Question

For reasons that is too long to explain in my .Net Win-Form Application I use a single global OleDbConnection to connect an Access DB. When I need, I open and close the connection, but generally the connection remains opened.
The problem is that sometimes the reading of the data not returns the updated datas:

Using cm As New OleDb.OleDbCommand(sQuery, cn)
    Using rd As OleDb.OleDbDataReader = cm.ExecuteReader()
        If rd.HasRows Then
            If rd.Read() Then
                Me.txtBrand.Text = rd.Item("MA_BRAND")
            End If
        End If
        rd.Close()
    End Using
End Using

While if I use a new connection I get the right data:

Using cn As New OleDb.OleDbConnection(sConnectionString)
    cn.Open()
    Using cm As New OleDb.OleDbCommand(sQuery, cn)
        Using rd As OleDb.OleDbDataReader = cm.ExecuteReader()
            If rd.HasRows Then
                If rd.Read() Then
                    Me.txtBrand.Text = rd.Item("MA_BRAND")
                End If
            End If
            rd.Close()
        End Using
    End Using
    cn.Close()
End Using

I have to use the global connection then my solution is this

cn.Close()
cn.Open()
Using cm As New OleDb.OleDbCommand(sQuery, cn)

But I ask: there is a better solution to refresh the OledbConnection?

Thank you!
Pileggi

Answer 1

The Jet Access engine caches stuff – that’s probably the problem.

Here’s a good link:

• How to Synchronize Writes and Reads with MS Access