jquery - ajax posting from a partial view to controller is null -

i have baffling , quite silly problem.

i have weakly typed partial view in mvc4 application. on have button

<input type="button" class="btn btn-primary btn-lg" value="find" id="fej-find" /> 

i send jquery ajax call controller this

//searchedjob.num = $("#fej-jobnumber").val(); //var dto = { searchedjob: searchedjob }; var dto = { searchedjobnumber: $("#fej-jobnumber").val() }; $.ajax({     data: json.stringify(dto),     type: 'post',     url: '@url.action("searchjobs", "jobs")',     success: function (msg) {         return alert(msg);     } }); 

firebug shows me this

but when debug, controller shows this.

something wrong code. be?

you don't need json.stringify anything. pass value in data parameter same key action parameter name (searchednumber):

$.ajax({     url: '@url.action("searchjobs", "jobs")',     type: 'post',     data: { searchednumber: $("#fej-jobnumber").val() },     success: function (msg) {         alert(msg);     } }); 

also notice should not returning value success callback.

you use json when want send larger , more complex payloads server, example entire models. example let's suppose have following view model:

public class myviewmodel {     public int id { get; set; }     public string name { get; set; }     public ienumerable<string> tags { get; set; } } 

which controller action takes parameter:

[httppost] public actionresult someaction(myviewmodel model) {     ... } 

now send json client:

var model = {     id: 5,     name: $('#some_input_field').val(),     tags: [ "tag1", "tag2", "tag3" ] }; $.ajax({     url: '@url.action("somecontroller", "someaction")',     data: json.stringify(model),     contenttype: 'application/json',     success: function(result) {         alert(result);     } }); 

notice how in case need set proper content-type request header application/json default model binder on server able automatically deserialize request body payload corresponding view model.