Unabel to connect to PUBS database

Whenever I try to connect to the PUBS.MDF database, a login failed error message will appear.

I defined the connection string in the web.config file like this:

Code:

---

<connectionStrings>
    <add name="Pubs" connectionString="Data Source = localhost\SQLEXPRESS; Initial Catalog=Pubs;Integrated Security=SSPI"/>
  </connectionStrings>

---

And setup the connection in the click event of a button

Code:

---

Dim connectionString As String = WebConfigurationManager.ConnectionStrings("Pubs").ConnectionString
       
Dim myConnection As New SqlConnection(connectionString)

myConnection.Open()

..........

---

And I put the PUBS.MDF file in the same folder as the vb source files.

How do I connect to the database correctly?

Don't place your MDF in the App_Code folder. It should be in the App_Data folder. Then, to "attach" it, use a connection string like:

Code:

---

Server=.\SQLExpress;AttachDbFilename=|DataDirectory|mydbfile.mdf; Database=dbname;Trusted_Connection=Yes;

---

I have tried the above connection string and have placed the database file in the app_data folder but there is still an error.

The message is:

Error reading the databaseDirectory lookup for the file "C:\ADONet\App_Data\PUBS.MDF" failed with the operating system error 5(Access is denied.). Could not attach file 'C:\ADONet\App_Data\PUBS.MDF' as database 'PUBS'.

The connection string I used is:

Code:

---

<add name="Pubs" connectionString="Data Source = .\SQLEXPRESS;
AttachDBFileName = C:\ADONet\App_Data\PUBS.MDF;Database=PUBS;
Database=PUBS;Integrated Security=SSPI;Trusted_Connection=Yes"/>

---

:(

ok, i've found that when the AttachDBFileName is set to C:\PUBS.MDF, the connection string can work.

But when I use the App_Data folder path, the connection does not work.

What's wrong? :sick:

Go to the App_Data folder and check to see if ASPNET or NETWORK SERVICE users have full permissions on it.