calling controller using JQuery ajax calls

i have a user 开发者_如何学运维control contains 3 textboxes and a button added to a aspx page . When clicked it should make a ajax call to controller and pass data of textboxes and it should return a message....how can i do this

Example:

<input type="text" name="foo" id="foo" />
<input type="text" name="bar" id="bar" />
<input type="text" name="baz" id="baz" />
<%= Html.ActionLink("send to controller", "Ajax", "Home", null, new { id = "ajaxLink" }) %>

and in a separate javascript file you could ajaxify this link:

$(function() {
    $('#ajaxLink').click(function() {
        var data = { 
            foo: $('#foo').val(),  
            bar: $('#bar').val(),  
            baz: $('#baz').val()
        };
        $.getJSON(this.href, data, function(result) {
            alert(result.message);
        });
        return false;
    });
});

and the corresponding controller action which will receive the call and return JSON:

public class HomeController: Controller
{
    public ActionResult Ajax(string foo, string bar, string baz)
    {
        // TODO: do something with the arguments

        return Json(
            new { message = "Thanks for sending info" }, 
            JsonRequestBehavior.AllowGet
        );
    }
}

EDIT: Removed the "new" keyword when assigning the value for var data.