MVC - Postback on clicking a radio button

I am fairly new to MVC. I have a simple problem. I have 3 radio buttons on my开发者_开发技巧 mvc asp.net page. I would like to call an action in my controller when I check one of the radio buttons on the page. How do I do a postback in mvc?

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If you had radio buttons like:

<input type="radio" name="sex" value="male" /> Male<br />
<input type="radio" name="sex" value="female" /> Female

You could add script (assuming you can use jQuery) on the page like:

<script type="text/javascript">
    $(function () {
        $(':radio[name="sex"]').change(function () {
            $.ajax({
                url: 'sex',
                type: 'POST',
                data: { sex: $(':radio[name="sex"]:checked').val() },
                success: function (xhr_data) {
                    alert(xhr_data.someValue);
                }
            });
        });
    });
</script>

Assuming you have an action method in the same controller as the one that generated your view:

public class YourController : Controller
{
    public ActionResult sex(string sex)
    {
        // do something awesome
        return Json(new { someValue = "testing!" });
    }
}

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The answer above only worked for me when I did

data: { sex: $('radio[name="sex"]:checked').val() },

That is, when I added ':checked' to the selector.