菜鸟教程地址：
http://www.runoob.com/jquery/ajax-ajax.html
html(../Home/Index.cshtml)
<body> <button class="Btn">按钮</button> </body>
js
contentType类型:"application/json; charset=utf-8","text/xml","application/x-www-form-urlencoded","application/x-javascript; charset=utf-8"
dataType类型:"json","html","text","script","jsonp","xml"
$(document).ready(function () { $(".Btn").click(function () { $.ajax({ type: "POST", url: "../Home/Index", data: {}, contentType: "application/x-www-form-urlencoded;charset=UTF-8", dataType: "json", success: function (data) { for(var i = 0;i < data.List.length;i++){
var obj = data.List[i];
alert(obj);
} }, error: function (data) { alert("出错了"); } }); }); });
HomeController
public JsonResult Index() { ArrayList list = new ArrayList() {"1","2","3" }; var m = new { List = list }; return Json(m ,JsonRequestBehavior.AllowGet); }