您需要将网络服务用户添加到SQL数据库中的授权用户。

You need to add the Network Service user to the authorized users in the SQL database.

在ApplicationPoolIdentity下你会找到本地系统。这将使您的应用程序在NT AUTHORITY \ SYSTEM下运行，默认情况下这是数据库的现有登录。



http://***.com/questions/7698286/login-failed-for-user-iis- apppool-asp-net-v4-0 [ ^ ]



，所以只需选择应用程序池 - >泳池入口 - >高级设置...（来自编辑应用程序池部分） - >过程模型（来自高级设置对话框）



http：/ /forums.asp.net/t/1510479.aspx [ ^ ]



http ：//blog.igorware.com/login-failed-for-user-iis/ [ ^ ]



http://www.aspdotnet-suresh.com/2011/05/systemdatasqlclientsqlexception-login.html [ ^ ]



just问题是你有没有权限使用数据库的用户......：）

Under ApplicationPoolIdentity you will find local system. This will make your application run under NT AUTHORITY\SYSTEM, which is an existing login for the database by default.

http://***.com/questions/7698286/login-failed-for-user-iis-apppool-asp-net-v4-0[^]

, So just select Application Pool -> a pool entry -> Advanced Settings... (from Edit Application Pool section) -> Process Model (from Advanced Setting dialog box)

http://forums.asp.net/t/1510479.aspx[^]

http://blog.igorware.com/login-failed-for-user-iis/[^]

http://www.aspdotnet-suresh.com/2011/05/systemdatasqlclientsqlexception-login.html[^]

just the matter is you have the user which does not have authority to use the database,......:)