Using Asp.net asmx unable to set open graph meta tag

Question

I am unable to set open graph meta tag using angularjs with asp.net aspx page.

Want to use meta content as

My ASP.net api url is : /WS/EmployeeService.asmx/imaps?aData=1028 returns json like "title":"motoG"

My Controller is:

 

var app2 = angular.module('main', []); app2.controller('myController', function ($scope, $http) {     $http.get("/WS/myservice.asmx/imaps?aData=1028").then(function (response) {         $scope.emp = response.data; }); });