return error message with actionResult

Question

MVC App  client makes request to server  error happens  want to send the msg back to the client  Tried HttpStatusCodeResult but just returns a 404 with no message  I need the details of the error sent back to the client   public ActionResult GetPLUAndDeptInfo string authCode        try                 code everything works fine           catch  Exception ex                 Console WriteLine ex Message            return new HttpStatusCodeResult 404   Error in cloud - GetPLUInfo    ex Message

User · Answer

One approach would be to just use the ModelState   ModelState AddModelError      Error in cloud - GetPLUInfo    ex Message     and then on the view do something like this    Html ValidationSummary     where you want the errors to display  If there are no errors  it won t display  but if there are you ll get a section that lists all the errors

User · Answer

You need to return a view which has a friendly error message to the user  catch  Exception ex          to do  log error    return View  Error        You should not be showing the internal details of your exception like exception stacktrace etc  to the user  You should be logging the relevant information to your error log so that you can go through it and fix the issue   If your request is an ajax request  You may return a JSON response with a proper status flag which client can evaluate and do further actions   HttpPost  public ActionResult Create CustomerVM model      try          save customer     return Json new   status  success  message  customer created           catch Exception ex            to do  log error    return Json new   status  error  message  error creating customer              If you want to show the error in the form user submitted  You may use ModelState AddModelError method along with the Html helper methods like Html ValidationSummary etc to show the error to the user in the form he submitted

User · Answer

IN your view insert    Html ValidationMessage  Error     then in the controller after you use new in your model   var model   new yourmodel    try         catch Exception ex   ModelState AddModelError  Error   ex Message   return View model

User · Answer

Inside Controller Action you can access HttpContext Response  There you can set the response status as in the following listing    HttpPost  public ActionResult PostViaAjax         var body   Request BinaryRead Request TotalBytes        var result   Content JsonError new Dictionary lt string  string gt                    err    Some error             application json  charset utf-8        HttpContext Response StatusCode    int HttpStatusCode BadRequest      return result

[c#] return error message with actionResult

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