Web API complex parameter properties are all null

Question

I have a Web API service call that updates a user\'s preferences. Unfortunately when I call this POST method from a jQuery ajax call, the request parameter object\'s proper

Answer 1

A bit late to the party, but I had this same issue and the fix was declaring the contentType in your ajax call:

    var settings = {
        HelpText: $('#help-text').val(),
        BranchId: $("#branch-select").val(),
        Department: $('input[name=departmentRadios]:checked').val()

    };

$.ajax({
        url: 'http://localhost:25131/api/test/updatesettings',
        type: 'POST',
        data: JSON.stringify(settings),
        contentType: "application/json;charset=utf-8",
        success: function (data) {
            alert('Success');
        },
        error: function (x, y, z) {
            alert(x + '\n' + y + '\n' + z);
        }
    });

And your API controller can be set up like this:

    [System.Web.Http.HttpPost]
    public IHttpActionResult UpdateSettings([FromBody()] UserSettings settings)
    {
//do stuff with your UserSettings object now
        return Ok("Successfully updated settings");
    }