Comments on: ASMX ScriptService mistake – Invalid JSON primitive

By: piyush

piyush — Thu, 22 Dec 2011 21:48:43 +0000

Yup, this was helpful and I was stuck with same error too.

One more thing I would like to add is –

My webservice had method like AddCustomer(Customer customer).

Assume Customer class has { Name, Address, City } properties, from javascript we need following type of json string.
{“customer”:{“Name”:”A”,”Address”:”123, test drive”,”City”:”Troy”}}

Please note that the parameter-name of the method has to be available in the json string.

By: Josh

Josh — Wed, 14 Dec 2011 20:13:33 +0000

Dave,

I think that I understand now, thanks to your post, what’s going on, and I have control over my own data being posted, but is there any way to wrap all data in quotes before sending? I don’t have any control over the many jquery libraries/plugins that I use, and they all seem to send without quotes, causing this Invalid JSON primitive.

I’ve read a number of your posts, including the one where you use ajaxSetup to set defaults for everything, I’m guessing something in there would be able to format the request correctly first.

By: Roj

Roj — Fri, 21 Oct 2011 20:35:00 +0000

This was exactly what I needed, thanks so much!!

By: Dilip

Dilip — Fri, 21 Oct 2011 03:58:51 +0000

Great clarification ! Hats off !

By: Matt

Matt — Thu, 13 Oct 2011 09:46:18 +0000

And thanks Dave for original article, great stuff

By: Matt

Matt — Thu, 13 Oct 2011 09:45:12 +0000

Thanks John,

Your final comment saved me from going mad, I was trying every variation of parameters and thought from previous comments that GET was not allowed even though UseHttpGet=true is there for all to see, I had simply missed enclosing quotes on a given string, for anyone else -

var getparameters = “searchstr=’” + searchtext + “‘&maxresults=” + showmaxresults + “&localservice=” + localcall;

$.ajax({
type: “GET”,
data: getparameters,
url: “http … your.asmx/ABC”,
contentType: “application/json; charset=utf-8″,
dataType: “json”,

… etc

By: miguel

miguel — Tue, 09 Aug 2011 03:22:59 +0000

you saved my ass!! thank for this most helpful explanation.
Miguel

By: Rafael M

Rafael M — Sun, 12 Jun 2011 13:41:13 +0000

Thank you so much, this error cost me like 6 hours…

By: chinvar

chinvar — Wed, 11 May 2011 19:50:37 +0000

Thanks a lot, it worked for me. But this is quite different; I was using var parameters = “{ccnum:”+ccnum+”}”; which did not worked; i just replaced double quotes by single and it worked. var parameters = ‘{ccnum:”+ccnum+”}’;

By: John

John — Wed, 11 May 2011 13:11:31 +0000

You *can* use GET and query string parameters with ScriptService. On the server side, it transforms the query string into JSON and so the parameters must be JSON encoded. E.g. /foo.asmx?intParam=1&stringParam=’foo’ — or %22foo%22. An “Invalid JSON primitive” exception is thrown for unquoted strings.

By: Jon

Jon — Thu, 31 Mar 2011 21:45:35 +0000

Thanks! This post saved me a lot of head scratching :)

By: Sangam Uprety

Sangam Uprety — Sat, 26 Mar 2011 02:42:57 +0000

With normal examples set out elsewhere, I won’t get this error since I am aware enough to supply data-value pair into data. But I stumbled when I was trying to get with YUI jsTree. They pass it somehow different leading the above mentioned error. Thanks you.

By: Hector Minaya

Hector Minaya — Mon, 07 Feb 2011 02:00:27 +0000

NIce,

I went through this some time ago and this post helped me get a grip on things…

By: Olan

Olan — Fri, 04 Feb 2011 01:09:56 +0000

Dave,
I am new to JQuery and I am finding out very quickly that debugging someone’s code that involves this technology is very difficult. Thanks for the post!

By: Dave Ward

Dave Ward — Thu, 03 Feb 2011 16:19:56 +0000

I definitely will. I still have a few more posts in mind for this series.