public IActionResult UpdateFieldCategory(int id, string result) { _admin.DeleteAll(id); int count = result.Length - 1; string strID = result.Remove(count, 1); char[] dash = new char[] { '-' }; string[] strResult = strID.Split(dash); if (result != "0") { foreach (string item in strResult) { FieldCategory fieldCategory = new FieldCategory() { CategoryId = id, FieldId = Convert.ToInt32(item) }; _admin.AddFieldCategory(fieldCategory); } } return(RedirectToAction("Categories")); }