c# - WebApi 2 GET has special character in parameter -

my problem comes when call webapi2 get string parameter has special char (with normal character works correctly).

angularjs

this.getbycontactvalue = function (contactvalue) {            return $http.get("/api/subjects/"+ contactvalue+ "/contactvalue" );     } 

c#

[route("api/subjects/{contactvalue}/contactvalue")] public ienumerable<subject> getbycontactvalue(string contactvalue) {     return repository.getbycontactvalue(contactvalue); } 

the response 404 error. tried modify request in way

this.getbycontactvalue = function (contactvalue) {         var request = $http({             method: "get",             url: "/api/subjects/contactvalue", //modified route in c# controller             data: contactvalue         });         return request;     } 

but error same.

which best way call webapi?

you've pass data in query strings as

$http({     url: "/api/subjects/contactvalue",      method: "get",     params: {contactvalue: contactvalue}  }); 

update action

[route("api/subjects/contactvalue?contactvalue={contactvalue}")] public ienumerable<subject> getbycontactvalue(string contactvalue) {     return repository.getbycontactvalue(contactvalue); }