/// <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);
}