this is the code of your button
<a href="AddNewUserAdmin"
class="btn btn-info "
ng-click="showaddnewuserpage()">
<span class="glyphicon glyphicon-plus-sign"></span> Add User</a>
in the controller just add this function.
var app = angular.module('userAPP', []);
app.controller('useraddcontroller', function ($scope, $http, $window) {
$scope.showaddnewuserpage = function () {
$window.location.href = ('/AddNewUserAdmin');
}
});