (in view code) { ModelState.AddModelError("DateEndOfEvent", "End Date Cannot Be Before Start Date!"); return BadRequest(ModelState); } if (!EmpData.IsValid(@event.PersonWorkedOne)) // returns error.modelState as undefined (in view code) { ModelState.AddModelError("PersonWorkedOne", "This person does not exist!"); return BadRequest(ModelState); } if (!string.IsNullOrWhiteSpace(@event.PersonWorkedTwo)) { if (!EmpData.IsValid(@event.PersonWorkedTwo)) // returns error.modelState as undefined (in view code) { ModelState.AddModelError("PersonWorkedTwo", "This persondoes not exist!"); return BadRequest(ModelState); } } db.Event.Add(@event); db.SaveChanges(); return CreatedAtRoute("DefaultApi", new { id = @event.Id }, @event); } 

Now the two conditional statements above that have EmpData .. EmpData from my dll.

Here is the ajax code in my opinion:

 $("form").data("validator").settings.submitHandler = function(form) { $.ajax({ method: "POST", url: infoGetUrl, data: $("form").serialize(), success: function() { toastr.options = { onHidden: function () { window.location.href = newUrl; }, timeOut: 3000 } toastr.success("Event successfully created."); }, error: function (jqXHR, textStatus, errorThrown) { var status = capitalizeFirstLetter(textStatus); var error = $.parseJSON(jqXHR.responseText); var modelState = error.modelState; console.log(modelState); $.each(modelState, function (key, value) { var id = ""; if (key === "$id") { id = "#" + key.replace('$', '').substr(0, 1).toUpperCase() + key.substr(2); } else { id = "#" + key.replace('$', '').substr(0, 1).toUpperCase() + key.substr(1); var status = capitalizeFirstLetter(textStatus); console.log(key); toastr.error(status + " - " + modelState[key]); } var input = $(id); console.log(id); // result is #id if (input) { // if element exists input.addClass('input-validation-error'); } }); } }); } 

Now in the controller, when I purposefully test to get an error message indicating the end date before the start date, I get error.modelState . But when I purposefully check for an error message saying that the person does not exist ... I do not get error.modelState .. which returns as undefined .

Is ModelState returned when using a custom DLL?

Any help is appreciated.

Answer 1

I was able to figure this out with the help of Addison. I edited my dll file to return only the bool object.

Initially, if what I tested in IsValid was something other than true, then I would have thrown an exception that caused this error.

So, we will select an exception from the part and just return either true or false.

Original

 public static bool IsValid(string person) { bool empExists = lstAllEmps.Any(x => x.IDNumber == person); if (empExists) { return empExists; } else { var exceptionMessage = string.Format("The person, {0}, does not exist!", person); throw new ArgumentException(exceptionMessage, person); } } 

New

 public static bool IsValid(string person) { bool empExists = lstAllEmps.Any(x => x.IDNum == person); return empExists; }