Question

我有一台需要与PC应用程序通信的MT2070扫描仪（发送和接收）。我已经使用Symbol.MT2000.ScannerServices程序集中的ScannerServicesClient.SendLabel从扫描仪发送到PC。

然而，在接收从用于扫描仪的PC发送的数据时，我没有取得任何成功。我没有设法在Symbol.MT2000程序集中找到任何看起来像处理这个或我找到任何接收数据的例子。

如果有人能指出我的例子或知道如何实现这一目标，我将不胜感激。

private readonly SerialPort _port = new SerialPort()

private void SetupPort()
{
  _port.PortName = "COM1";
  _port.BaudRate = 9600;
  _port.DataBits = 8;
  _port.Parity = Parity.None;
  _port.StopBits = StopBits.One;

  try
  {
    _port.Open();
    _port.DataReceived += PortDataReceived;
    _port.ErrorReceived += PortErrorReceived;
  }
  catch (Exception Ex)
  {
    OnCommsMessage("Exception opening port: " + Ex.Message);
  }
}

private void PortDataReceived(object sender, SerialDataReceivedEventArgs e)
{
  OnCommsMessage("PortDataReceived");
}

private void PortErrorReceived(object sender, SerialErrorReceivedEventArgs e)
{
  OnCommsMessage("PortErrorReceived");
}

似乎永远不会引发DataReceived。使用SerialPort.GetPortNames（）给我COM1，COM2，COM4，COM5，COM9，$ device \ COM21，$ device \ COM23。我已经尝试将端口设置为除最后两个之外的所有端口（不确定我是否应该为那些添加一些设备名称）

更新

工作解决方案

internal class MT2000CradleCommunicator : BaseCradleCommunicator
{
private readonly ScannerServicesClient _scannerServicesClient = new ScannerServicesClient();


public override void Start()
{
  if (_scannerServicesClient.Connect(true))
  {
    OnCommsMessage("ScannerServicesClient Connected");
    SetRawMode();
  }
  else OnCommsMessage("ScannerServicesClient Failed to connect");
}

public override void Send(string message)
{
  RESULTCODE result = _scannerServicesClient.SendRawData(MessageToRawData(message), 1000);
  if (result == RESULTCODE.E_OK)
  {
    Receive();
  }
  else OnCommsMessage("Error sending data: " + result);
}

private void SetRawMode()
{
  const int ATTRIBUTE_NUM_WIRED_HOST_NUM = 383;
  const byte API_HOST_RAW = 18;

  ScannerHostParameters hostParameters = new ScannerHostParameters(_scannerServicesClient);
  RawParameters rawHostParameters;
  RESULTCODE result = hostParameters.GetRawParameters(out rawHostParameters);
  if (result == RESULTCODE.E_OK)
  {
    rawHostParameters.Type = RawParameters.RawHostType.RS232;
    rawHostParameters.BaudRate = RawParameters.RawBaudRates.RAWSERIAL_9600;
    result = hostParameters.StoreRawParameters(rawHostParameters);
    if (result != RESULTCODE.E_OK)
      OnCommsMessage("Set Parameters failed: " + result);
  }
  else OnCommsMessage("GetParams failed: " + result);

  byte wHostNum;
  result = _scannerServicesClient.GetAttributeByte(ATTRIBUTE_NUM_WIRED_HOST_NUM, out wHostNum);
  if (result == RESULTCODE.E_OK)
  {
    OnCommsMessage("Get host: " + wHostNum);
    result = _scannerServicesClient.SetAttributeByte(ATTRIBUTE_NUM_WIRED_HOST_NUM, API_HOST_RAW);
    if (result != RESULTCODE.E_OK)
      OnCommsMessage("Set host failed: " + result);
  }
  else OnCommsMessage("Get host failed: " + result);
}

private static RawData MessageToRawData(string message)
{
  byte[] bytes = Encoding.ASCII.GetBytes(message);
  return new RawData(bytes, bytes.Length, 1);
}

private void Receive()
{
  RawData rawData;
  RESULTCODE result = _scannerServicesClient.ReadRawData(out rawData, 5000);
  if (result == RESULTCODE.E_OK)
  {
    OnCradleMessageReceived(BytesToAsciiString(rawData.Data));
  }
  else
  {
    OnCommsMessage("Comms timeout: Failed to receive data");
  }
}

private static string BytesToAsciiString(byte[] data)
{
  return Encoding.ASCII.GetString(data, 0, data.Length);
}

}

Answer 1

inthehand.com #2522有一个很好的通用示例。

此外，Stack Overflow Question 1528379还有一个很好的例子。他说他放弃了内置的COM端口并使用串行端口连接来建立他的连接。这似乎也是我过去所做的路线，也不会影响到Symbol的专有DLL。

