MVC+JQuery实现跨域Jsonp调用Js

1.MVC控制器

/// <summary>

/// 处理Jsonp请求，若没有指定对应的jsoncallback，则返回Json

/// </summary>

/// <param name="data"></param>

/// <returns></returns>

private ActionResult Jsonp(object data)

{

  string jsoncallback = Request.QueryString["jsoncallback"];

  if (string.IsNullOrEmpty(jsoncallback))

  {

      return Json(data, JsonRequestBehavior.AllowGet);

  }

  return Content(string.Format("{0}({1})", jsoncallback, data.ToJson()), "text/plain", System.Text.Encoding.UTF8);

}



public ActionResult GetTime(string value)

{

  return Jsonp(DateTime.Now + ":" + value);

}

2.Javascript

$.ajax({

  async: true,

  url: 'http://localhost/test/gettime',

  type: 'GET',

  dataType: 'jsonp',

  jsonp: 'jsoncallback', 

  data: {value:"abc"},

  timeout: 1000,

  beforeSend: function() {

  },

  success: function(json) { 

      alert(json);

  },

  complete: function(XMLHttpRequest, textStatus) {

      //alert('complete');

  },

  error: function(xhr) {

      //alert("xhr");

  }

});