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");
  }
});