在Javascript文件中插入PHP变量值(Inserting PHP variable value in Javascript file)

 连接应自动关闭。 Sybase EF支持类中可能存在资源泄漏。 
 
 有关更多信息，请参阅管理连接 请注意（默认情况下）EF将为每个查询或SaveChanges调用打开并配置数据库连接。 如果Sybase的支持类不能很好地处理这个问题（例如，使用连接池），那么资源泄漏可能会变得明显，否则就不会。 
 
 所以实际上using语句不会关闭EF连接（除非你手动打开它）。 它应该在到达using语句结束之前已经被释放（释放到连接池或关闭）。 

The connection should be closed automatically. It's possible that there is a resource leak in the Sybase EF supporting classes.
 
See Managing Connections for more information. Note that (by default) EF will open and dispose a database connection for each query or SaveChanges call. If Sybase's supporting classes do not handle this well (e.g., with a connection pool), then a resource leak may become noticeable when it would otherwise not be.
 
So actually the using statement does not close the EF connection (unless you've manually opened it). It should have already been disposed (released to the connection pool or closed) before reaching the end of the using statement.