ExecuteNonQuery requires an open and available Connection. The connection's current state is closed.
摘要：
今天调试一个监控程序，放到环境里发现不写库，于是给SQL执行类异常事件做了个日志，发现报：ExecuteNonQuery requires an open and available Connection. The connection's current state is closed.左看右看，没问题呀，后来才想起，using里没有执行db.Open，打开数据库连接。 public class SQLHelper : IDisposable { private IntPtr handle; private readonly Component com... 阅读全文