Server Error in ‘/’ Application.

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用户 ‘NQ’ 登录失败。该用户与可信 SQL Server 连接无关联。

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: 用户 ‘NQ’ 登录失败。该用户与可信 SQL Server 连接无关联。

登陆SQL引擎，采用windows身份验证登陆后修改 服务器身份验证 为： SQL Server和windows身份验证模式

切忌重启MSSQLSERVER服务生效。