c# - 网络断开时的WebSocket重新连接问题

Question

当我断开网络连接并再次重新连接时，我正在使用下面的套接字功能从套接字服务器接收数据，然后再次连接套接字应用程序停止接收数据。我还尝试添加一个计时器，该计时器每20秒检查一次套接字的状态，但不起作用。有什么建议吗？

private WebSocket client;  //before form_load

private void Form1_Load(object sender, EventArgs e)
{
    client = new WebSocket(host);

    client.OnOpen += (ss, ee) =>
      {
         MessageBox.Show(string.Format("Connected to {0} successfully ", host));
      };

    client.OnError += (ss, ee) =>
      {
         MessageBox.Show("     Error: " + ee.Message);
      };

    client.OnMessage += (ss, ee) =>
      {
         MessageBox.Show("Message: " + ee.Message);
      };

    client.OnClose += (ss, ee) =>
      {
        MessageBox.Show(string.Format("Disconnected with {0}", host));   
    };

    client.Connect();
}

private void timer1_Tick(object sender, EventArgs e)
 {
    if(client.ReadyState.ToString()=="Closed")
       {
          client.Close();
          client = new WebSocket(host);
          client.Connect();
       }

 }

Answer 1

您没有提到您使用的Web套接字库/程序包。这是一个使用WebSocket4Net的简单工作重新连接示例。

由于使用了AutoSendPing，当网络发生故障时，它会关闭连接，如果套接字已关闭，计时器会尝试重新连接。

private WebSocket client;

private void Form1_Load(object sender, EventArgs e)
{
    client = new WebSocket(host)
    {
        EnableAutoSendPing = true,
        AutoSendPingInterval = 10,
    };

    client.Opened += (ss, ee) =>
    {
        System.Diagnostics.Debug.WriteLine("Connected");
    };

    client.Error += (ss, ee) =>
    {
        System.Diagnostics.Debug.WriteLine($"Error {ee.Exception}");
    };

    client.MessageReceived += (ss, ee) =>
    {
        System.Diagnostics.Debug.WriteLine($"Message: {ee.Message}");
    };

    client.Closed += (ss, ee) =>
    {
        System.Diagnostics.Debug.WriteLine("Disconnected");
    };

    client.Open();
}

private void timer1_Tick(object sender, EventArgs e)
{
    if (client.State == WebSocketState.Closed)
    {
        client.Open();
        System.Diagnostics.Debug.WriteLine("Trying to reconnect by timer");
    }
}