调用后.net远程关闭与服务器的连接

Question

I am very new to .NET remoting. We have an MVC website making call to a Windows application using TCP connection (.NET remoting). There is a timer running every 30 seconds which makes a call via TCP, but after it finishes, the connection still remains established. As a result, after a few days, the server is throwing an exception because all ports are used up. Then we have to restart the app pool to resolve the issue. I am not sure how can we close the port after use, so that we can use it again. We have a lot of users for the site.

Below is the client side code to register a channel

        bool Registered = false;

        foreach (IChannel ic in ChannelServices.RegisteredChannels)
        {
            if (ic.ChannelName == ChannelNameRemoting)
            {
                return ic;
            }
        }

        // Channel not found yet


        IDictionary channelConfig = new Hashtable();
        channelConfig["name"] = ChannelNameRemoting;
        channelConfig["secure"] = false;

        BinaryClientFormatterSinkProvider defaultClientSink = new BinaryClientFormatterSinkProvider();

        if (remotingSinkProvider == null)
        {
            remotingSinkProvider = new CustomClientChannelSinkProvider();

            remotingSinkProvider.EncodingDecodingProviderEvent
                += new CustomClientChannelSinkProvider.EncodingDecodingProviderDelegate(remotingSinkProvider_EncodingDecodingProviderEvent);
        }

        defaultClientSink.Next = remotingSinkProvider;

        IChannel channel = new TcpChannel(channelConfig, defaultClientSink, null);

        if (!Registered)
        {
            ChannelServices.RegisterChannel(channel, false);

        }

        return channel;

Below call will create a connection to connect to the server in timer.

var connection = (testConnect)Activator.GetObject(
                                      typeof(testConnect),
                                      "tcp://" + _remotingUrl + ":" + _remotingPort + "/test/test4"
                              );

connection.FunctionCall();

Answer 1

I guess you need to UnRegister you channel. Please check the link

So ultimately we create the instance of TcpChannel and register it to channel service, and then finally return it to parent method, so that can use and can make the call. in the file/class where you have method that return the channel instance should also have another method to unregister the tcp channel, and once you are done with the call, you need to call this new methd to unregister the channel, and that will close the connection.

public void UnregisterMyTcpChannel(TcpChannel yourChannelInstance)
{
   ChannelServices.UnregisterChannel(yourChannelInstance);
}