无法设置Microsoft POS C＃CharacterSet属性。

Question

我安装了Bixolon BCD-1000 OPOS Driver.It可以打印ASCII字符;但是我必须打印西里尔字符。当我尝试将CharacterSet 437（默认字符集）更改为999（UNICODE）时，它返回错误消息。 [故障信息] [1]

        public void DisplayStringOnPort(string line)
    {
        PosExplorer posExplorer = new PosExplorer();
        DeviceInfo receiptPrinterDevice = posExplorer.GetDevices()[0];
        var list = posExplorer.GetDevices();
        foreach(DeviceInfo x in list)
        {
            if(x.ServiceObjectName.Equals("BCD-1000"))
            {
                receiptPrinterDevice = x;

            }
        }
        LineDisplay printer = posExplorer.CreateInstance(receiptPrinterDevice) as LineDisplay;
        printer.Open();
        printer.Claim(1000);
        string str = "Кирилица";
        printer.CharacterSet = 999; // Unicode Fault Message 
        printer.DeviceEnabled = true;
        printer.DisplayTextAt(2, 1, text);
        printer.Close();
    }

我怎样才能克服这种情绪？ 感谢