How to give connection to my sdf file

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Hi,

I am writing a connection string as below
cn = New SqlCeConnection([String].Format("Data Source=\Program Files\Compuage\compuage.sdf"))

But i want my compuage.sdf file at the location where my application is installed, not at a particular path.

Can anyone help me

Thanks in advance

Posted 23-May-11 0:37am

Saumyavemula

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OriginalGriff · Answer 1 · 2011-05-23T01:03:00

Solution 1

Bad idea: you shouldn't store any data under Program Files, and you shouldn't store data under you app location either. Security policies may prevent you writing to them, if not now, then in future.
Instead, put it in your application data folder:

Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)

Posted 23-May-11 1:03am

OriginalGriff

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Saumyavemula 23-May-11 7:24am

I mean i want to save my sdf file and exe at the same location

OriginalGriff 23-May-11 7:44am

And I mean: not a good idea.
Security policy may mean that "normal" access to your application EXE directory could be Execute and / or read: but without write access.
Much better to use a data folder where write permissions will always be available.

wallyg34 · Answer 2 · 2011-05-23T01:28:00

Try this. Ensure you have the sqlce server installed first.

Dim conn As SqlCeConnection = Nothing
Dim rdr As SqlCeDataReader = Nothing
Dim connStr As String = "Data Source = C:\myfiles\PPL.sdf; Password ='xxxxxxxxxx'"
conn = New SqlCeConnection(connStr)
Dim cmd As New SqlCeCommand("SELECT * FROM PPL Where CODE='" & Trim(PPID) & "'", conn)
conn.Open()
rdr = cmd.ExecuteResultSet(ResultSetOptions.Updatable)
Try
While rdr.Read()
a = rdr.GetSqlInt64(47).ToString
If Not rdr.IsDBNull(2) Then a = rdr.GetString(2)
End While
Catch ex As Exception
messagebox.show( ex.ToString & vbCrLf)
Finally
rdr.Close()
rdr.Dispose()
conn.Close()
End Try