在控制器获取View数据的4种方法

<fieldset>
        <legend>Submit data</legend>
    @using (Ajax.BeginForm("SubmitData", "Home",
                            new AjaxOptions {}))
    {
       <div>
             @Html.Label("Name")
                @Html.TextBox("txtName")
           <br />
            @Html.Label("Age")
                @Html.TextBox("txtAge")
       </div>
    <button>Submit</button>
    }   
</fieldset>

       [HttpPost]
        public ActionResult SubmitData()
        {
            string name = Request["txtName"].ToString();
            int age = Convert.ToInt32(Request["txtAge"].ToString());

            string result = "Name:" + name;
            result += "</br>" + "Age:" + age.ToString();
            return Content(result);
        }

       [HttpPost]
        public ActionResult SubmitData(FormCollection form)
        {
            string name = form["txtName"].ToString();
            int age = Convert.ToInt32(form["txtAge"].ToString());

            string result = "Name:" + name;
            result += "</br>" + "Age:" + age.ToString();
            return Content(result);
        }

       [HttpPost]
        public ActionResult SubmitData(string txtName, string txtAge)
        {
            string name = txtName;
            int age = Convert.ToInt32(txtAge);

            string result = "Name:" + name;
            result += "</br>" + "Age:" + age.ToString();
            return Content(result);
        }

@model mvcsample.Controllers.Person
<fieldset>
    <legend>Submit data</legend>
    @using (Ajax.BeginForm("SubmitData", "Home",
                            new AjaxOptions {}))
    {
        <div>
            <div class="editor-label">
                @Html.LabelFor(model => model.Name)
            </div>
            <div class="editor-field">
                @Html.EditorFor(model => model.Name)
            </div>
             <div class="editor-label">
                @Html.LabelFor(model => model.Age)
            </div>
            <div class="editor-field">
                @Html.EditorFor(model => model.Age)
            </div>
        </div>
        <button>Submit</button>
    }
</fieldset>

 public class HomeController : Controller
    {
        public ActionResult Index()
        {
            Person model = new Person();
            return View(model);
        }

        [HttpPost]
        public ActionResult SubmitData(Person person)
        {
            string name = person.Name;
            int age = person.Age;

            string result = "Name:" + name;
            result += "</br>" + "Age:" + age.ToString();
            return Content(result);
        }
    }

    public class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }