由于.js文件不被asp.net mvc的视图引擎解析，你根本无法使用任何C＃code在那里。我会建议使用不显眼的方式，像这样

As .js files are not parsed by asp.net mvc view engine, you simply cannot use any c# code in there. I would suggest using unobtrusive approach, something like this

<div id="loader" data-request-url="@Url.Action("Action", "Controller")"></div>

和在JavaScript中，数据请求URL的使用价值

And in javascript, use value of data-request-url

$(function(){
   $('#loader').click(function(){
       var url = $(this).data('request-url');
       alert(url);
   });
});