问现金抽屉不能通过使用WebClient打印SDK为爱普生tm-t88V asp .net MVC打开。

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[AllowAnonymous]
  public void PrintCommands(string useDefaultPrinter, string printerName)
    {

        ClientPrintJob cpj = new ClientPrintJob();
        cpj.BinaryPrinterCommands= System.IO.File.ReadAllBytes(Server.MapPath(@"~/App_Data/open.txt"));
        cpj.FormatHexValues = true;
        cpj.ClientPrinter = new DefaultPrinter();
        System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
        System.Web.HttpContext.Current.Response.BinaryWrite(cpj.GetContent());
        System.Web.HttpContext.Current.Response.End();

    }