来自EventHandler的Console.Writeline

Question

我写了一个简单的异步TCP-Server - 效果很好.但是现在我想在Console-Testprogram上输出收到的数据.问题是,这不起作用!如果我将MainThread连接到EventHandler,程序什么都不做.Debug显示调用了sc05Server_DataAvailable,但后来什么也没发生.该计划仍然响应.

这里的代码:

private void ReadCallback(IAsyncResult asyncResult)
{
    Sc05BdClient sc05BdClient = asyncResult.AsyncState as Sc05BdClient;
    if (sc05BdClient == null) return;
    NetworkStream networkStream = sc05BdClient.NetworkStream;
    int read = networkStream.EndRead(asyncResult);

    if (read == 0)
    {
        lock (clients)
        {
            clients.Remove(sc05BdClient);
            return;
        }
    }

    string data = Encoding.GetString(sc05BdClient.Buffer, 0, read);
    System.Diagnostics.Debug.Print(data);
    OnDataAvailable(this, new DataAvailableEventArgs(data));  <---- here Handler is called
    networkStream.BeginRead(sc05BdClient.Buffer, 0, sc05BdClient.Buffer.Length, ReadCallback, sc05BdClient);
}


public event EventHandler<DataAvailableEventArgs> DataAvailable;

protected virtual void OnDataAvailable(object sender, DataAvailableEventArgs e)
{
    EventHandler<DataAvailableEventArgs> handler = DataAvailable;
    if (handler != null)
        handler(sender, e);
}


public class DataAvailableEventArgs : EventArgs
{
    public string Data;

    public DataAvailableEventArgs(string data)
    {
        Data = data;
    }
}

主程序:

class Program
{
    static void Main()
    {
        Sc05BdServer sc05BdServer = new Sc05BdServer(IPAddress.Any, 2006);
        sc05BdServer.DataAvailable += sc05BdServer_DataAvailable;
        sc05BdServer.Start();

        Console.ReadKey();
        sc05BdServer.Stop();
    }

    static void sc05BdServer_DataAvailable(object sender, DataAvailableEventArgs e)
    {
       Console.WriteLine(e.Data);  <--- this is called once
    }
}

我认为它与线程有关 - 但我不知道如何使用它们.

Answer 1

您可能遇到某种竞争问题，尽管控制台应该不受此影响。检查这个问题，但请注意，我无法重现该问题：Strange behavior of Console.ReadKey() with multithreading