vb.net - ListItem VB .net

Question

hi i have a problem to iterate/ read a listItem in asp.net... i'd to read this listItem

.....

Dim l As ListItem ' it's already load



Protected Sub load_menu(ByVal address_url As String)
    Dim slug As String = address_url.Substring(25) 

    Dim str As String
    For Each str In l 'HERE THERE IS A PROBLEM
        If String.Compare(str, slug) = 0 Then
            txt_url.Text = str
            Stop
        End If

    Next
End Sub

compiler tell me that there is a problem with L, because is not a collection...

Do you have ideas how iterate a ListItem?

thanks for Your time :)