串口接收数据 Overrun发生字符缓冲区溢出，下一个字符将丢失

[混QWER]

如题，串口接收数据定义如下：

 	   
            WinPort = new SerialPort(l_com);
            WinPort.BaudRate = l_rate;
            WinPort.DataBits = 8;
            WinPort.Parity = Parity.None;
            WinPort.Encoding = System.Text.Encoding.GetEncoding("GB2312");
            WinPort.StopBits = StopBits.One;
            WinPort.ReceivedBytesThreshold = 1;
            WinPort.DataReceived += new SerialDataReceivedEventHandler(DevicePort_DataReceived);
            WinPort.ErrorReceived += new SerialErrorReceivedEventHandler(DevicePortError_DataReceived);

有没有大神知道可能的原因都有哪些。

[xian_wwq]

串口接收数据长度是不确定的 所以要根据串口协议来确定完整包的长度， 避免接收长度不足时进行解析

[xian_wwq]

WinPort.ReceivedBytesThreshold = 1; 只要接收长度大于1即触发事件 这样的话事件触发比较频繁， 如果接收buffer太小，也可能会导致数据丢失