I am using an asp.net webapi controller, and in my project I have a dll that I built myself. The dll is being used to validate if the person that the user is typing in actually 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 is from my dll.
Here is the ajax code in my view:
$("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 the error message concering the end date being before the start date, I receive error.modelState. But when I purposefully test to get the error message saying that a person does not exist... I do not get error.modelState.. that returns as undefined.
Does returning ModelState not work when using custom DLL?
Any help is appreciated.
1 Answers
Answers 1
I was able to figure this out with the help of ADyson. I edited my DLL file to return just a bool object.
Originally if what I was checking in IsValid was anything other than true, then I would throw an exception which was causing this error.
So taking the exception part out and just returning either true or false worked.
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; } 
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