现有用户SQL Server 2012登录失败

Question

Using C# I'm trying to connect to an existing DB in SQL Server 2012, from Visual Studio 2012. I used the Visual Studio wizard to get my connection string, and I told it to use Windows Authentication (what I am using for my SQL DB, hosted locally on my system). This is the error I get:

Cannot open database "C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQ\DATA
\StockHolesDB.mdf" requested by the login. The Login failed.
Login failed for user '***\***'.

My connection string is "Data Source=(LocalDB)\\\\v11.0;AttachDbFilename=\\"C:\\\\Program Files\\\\Microsoft SQL Server\\\\MSSQL11.MSSQLSERVER\\\\MSSQL\\\\DATA\\\\StockHolesDB.mdf\\";Integrated Security=True;Connect Timeout=30"

Looking around online I saw that one of the solutions is to set that user up in the sql server. But that user is already set up in the server. A different username, but the same login name. And when I tried to add a new user with the same login name but different username it wouldn't work.

EDIT: I tried changing the DB name, and that didn't work either.

Answer 1

确保已在MSSQL上启用“ SQL Server和Windows身份验证模式”（在服务器上的“安全性”选项卡下，右键单击）