Unable to send VB.NET variable to javascript using code behind

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VB

ASP.NET

Javascript

I am trying to send a vb variable to Javascript using code behind. It's not something I have ever done before.

I am getting the error queryNoVb is not declared. It may be inaccessible due to its protection level in the aspx page.

Thanks

What I have tried:

VB.NET code:

Public Class WebService
    Public Function queryNoForCodeBehind()
        Dim userId As Integer = Session.Item("uid")
        Dim groupId As Integer = Session("gid")
        Dim layers As New List(Of Object)
        Return getQueryNoFunction(Settings.Dif, userId, layers)
    End Function
End Class

Code Behind:

Public Class getQueryNoClass
    Inherits WebService
    Dim webServiceInstance = New WebService

    Public queryNoVb As Integer = webServiceInstance.queryNoForCodeBehind()
End Class

aspx page:

<script>
   function getQueryNo() {
       var queryNoImport = <%=queryNoVb%>;
   }
</script>