Parameter to Web Service via Jquery Ajax Call - ajax

Question

I am using revealing module pattern and knockout to bind a form. When data is entered in that form(registration), it needs to be posted back to MVC4 web method.
Here is the Jquery code
/*
Requires JQuery
Requires Knockout
*/
op.TestCall = function () {
// Private Area
var _tmpl = { load: "Loading", form: "RegisterForm"};
var
title = ko.observable(null)
template = ko.observable(_tmpl.load),
msg = ko.observable(),
postData = ko.observable(),
PostRegistration = function () {
console.log("Ajax Call Start");
var test = GetPostData();
$.ajax({
type: "POST",
url: obj.postURL, //Your URL here api/registration
data: GetPostData(),
dataType: "json",
traditional: true,
contentType: 'application/json; charset=utf-8'
}).done(Success).fail(Failure);
console.log("Ajax Call End");
},
GetPostData = function () {
var postData = JSON.stringify({
dummyText1: dummyText1(),
dummyText2: dummyText2(),
});
return postData;
}
return {
// Public Area
title: title,
template: template,
dummyText1: dummyText1,
dummyText2: dummyText2
};
}();
The controller code is simple as per now
// POST api/registration
public void Post(string data)
{
///TODO
}
When i am trying to, capture the data (using simple console.log) and validate it in jslint.com, it's a valid Json.
I tried hardcoding the data as
data: "{data: '{\'name\':\'niall\'}'}",
But still i get as null, in my web method.
Added the tag [System.Web.Script.Services.ScriptMethod(UseHttpGet = false, ResponseFormat = System.Web.Script.Services.ResponseFormat.Json)] to my Post method in controlled, but still no fruitful result
Even tried JSON.Stringify data: JSON.stringify(data) but still i get null in my web-method.
I am not able to figure out the solution.
Similar issue was found # this link
http://forums.asp.net/t/1555940.aspx/1
even Passing parameter to WebMethod with jQuery Ajax
but didn't help me :(

Answer 1

MVC and WebApi uses the concept of Model Binding.
So the easiest solution is that you need to create a Model class which matches the structure of the sent Json data to accept the data on the server:
public void Post(MyModel model)
{
///TODO
}
public class MyModel
{
public string DummyText1 { get; set; }
public string DummyText1 { get; set; }
}
Note: The json and C# property names should match.

Answer 2

Only escaped double-quote characters are allowed, not single-quotes, so you just have to replace single quotes with double quotes:
data: "{data: '{\"name\":\"niall\"}'}"
Or if you want to use the stringify function you can use it this way:
data: "{data: '" + JSON.stringify(data) + "'}"