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[1024];
    // 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 > 0)
            cbb_serials.SelectedIndex = 0;

        btn_send.Enabled = false;
    }

    public static string GetHexStr<T>(T[] data, int len = -1, string separator = " ")
        where T : IComparable, IFormattable, IConvertible, IComparable<T>, IEquatable<T>
    {
        string hex = "";
        int upper = data.Length;
        if (len != -1) upper = len;
        for (int i = 0; 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, 9600);
            sp.ReceivedBytesThreshold = 1;
            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, 0, 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 - 1, 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 = 0; i < hexs.Length; i++)
        {
            hexs[i] = Byte.Parse(strs[i], NumberStyles.AllowHexSpecifier);
        }

        try
        {
            sp.Write(hexs, 0, hexs.Length);
        }
        catch (Exception exception)
        {
            Console.WriteLine(exception);
            throw;
        }
    }

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