public ActionResult GetAllAnnouncements() { var announcement = new Announcement("2020-09-14", "Krakow", "Fantastyka", "Test1", "Ziomek1", "jakisopis"); db.AddAnnouncement(announcement); var allAnnouncements = db.GetAllAnnouncements(); var jsonAnnouncement = new { date = allAnnouncements[0].Date, city = allAnnouncements[0].City, category = allAnnouncements[0].Category, title = allAnnouncements[0].Title, author = allAnnouncements[0].Author, description = allAnnouncements[0].Description, }; return(Json(jsonAnnouncement)); }