WCF点对点聊天

Question

我为一个WCF P2P聊天程序写了一些代码。

<services>
  <service name="PeerChat.Form1">
    <host>
      <baseAddresses>
        <add baseAddress="net.p2p://PeerChat/" />
      </baseAddresses>
    </host>
    <endpoint name="PeerChatEndPoint" address="" binding="netPeerTcpBinding" bindingConfiguration="BindingUnsecure"
       contract="PeerChat.IChatService" />
  </service>
</services>
<bindings>
  <netPeerTcpBinding>
    <binding name="BindingUnsecure">
      <resolver mode="Pnrp" />
      <security mode="None" />
    </binding>
  </netPeerTcpBinding>
</bindings>
<client>
  <endpoint
      name="PeerChatClientEndPoint"
      address="net.p2p://PeerChat/"
      binding="netPeerTcpBinding"
      bindingConfiguration="BindingUnsecure"
      contract="PeerChat.IChatService"
  />
</client>

然后我托管服务，如下所示：

[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
public partial class Form1 : Form, IChatService
{

    IChatService channel;
    ServiceHost host = null;
    ChannelFactory<IChatService> channelFactory = null;

    private void StartService()
    {
        //Instantiate new ServiceHost
        host = new ServiceHost(this);
        //Open ServiceHost
        host.Open();
        //Create a ChannelFactory and load the configuration setting
        channelFactory = new ChannelFactory<IChatService>("PeerChatClientEndPoint");
        channel = channelFactory.CreateChannel();
        //Lets others know that someone new has joined
        channel.SendMessage("Hello."+ Environment.NewLine);

        foreach (var cloud in Cloud.GetAvailableClouds())
        {
            textBox2.Text += cloud.Name + Environment.NewLine;
        }
    }
    private void StopService()
    {
        if (host != null)
        {
            channel.SendMessage("Bye." + Environment.NewLine);
            if (host.State != CommunicationState.Closed)
            {
                channelFactory.Close();
                host.Close();
            }
        }
    }

问题是我可以向程序的同一实例发送消息，但不能向另一个实例发送消息。Ie实例只接收自己的消息，不接收来自其他实例的消息。不确定是否是正确配置PNRP的问题？我在Windows7上测试过。

Answer 1

您不会碰巧有两个程序实例监听相同的端点，对吗？我不确定，但我怀疑可能发生的情况是，您的客户端应用程序首先在端点上注册自己，然后在第二个端点获得消息之前拦截到达该端点的所有消息。我建议尝试将第二个实例配置为在具有不同Uri的端点上启动。假设一个连接到net.p2p://PeerChatA/，另一个连接到net.p2p://PeerChatB/。