MVC3 JSON Ajax error

Question

I am trying to make an ajax sending data in JSON from a partial view. I get a System.ArgumentException: Invalid JSON primitive: undefined. When I evaluate the object in a browser data contains an int and two strings. Can anyone tell me what I am doing wrong?

Partial View

@model FTD.Models.FTDAccountExtended
@using (Html.BeginForm()) {
<fieldset>
<legend>Update Policy Number</legend>
@Html.HiddenFor(m => m.account.ftd_accountsid)
@Html.HiddenFor(m => m.OldPolicyNumber)
@Html.TextBoxFor(m => m.account.ftd_policyno)
<input type="button" value="update" id="update" />
</fieldset>
}

<script type="text/javascript">
 $(document).ready(function () {
     $("#update").click(function () {
         var myUrl = '@Url.Content("~/")' + '/Maintenance/UpdatePolicyNumber';
         var data = [{ 'ClientNumber': parseInt($("#account_ftd_accountsid").val()), 'OldPolicyNumber': $("#OldPolicyNumber").val(), 'NewPolicyNumber': $("#account_ftd_policyno").val()}];
         $.ajax({
             url: myUrl,
             type: 'POST',
             data: data,
             contentType: 'application/json; charset=utf-8',
             success: function (data) {
                 alert(data.message);
             },
             error: function (errMsg) {
                 alert("Error", errMsg);
             }
         });
     });
 });

The controller method is

public ActionResult UpdatePolicyNumber(int ClientNumber, string OldPolicyNumber, string NewPolicyNumber)
{
    var message = string.Format("UpdatePolicyNumber CN:{0} OP:{1} NP:{2}", ClientNumber, OldPolicyNumber, NewPolicyNumber);
    if (_log.IsDebugEnabled)
        _log.Debug(message);
    if (!string.IsNullOrEmpty(NewPolicyNumber) && ClientNumber > 0)
    {
        _entities = new CloseFTD_Entities();
        _entities.UpdatePolicyNumber(ClientNumber, OldPolicyNumber, NewPolicyNumber, User.Identity.Name);

     }
     return Json
        (
           new
           {
               message = message
           },
           JsonRequestBehavior.AllowGet
         );
}

stackoverflow.com/questions/9699749/… i hope that link can help you.. — viyancs
– viyancs, Commented Mar 16, 2012 at 9:37
Essentially I want to pass the entry parameters of the controller method [{ 'ClientNumber': 83688, 'OldPolicyNumber': "WWW4567", 'NewPolicyNumber': "WWW1234" }] — Cookie
– Cookie, Commented Mar 16, 2012 at 9:58
wheer you want to parsing that data? in server side or client side? — viyancs
– viyancs, Commented Mar 16, 2012 at 10:01

amythn04 · Accepted Answer · 2012-03-16 11:00:14Z

1

I would just try posting the the data as a java script object (as Marc mentioned above) and remove the content type attribute.

answered Mar 16, 2012 at 11:00

amythn04

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1 Comment

Cookie Over a year ago

Using Marcs change and removing the content type did it many thanks.

Michiel Cornille · Accepted Answer · 2012-03-16 10:53:05Z

1

 success: function (data) {
                 alert(data.success);
             },

shouldn't this be

 success: function (data) {
                 alert(data.message);
             },

answered Mar 16, 2012 at 10:53

Michiel Cornille

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1 Comment

Cookie Over a year ago

You quite right that is incorrect. However not actually triggering the controller, the error is in the data I am passing across.

Marc · Accepted Answer · 2012-03-16 10:56:20Z

1

Your problem is here

var data = [{ 'ClientNumber': parseInt($("#account_ftd_accountsid").val()), 'OldPolicyNumber': $("#OldPolicyNumber").val(), 'NewPolicyNumber': $("#account_ftd_policyno").val()}];

You are building an array - but your controller excepts the direct values, so just remove the [] brackets:

var data = { 'ClientNumber': parseInt($("#account_ftd_accountsid").val()), 'OldPolicyNumber': $("#OldPolicyNumber").val(), 'NewPolicyNumber': $("#account_ftd_policyno").val()};

That should work.

answered Mar 16, 2012 at 10:56

Marc

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1 Comment

Cookie Over a year ago

Tried removing the [] brackets, but still getting System.ArgumentException: Invalid JSON primitive: ClientNumber.

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