How to Get Path Value in ax 2012

static void Job39(Args _args)
{
    Dialog dialog;
    Filename filename;
    DialogField dialogFilename;
    str myCsvFile;
    ;
    dialog = new dialog();
    dialog.caption("Choose a file");
    dialogFilename = dialog.addField(extendedTypeStr(FilenameOpen));
    dialog.run();

    if(dialog.closedOk())
    {
    filename = dialogFileName.value();
    #define.file("@'"+filename+"'")
    myCsvFile = #file;
    info(myCsvFile);
    }
}