/// <summary> /// 判断是否连接到打印机 /// </summary> /// <returns></returns> public bool ReConnectPrinter() { this.Close(); var openFlag = this.Open(); if (!openFlag) { throw new Exception("打开打印机串口失败"); } //如果串口正常,就检测是否存在打印机 var dataResult = WriteForResult(CommandFactory.GetCheckDeviceCommand(), 100); if (null == dataResult) { return(false); } return(true); }
/// <summary> /// 是否存在打印机 /// </summary> /// <param name="printerName"></param> /// <returns></returns> public bool HasPrinter(out string printerName) { //首先判断串口是否已经打开 if (null == _port || !_port.IsOpen) { //打开串口 var flag = Open(); if (!flag) { throw new Exception("打开打印机串口失败"); } } //如果串口正常,就检测是否存在打印机 var dataResult = WriteForResult(CommandFactory.GetCheckDeviceCommand(), 100); if (null == dataResult) { throw new Exception("没有扫描到喷码机"); } printerName = Encoding.Default.GetString(dataResult.GetData()); return(true); }