Call a Web ApI method with Parameters using AngularJS

Question

I am calling a web API with angularJS Service.

My webp API method is working fine without parameters '/api/Subpart/'

When i tried to pass parameters , Web API method is not firing.

Angular service

.service('subpartService', ['$http', function ($http) {
     this.getSubparts = function (val) {
       return $http.get('/api/Subpart/'+val); // With parameters not working
     };
 }])

Web API Controller Action

[Route("api/Subpart/{strsubpart}")]
public List<tbl_Employee> GetSubparts(string strsubpart)
{
    Entities db = new Entities();
    var data = db.tbl_Regulation.Where(c => c.Subsection == "ABC");
    return data.ToList();
}

Answer 1

I have the solution.It has pass parameters with ?

this.getSubparts = function (val) {
           var subUrl = "http://localhost/api/Subpart/sub_part?subpart="+ val;
             return $http.get(subUrl);
         };