这种情况是不是用委托呢？

Question

委托串口接收事件

Answer 1

SerialDataReceivedEventHandler这本身就是一个委托，你转到它的定义去看一下是什么类型，你那个方法就传此类型的参数

Answer 2

我就是用委托把方法当参数传进去，然后编译通过，我只要打开串口 然后接收 就说我串口名是null值 说明还有没有注册到该事件。
可能是我写错了。我把源码贴一下吧。先是定义了委托  public delegate void DataReceivedRegister(object sender, System.IO.Ports.SerialDataReceivedEventArgs e);然后 在 封装类里 写一个公共方法 public void DataReceived(DataReceivedRegister dataReceived)
        {            this.communication.serialPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(dataReceived);
        }
然后 主form1下  public partial class MainWindow : Window
    {
        private delegate void DelegateUpdateUI();        SPCL.Processing mag_obj = new Processing();
        public MainWindow()
        {
            InitializeComponent();
            this.LoadingWindows();
        }        private void LoadingWindows()
        {
            this.mag_obj.AddPortInfo(comboBox1, PortProperty.PortName);
            this.mag_obj.AddPortInfo(comboBox2, PortProperty.BaudRate);
            this.mag_obj.AddPortInfo(comboBox3, PortProperty.DataBit);
            this.mag_obj.AddPortInfo(comboBox4, PortProperty.ParityBit);
            this.mag_obj.AddPortInfo(comboBox5, PortProperty.StopBit);
            this.mag_obj.DataReceived(serial_port_DataReceived);        }        void serial_port_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            // 更新主线程上的控件来显示数据
            Dispatcher.Invoke(new DelegateUpdateUI(this.UpdateControl));
           // throw new NotImplementedException();
        }

Answer 3

串口的OPEN和CLOSE方法在哪里?
OPEN之前,你需要设置串口名,波特率,数据位,校验位,停止位,这些在你代码里都没看到.

Answer 4

在click按钮事件下面写了 串口配置 和 打开串口了
 private void button1_Click(object sender, RoutedEventArgs e)
        {
            this.mag_obj.StartPort(
                this.comboBox1.Text,
                this.comboBox2.Text,
                this.comboBox3.Text,
                this.comboBox4.Text,
                this.comboBox5.Text);
        }然后 info 是一个串口信息的结构体    public void StartPort(string name,string baud,string data,string parity,string stop)
        {
            var info =this.communication.portInfo;            info.PortName = name;
            info.BaudRtae = baud;
            info.DataBits = data;
            info.ParityBits = parity;
            info.StopBits = stop;            this.communication.ConfigurePort();
            this.communication.OpenPort();
        }

Answer 5

我可能猜到问题了 问题出在 var
var info =this.communication.portInfo;
            info.PortName = name;把 var 当 object用了

Answer 6

还是说,你StartPort的方法本身就在类里

Answer 7

原先
var info =this.communication.portInfo;
 
            info.PortName = name;
            info.BaudRtae = baud;
            info.DataBits = data;
            info.ParityBits = parity;
            info.StopBits = stop;
改成 this.communication.portInfo.PortName = name;
            this.communication.portInfo.BaudRtae = baud;
            this.communication.portInfo.DataBits = data;
            this.communication.portInfo.ParityBits = parity;
            this.communication.portInfo.StopBits = stop;            this.communication.ConfigurePort();
            this.communication.OpenPort();
顺利读到数据了。
    现在 基本上把串口通信功能 封装成一个相对高内聚的dll 了。也非常感谢各位来回答我的问题 结贴了。