修改

我不知道这是否有用，但这是我几年前写的一段旧代码。

您必须对其进行清理，以使其适用于您的应用程序。我的应用程序有一个TextBox控件，它从Global类读取并记录错误。改变它以适应你拥有的东西，它应该基本上是好的。

static class Scanner { const string _CODEFILE = "Scanner.cs - Scanner::"; static int _baud = 9600; static int _bits = 8; static string _dataIn = null; static string _port = "COM1"; static Parity _parity = Parity.None; static StopBits _stop = StopBits.One; static SerialPort _com1 = null; static TextBox _textbox = null; public enum ControlType { None, BadgeID, PartNumber, SerialNumber, WorkOrder }; static ControlType _control; public static bool Available { get { return ((_com1 != null) && (_com1.IsOpen)); } } public static bool Close { get { if (_com1 == null) return true; try { if (_com1.IsOpen) { _com1.Close(); } return (!_com1.IsOpen); } catch { } return false; } } public static string Open() { const string na = "Not Available"; if (_com1 == null) { string reset = Reset(); if (!String.IsNullOrEmpty(reset)) return reset; } try { _com1.Open(); return (_com1.IsOpen) ? null : na; } catch (Exception err) { return err.Message; } } static void ProcessData(string incoming) { _dataIn += incoming; if ((_control != ControlType.None) && (_textbox != null)) { bool ok = false; string testData = _dataIn.Trim(); switch (_control) { case ControlType.BadgeID: if (testData.Length == 6) { if (testData != BarCode.LOGOFF) { Regex pattern = new Regex(@"[0-9]{6}"); ok = (pattern.Matches(testData).Count == 1); } else { ok = true; } } break; case ControlType.PartNumber: if (testData.Length == 7) { Regex pattern = new Regex(@"[BCX][P057][0-9]{5}"); ok = (pattern.Matches(testData).Count == 1); } break; case ControlType.SerialNumber: if (testData.Length == 15) { Regex pattern = new Regex(@"[BCX][P057][0-9]{5} [0-9]{4} [0-9]{2}"); ok = (pattern.Matches(testData).Count == 1); } break; case ControlType.WorkOrder: if (testData.Length == 6) { Regex pattern = new Regex(@"[0-9]{6}"); ok = (pattern.Matches(testData).Count == 1); } break; } if (ok) { _textbox.Text = testData; _textbox.ScrollToCaret(); _dataIn = null; } } } static string Reset() { if (_com1 != null) { try { if (_com1.IsOpen) { _com1.DiscardInBuffer(); _com1.Close(); } } catch (Exception err) { return err.Message; } Global.Dispose(_com1); _com1 = null; } try { _com1 = new SerialPort(_port, _baud, _parity, _bits, _stop); _com1.DataReceived += new SerialDataReceivedEventHandler(Serial_DataReceived); _com1.Open(); } catch (Exception err) { return err.Message; } return null; } public static void ScanSource(ref TextBox objTextBox, ControlType objType) { _textbox = objTextBox; _control = objType; _dataIn = null; } static void Serial_DataReceived(object sender, SerialDataReceivedEventArgs e) { ProcessData(_com1.ReadExisting()); } public static void Settings(string ComPort, int BaudRate, Parity ParityValue, int Bits, StopBits StopBit) { _port = ComPort; _baud = BaudRate; _parity = ParityValue; _bits = Bits; _stop = StopBit; } /// <summary> /// Closes the COM Port /// COM Port routines are ready to add as soon as I am /// </summary> static bool ComPortClose { get { if (_com1 == null) ComPortReset(); return ((_com1 == null) ? true : _com1.IsOpen ? false : true); } set { if (_com1 == null) ComPortReset(); else if (_com1.IsOpen) { _com1.DiscardInBuffer(); _com1.Close(); } } } /// <summary> /// Opens the COM Port /// </summary> static bool ComPortOpen { get { if (_com1 == null) ComPortReset(); return (_com1 == null) ? false : _com1.IsOpen; } set { if (_com1 == null) ComPortReset(); if ((_com1 != null) && (!_com1.IsOpen)) _com1.Open(); } } /// <summary> /// Initialized the Serial Port on COM1 /// </summary> static void ComPortReset() { if ((_com1 != null) && (_com1.IsOpen)) { _com1.Close(); _com1 = null; } try { _com1 = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One); } catch (IOException err) { Global.LogError(_CODEFILE + "ComPortReset", err); } } }

Answer 2

不确定您是否还需要MT2070问题的答案 - 有一种名为ReadRawData的方法可以从计算机中读取。

此外，它需要处于原始模式，使用类似：

myScannerSvcClient.SetAttributeByte(
    (ushort)ATTRIBUTE_NUMBER.ATT_MIA_HOSTNUM,
    (byte)ENUM_HOSTS.HOST_RAW
    );

另外，如果您使用的是蓝牙SPP，则无法使用。需要通过支架（如果有的话）或直接连接USB电缆。

符号MT2070扫描仪从PC接收数据

2 个答案: