为什么它不起作用，控制台程序转换为 Windows Form C# [关闭]

Question

我有一个程序可以在 UDP 之后从游戏中读取遥测数据；在控制台版本中，它可以完美运行。我想制作一个 Windows 窗体版本，但我不知道如何强制它工作。从理论上讲，我认为它应该有效。 对不起，也许是一个微不足道的问题；我是初学者。

控制台程序：

namespace F12021
{
    class Program
    {
        static void Main(string[] args)
        {
            F12020TelemetryClient client = new F12020TelemetryClient(20777);
            client.OnCarTelemetryDataReceive += TelemetryUpdate;

            client.OnConnectStatusChanged += OnConnectStatusChange;
            Console.CursorVisible = false;
            Console.Read();
        }

        private static void OnConnectStatusChange(bool connected)
        {
            if (!connected)
            {
                Console.Clear();
                Console.WriteLine("Listening for F1 2020...");
            }
        }

        private static void TelemetryUpdate(PacketCarTelemetryData packet)
        {
            int playerIndex = packet.Header.playerCarIndex;
            CarTelemetryData playerData = packet.carTelemetryData[playerIndex];
            Console.SetCursorPosition(0, 0);

            WriteLine($"Throttle: {playerData.throttle}");
        }

        private static void WriteLine(string input)
        {
            Console.Write(input.PadRight(Console.WindowWidth, ' '));
        }
    }
}

Windows 窗体：

namespace F1_2021
{
    public partial class Form1: Form
    {
       
       
        public Form1()
        {
            
            InitializeComponent();
        }
        

        private void Form1_Load(object sender, EventArgs e)
        {
            F12020TelemetryClient client = new F12020TelemetryClient(20777);
            client.OnCarTelemetryDataReceive += TelemetryUpdate;
            client.OnConnectStatusChanged += OnConnectStatusChange;
        }

        private void OnConnectStatusChange(bool connected)
        {
            if (!connected) { label1.Text = "Not conected wait....."; }
            else {  label1.Text = "Conected"; }
        }

        private void TelemetryUpdate(PacketCarTelemetryData packet)
        {
             
            int playerIndex = packet.Header.playerCarIndex;
            CarTelemetryData playerData = packet.carTelemetryData[playerIndex];
            label2.Text = (playerData.throttle).ToString() ;

        }
    }
}

我有什么不明白的？

Answer 1

在您的控制台应用程序中，只要应用程序正在运行，F12020TelemetryClient 实例就会一直保持活动状态。

在您的 Windows 窗体应用程序中，它是 Form_Load 方法中的一个局部变量。一旦该方法结束，它就有资格进行垃圾收集。改为将其作为您班级的一个字段。

您还需要检查是否在 UI 线程上引发了事件；如果没有，您需要先对 UI 线程的调用进行编组，然后才能更新任何控件。

public partial class Form1 : Form
{
    private F12020TelemetryClient _client;
    
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        _client = new F12020TelemetryClient(20777);
        _client.OnCarTelemetryDataReceive += TelemetryUpdate;
        _client.OnConnectStatusChanged += OnConnectStatusChange;
    }

    private void OnConnectStatusChange(bool connected)
    {
        if (InvokeRequired)
        {
            BeginInvoke((Action<bool>)OnConnectStatusChange, connected);
        }
        else
        {
            if (!connected) { label1.Text = "Not conected wait....."; }
            else {  label1.Text = "Conected"; }
        }
    }

    private void TelemetryUpdate(PacketCarTelemetryData packet)
    {
        if (InvokeRequired)
        {
            BeginInvoke((Action<PacketCarTelemetryData>)TelemetryUpdate, packet);
        }
        else
        {
            int playerIndex = packet.Header.playerCarIndex;
            CarTelemetryData playerData = packet.carTelemetryData[playerIndex];
            label2.Text = (playerData.throttle).ToString() ;
        }
    }
}

Answer 2

尝试将客户端移到顶部

 public partial class Form1 : Form
{
 
 F12020TelemetryClient client = new F12020TelemetryClient(20777);

 public Form1()
....

Answer 3

谢谢你一切都已经正常工作了。

namespace F1_2021
{
    public partial class Form1 : Form
    {
       
        F12020TelemetryClient client = new F12020TelemetryClient(20777);

        public Form1()
        {
            
            InitializeComponent();
        }
        

        private void Form1_Load(object sender, EventArgs e)
        {
            client.OnCarTelemetryDataReceive += TelemetryUpdate;
            client.OnConnectStatusChanged += OnConnectStatusChange;
          
        }
 
        private void OnConnectStatusChange(bool connected)
        {
            label1.Invoke(new Action(delegate ()
            {
                if (!connected) { label1.Text = "Not conected wait....."; }
                else { label1.Text = "Conected"; }
            }));
        }

        private void TelemetryUpdate(PacketCarTelemetryData packet)
        {
             
            int playerIndex = packet.Header.playerCarIndex;
            CarTelemetryData playerData = packet.carTelemetryData[playerIndex];
              label2.Invoke(new Action(delegate ()
              {
                label2.Text = (playerData.throttle).ToString();
              }));       

        }
    }
}