add-添加串口关闭自动打开

SlnMesnac.RfidUpload.Business/SerialPortBusiness.cs

@@ -39,6 +39,16 @@ namespace SlnMesnac.RfidUpload.Business
         public delegate void RefreshLogMessage(string message);
         public event RefreshLogMessage RefreshLogMessageEvent;
 
+        #endregion
+
+        #region 串口通讯变量定义
+        private  string _port;
+        private  int _baudRate;
+        private  int _parity;
+        private  int _dataBits;
+        private  int _stopBits;
+
+
         #endregion
 
         private SerialPort _serialPort;
@@ -74,6 +84,14 @@ namespace SlnMesnac.RfidUpload.Business
             {
                 throw new ArgumentException("串口号不能为空");
             }
+             
+            //#region 变量赋值
+            //_port = serialPort;
+            //_baudRate = baudRate;
+            //_parity = parity;
+            //_dataBits = dataBits;
+            //_stopBits = stopBits;
+            //#endregion
 
             _serialPort = new SerialPort(serialPort, baudRate, (System.IO.Ports.Parity)parity, dataBits, (StopBits)stopBits);
             _serialPort.DataReceived += SerialPortDataReceived;
@@ -105,6 +123,15 @@ namespace SlnMesnac.RfidUpload.Business
         {
             try
             {
+                if (!_serialPort.IsOpen)
+                {
+                    Console.WriteLine($"串口未打开:{_serialPort.PortName}"); 
+                    _serialPort.Open();
+                    if(!_serialPort.IsOpen )
+                    {
+                        RefreshLogMessageEvent?.Invoke("多次连接串口失败,请检查串口是否正常");
+                    }
+                }
                 Thread.Sleep(200);
                 int bytesToRead = _serialPort.BytesToRead;
                 byte[] buffer = new byte[bytesToRead];