[HttpPost]
        public JsonResult DeleteAdminLog(string id = "")
        {
            var filter = Builders<BsonDocument>.Filter.Eq("_id", new ObjectId(id));
            var collection = DBHelper.GetCollection("AdminLog");
            var result = collection.DeleteOne(filter);
            if (result.DeletedCount > 0)
            {
                return Json("刪除成功");
            }
            else
            {
                return Json("刪除失敗");
            }
        }
 

這裡必須用 new ObjectId(id)對傳入的值進行轉換，否則刪除失敗