Winform中使用Reactivex代替BeginInvoke/Invoke来更新UI数据

首先通过Nuget安装包System.Reactive.

ReactiveX项目 Url: https://github.com/Reactive-Extensions/Rx.NET

 public partial class ZSerialportForm : Form
 {
     private SerialPort sp;
     private byte[] buffer = new byte[];
     // 定义ReactiveX对象
     private IScheduler scheduler = new DispatcherScheduler(Dispatcher.CurrentDispatcher);
     public ZSerialportForm()
     {
         InitializeComponent();
     }

     private void ZSerialportForm_Load(object sender, EventArgs e)
     {
         cbb_serials.Items.AddRange(SerialPort.GetPortNames());
         if (cbb_serials.Items.Count > )
             cbb_serials.SelectedIndex = ;

         btn_send.Enabled = false;
     }

     public static string GetHexStr<T>(T[] data, int len = -, string separator = " ")
         where T : IComparable, IFormattable, IConvertible, IComparable<T>, IEquatable<T>
     {
         string hex = "";
         int upper = data.Length;
         if (len != -) upper = len;
         for (int i = ; i < upper; i++)
         {
             hex += data[i].ToString("x2", new NumberFormatInfo());
             hex += separator;
         }

         hex = hex.TrimEnd(separator.ToCharArray());
         return hex;
     }

     /// <summary>
     /// 打开串口
     /// </summary>
     private void btn_open_Click(object sender, EventArgs e)
     {
         if (btn_open.Text == "打开")
         {
             sp = new SerialPort(cbb_serials.Text, );
             sp.ReceivedBytesThreshold = ;
             sp.DataReceived += OnDataReceived;
             //sp.WriteTimeout = 50;
             //sp.ReadTimeout = 50;
             sp.Open();
             sp.DiscardInBuffer();
             sp.DiscardOutBuffer();
             btn_send.Enabled = true;
             btn_open.Text = "关闭";
         }
         else if (btn_open.Text == "关闭")
         {
             sp.Close();
             sp = null;
             btn_send.Enabled = false;
             btn_open.Text = "打开";
         }
     }

     /// <summary>
     /// 读取串口
     /// </summary>
     private void OnDataReceived(object sender, SerialDataReceivedEventArgs e)
     {
         if (e.EventType == SerialData.Chars)
         {
             int len = sp.Read(buffer, , sp.BytesToRead);
             string hex = GetHexStr(buffer, len);
             // 使用ReactiveX的方式更新UI数据
             scheduler.Schedule(() =>
             {
                 lb_read.Items.Add(hex);
                 lb_read.SetSelected(lb_read.Items.Count - , true);
             });
         }
     }

     /// <summary>
     /// 发送数据
     /// </summary>
     private void btn_send_Click(object sender, EventArgs e)
     {
         string[] strs = tb_send.Text.Split(' ');
         byte[] hexs = new byte[strs.Length];
         for (int i = ; i < hexs.Length; i++)
         {
             hexs[i] = Byte.Parse(strs[i], NumberStyles.AllowHexSpecifier);
         }

         try
         {
             sp.Write(hexs, , hexs.Length);
         }
         catch (Exception exception)
         {
             Console.WriteLine(exception);
             throw;
         }
     }

     private void ZSerialportForm_FormClosed(object sender, FormClosedEventArgs e)
     {
         if (sp != null)
             sp.Close();
     }
 }