Private Sub LinkButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton1.Click
        Dim strFileName As String = CType(sender, LinkButton).CommandArgument
        Response.Clear()
        Response.ClearContent()
        Response.ClearHeaders()
        Response.AddHeader("Content-Disposition", "attachment; filename=""" + strFileName + "")
        Response.ContentType = "application/force-download"
        Response.WriteFile("c:\" + strFileName)
        Response.End()
    End Sub