为什么需要重载?刷新时查询字符串是否仍然存在?您是否认为告诉我们错误消息和错误行可能有助于我们告诉您什么地方出了错?

Why do you need to reload it at all ? Is your query string still present when you refresh ? Did you consider that telling us the error message and line of the error might help us tell you what is wrong ?