[Angular Execute Error] Access to XMLHttpRequest at 'http://XXX' from origin 'http://localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
環境
Angular (version 5.2.6) (http://localhost:4200) 使用 HttpClientModule http.get().subscript() 連線至 http://localhost:57457/ 某 ASP.NET Handler (.ashx) 取得 JSON string 資料
