c# - MVC HandlerError attribute isn't redirecting to error View on Exception -

question background:

i have simple 'contact form' on page. user needs supply name, email message subject , actual message itself.

i'm trying implement 'error' view display during errors on mailing process such incorrect email format uer supplys.

the issue:

i'm using mvc handleerror attribute on home controller, page not being shown when error thrown.

code: contact form uses ajax submit request action method on home controller:

@using (ajax.beginform("sendfmfcmail", "home", new ajaxoptions { updatetargetid = "result", onbegin = "loadingspinner", onsuccess = "messagesent", onfailure = "failedmail" }))         {             @html.validationsummary(true)              <div id="result"></div>              <div class="row">                 <div class="col-lg-12">                     <div class="form-group">                         <div class="row">                             <div class="col-md-6 form-group">                                 @html.textboxfor(m => m.name, new { @class = " form-control spanwidth", placeholder = "name", id = "name" })                                 @html.validationmessagefor(model => model.name)                                 @*<input class="form-control spanwidth" id="name" placeholder="name">*@                             </div>                             <div class="col-md-6 form-group">                                 @html.textboxfor(m => m.email, new { @class = "form-control spanwidth", placeholder = "email", id = "email" })                                 @html.validationmessagefor(model => model.email)                             </div>                         </div>                         <div class="row">                             <div class="col-sm-12 form-group">                                 @html.textboxfor(m => m.subject, new { @class = "form-control spanwidth", placeholder = "subject", id = "subject" })                                 @html.validationmessagefor(model => model.subject)                             </div>                         </div>                         <div class="row">                             <div class="col-sm-12 form-group">                                 @html.textareafor(m => m.message, new { @class = "form-control spanheight spanwidth", placeholder = "message", rows = 15, id = "message" })                                 @html.validationmessagefor(model => model.message)                             </div>                         </div>                         <div class="row">                             <div class="col-sm-12 form-group">                                 <input type="submit" class="btn btn-primary btn-block spanwidth" value="send message" />                             </div>                         </div>                     </div>                 </div>             </div> 

the error.cshtml view in projects shared folder.

i have made sure web.config has customerrors turned on:

 <customerrors mode="on" /> 

this filterconfig.cs:

public static void registerglobalfilters(globalfiltercollection filters)     {         filters.add(new handleerrorattribute());     } 

in homecontroller have tried setting general exception handler @ top of class:

[handleerror(view = "fmfcerror")] public class homecontroller : controller {    //code. } 

and have tried setting on action method, not work:

note: have set explicit exception type of smtpexception i'm expecting fail when email sent invalid email address;

[handleerror(exceptiontype = typeof(smtpexception), view = "fmfcerror")] public actionresult sendfmfcmail(contact contactdetails) {    var emailhandler = new emailhandler();      try     {         emailhandler.sendmail(contactdetails);     }     catch(smtpexception ex)     {         throw ex;     }     return json(new { messagestatus = "success" }); } 

this sendmail method:

public void sendmail(contact emailmessage) {     string selleremail = webconfigurationmanager.appsettings["selleremail"];      mailaddress = new mailaddress(emailmessage.email, emailmessage.name);     mailaddress = new mailaddress(selleremail);     mailmessage mail = new mailmessage(from, to);      mail.subject = emailmessage.subject;     mail.body = emailmessage.message;      smtpclient client = new smtpclient()     {         host = "smtp.gmail.com",         port = 587,         enablessl = true,         deliverymethod = smtpdeliverymethod.network,         usedefaultcredentials = false,         credentials = new networkcredential(from.address, webconfigurationmanager.appsettings["selleremailpassword"])     };      client.send(mail); } 

can see i'm going wrong?

you cannot redirect via ajax post. can send url frontend want redirect browser , use js navigate there.

backend - home controller

[httppost] public actionresult gotomethodname() {       return json(url.action("index", "methodname"));    } 

views js - simple code assumes redirect on exception or success, more complex logic handling can written depending on how handle success, fix redirect on exception caught needs.

    $.ajax({         type: "post",         url: "http://localhost/gotomethodname",         datatype: 'json',         crossdomain: true,         success: function(data){             window.location.href = data;         }     });