问题
Can someone tell me what I am missing? I am using this connection string to connect to my database and still it won't connect:
Dim str As String = "Provider = .NET Framework Data Provider for SQL Server; Data Source=C:\Users\konin\Documents\UHMS\bin\Debug\UHMS.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"
This is the process I used to get the data source:
- right-click the database
- select properties and click select data source
I hope I am clear enough. Thanks for reading.
Edit:
Error Message is as follows:
unable to connect to database please contact administrator
回答1:
Can you post the error? I've never seen the Data Source connected to a .mdf, only with "AttachDbFilename", you might want to take a look here for details on Connection strings for SQL.
回答2:
Most likely, you'll need something like this:
Dim str As String = "Server=.\SQLExpress;AttachDbFilename=C:\Users\konin\Documents\UHMS\bin\Debug\UHMS.mdf;Database=dbname; Trusted_Connection=Yes;"
You'll still need to have SQL Server Express installed on your machine in order to load this *.mdf file.
回答3:
Assuming yours is a web application... you need to place your file based database in the App_Data folder of your project for it to work. I noticed is located in the Debug folder...
来源：https://stackoverflow.com/questions/2081765/i-cannot-connect-to-sql-server-express-using-vb-net