Puedes hacerlo asi
Código ASP:
Ver originalPublic Shared Sub buscarcodigodireccion(ByVal accion As String)
If conexion.State = Data.ConnectionState.Open Then
conexion.Close()
End If
conexion.Open()
Dim cM As New SqlCommand("select .....", conexion)
Dim dR As SqlDataReader = cM.ExecuteReader()
While dR.Read()
codigo = dR("cod_dir")
End While
dR.Close()
' conexion.Close()
codigo += 1
End Sub