使用 SerialPort  ，高速收发数据一段时间后，不再响应DataReceived事件。代码如下：
pre class=”brush: csharp”>
public CommPort()
{
Com = new SerialPort();
sftpCommandFilePath = ConfigurationManager.AppSettings[“sftpCommandFilePath”];
dal = new tsomvDAL();
}
/// <summary>
/// 串口打开事件
/// </summary>
/// <returns></returns>
public bool CommOpen(string port, string baudrate)
{
try
{
Com.PortName = port;
Com.Parity = Parity.None;
Com.BaudRate = 2400; //端口默认2400
Com.ReceivedBytesThreshold = 1;
Com.Open();
Com.DataReceived += new SerialDataReceivedEventHandler(Com_DataReceived);
return true;
}
catch (Exception ex)
{
LogHelper.LogError(string.Format(“打开串口出错：{0}”,ex.Message));
return false;
}
}
/// <summary>
/// 串口接受事件
/// </summary>
/// <param name=”sender”></param>
/// <param name=”e”></param>
private void Com_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
LogHelper.LogInfo(string.Format(“{0}：进入DataReceived，Closing is {1}”, Com.PortName, Closing.ToString()));
}
/pre>
这是最后一次进入事件打印的日志
2014-11-24 15:25:50 Info COM7：进入DataReceived，Closing is False
2014-11-24 15:25:50 Info COM7接收长度：48
2014-11-24 15:25:50 Info COM7进入while,bufferLst长度48
2014-11-24 15:25:50 Info 接收 COM7 串口数据：1010030341030044
2014-11-24 15:25:50 Info COM7进入while,bufferLst长度40
2014-11-24 15:25:50 Info 接收 COM7 串口数据：10100303414F0090
2014-11-24 15:25:50 Info COM7进入while,bufferLst长度32
2014-11-24 15:25:50 Info 接收 COM7 串口数据：1010030341500091
2014-11-24 15:25:50 Info COM7进入while,bufferLst长度24
2014-11-24 15:25:50 Info 接收 COM7 串口数据：1010030341070048
2014-11-24 15:25:50 Info COM7进入while,bufferLst长度16
2014-11-24 15:25:50 Info 接收 COM7 串口数据：1010030341510092
2014-11-24 15:25:51 Info COM7进入while,bufferLst长度8
2014-11-24 15:25:51 Info 接收 COM7 串口数据：1010030341520093
2014-11-24 15:25:51 Info COM7：退出DataReceived