AJAX Post of JavaScript String Array to JsonResult as List<string> Always Returns Null?
I faced the same problem after updating to jquery 1.4.2. You can find the solution here (in the Ajax section).
Adding traditional : true in the ajax options should work.
$.ajax({ type: "POST", traditional: true, url: "/Test/JSONTestAction", async: false, data: parms, dataType: "json", success: function(data) { // success }});
This change was to make native behavior better for PHP/Rails users, you can read about the params changes more here.
You can enable it per-request like this:
$.ajax({ //Stuff... traditional:true });Or globally like this (only need to run once before firing any requests):
jQuery.ajaxSettings.traditional = true;