c# - JSON, getting information using HttpPost -

i'm recreating old cordova app in xamarin forms pcl , need access method that's on server, providing username , password , storing information comes back:

[httpget] public jsonresult loginuser(string username, string password) {     bool responseresult = false;     iebuser user = null;     string errmsg = string.empty;     try     {         if (string.isnullorempty(username))         {             throw new exception("username empty");         }         else if (string.isnullorempty(password))         {             throw new exception("username password");         }          // connect db , find user if can         user = selfservicemembership.getuserbyusername(username);          // if no suer user wasn't found or db errored         if (user == null)         {             throw new exception("username not found");         }          // decrypt pw , see if match username's account         passwordhash ph = new passwordhash();         password = ph.generatehash(password);          if (user.hashword != password)         {             throw new exception("password not match 1 on our records");         }         responseresult = true;     }     catch (exception ex)     {         errmsg = ex.message;     }      if (responseresult)     {         return json(new         {             result = responseresult,             user = new             {                 userid = user.userid,                 username = user.username,                 firstname = user.firstname,                 lastnmae = user.lastname,                 email = user.email             }         },         jsonrequestbehavior.allowget);     }     return json(new     {         result = responseresult,         errormessage = errmsg     },      jsonrequestbehavior.allowget);  } 

the old javascript code called method looks this:

// gets user info web service loginuser: function (username, password){     responsedata = null;     $.ajax({         type: "get",         url : app.currentcompanydetails.webserviceurl + this.apiroot + this.loginusercall,         datatype: "json",         data: {             username: username,             password: password         },         async: false,         crossdomain: true,         success: function(response) {             responsedata = response;         },          error: function (xhr, status, msg) {             alert(msg);         }     });     return responsedata; }, 

i can't seem find definitive answer anywhere on how accomplish in c#

here example showing how make post call. guess if change httpmethod.get should work too.

my example sends username , password rest api , if ok, returns cookie response. can change adapt needs.

private static cookie configuraracessoged() {   uri uri = new uri("url_from_api");   var req = new httprequestmessage(httpmethod.post, uri);   var reqbody = @"{       'username':'username',       'password':'password'     }";   req.content = new stringcontent(reqbody, encoding.utf8, "application/json");    cookiecontainer cookies = new cookiecontainer();   httpclienthandler handler = new httpclienthandler();   handler.cookiecontainer = cookies;   httpclient client = new httpclient(handler);   client.defaultrequestheaders.accept.add(new mediatypewithqualityheadervalue("application/json"));   client.defaultrequestheaders.accept.add(new mediatypewithqualityheadervalue("application/xml"));   httpresponsemessage resp = null;   try {     resp = client.sendasync(req).result;   } catch (exception ex) {     throw new exception("something went wrong");   }   if (!resp.issuccessstatuscode) {     string message;     if (resp.statuscode == httpstatuscode.unauthorized || resp.statuscode == httpstatuscode.forbidden || resp.statuscode == httpstatuscode.redirect)       message = "permission denied.";     else       message = resp.reasonphrase;      throw new exception(message);   }    ienumerable<cookie> responsecookies = cookies.getcookies(uri).cast<cookie>();   if (responsecookies.firstordefault() != null)     return responsecookies.firstordefault();   return null; } 

here method api:

[httppost, route("login")] public iactionresult login([fromservices] userservice userservice, [frombody]loginmodel login) {   using (var session = sessionfactory.opensession())   using (var transaction = session.begintransaction()) {     user user = userservice.login(session, login.username, login.password);     if (user == null)       return badrequest("invalid user");      var identity = new claimsidentity("filesystem");      identity.addclaim(new claim(claimtypes.name, login.username));     foreach (role r in user.roles) {       identity.addclaim(new claim(claimtypes.role, r.nome));     }     var principal = new claimsprincipal(identity);     httpcontext.authentication.signinasync("filesystem", principal).wait();   }   return ok(); }