If e.Item.ItemType = ListViewItemType.DataItem Then
  Dim rigaDati = DirectCast(e.Item.DataItem, DataRowView)
  Dim path = Replace("~/Articoli/Immagine.ashx?FileName=" & rigaDati("ImageName"), "\\percorso\", "")
  path = "http://" & Me.Request.Url.Host & ResolveUrl(path)
  
  Dim sBase64 As String = "data:image/jpg;base64,"
  
  Using w As New System.Net.WebClient()
    Dim buffer As Byte() = w.DownloadData(path)
    sBase64 &= Convert.ToBase64String(buffer)
  End Using
  
  DirectCast(e.Item.FindControl("myIMG"), System.Web.UI.WebControls.Image).ImageUrl = sBase64
End If