Hi, 

我们需要更多信息来帮助你。

We need a bit more info to help you out.

只是为了确认你在本地运行SQL Server？代码也在本地运行？

Just to confirm you are running SQL Server locally? And the code also runs locally?

可以您使用SSMS中的相同凭据进行连接？

Can you connect using the same credentials from SSMS?