Hello，

您可以检查以下几点:

-检查在应用程序web.config中配置的SQL Server名称/IP.您可以通过执行"ping< sql name ="或=""ip =">"来执行此操作在Web服务器上的cmd框中(！).
-尝试从Web服务器通过SQL Management Studio访问SQL Server(！)

***的问候，
停止

Hello,

There are some points you could check:

- Check the SQL Server Name / IP configured in the applications web.config. You can do this by execute "ping <sql name="" or="" ip="">" in a cmd box on the Web Server (!).
- Try to access the SQL Server via SQL Management Studio from the Web Server (!)

Best regards,
Stops

^ ]
这可能对您有帮助.

分享您已经完成的工作，以便其他人可以帮助您.

http://www.sqlmusings.com/2009/03/11/resolving-a-network-related-or-instance-specific-error-occurred-while-establishing-a-connection-to-sql-server/[^]
This may help you.

Share what you have already done, so that others can help you.

如果您使用的是网络服务器，请检查服务器计算机是否已启动.

If you are using network server check out the server machine is started or not.