How to Send Messages Between Console Applications Using SignalR?

Send Messages with SignalR in a Console App

SignalR enables real-time communication between a server and connected clients. To utilize SignalR, you'll need to install SignalR.Hosting.Self on the server application and SignalR.Client on the client application through NuGet.

Server Console App

using System;
using SignalR.Hubs;

namespace SignalR.Hosting.Self.Samples {
    class Program {
        static void Main(string[] args) {
            string url = "http://127.0.0.1:8088/";
            var server = new Server(url);

            server.MapHubs();
            server.Start();

            Console.WriteLine("Server running on {0}", url);

            while (true) {
                var key = Console.ReadKey(true);
                if (key.Key == ConsoleKey.X) {
                    break;
                }
            }
        }

        [HubName("CustomHub")]
        class MyHub : Hub {
            public string Send(string message) {
                return message;
            }

            public void DoSomething(string param) {
                Clients.addMessage(param);
            }
        }
    }
}

Client Console App

using System;
using SignalR.Client.Hubs;

namespace SignalRConsoleApp {
    internal class Program {
        static void Main(string[] args) {
            var connection = new HubConnection("http://127.0.0.1:8088/");
            var myHub = connection.CreateHubProxy("CustomHub");

            connection.Start().Wait();
            Console.WriteLine("Connected");

            myHub.Invoke<string>("Send", "HELLO World ").Wait();
            Console.WriteLine("Message sent.");

            myHub.On<string>("addMessage", param => Console.WriteLine(param));

            myHub.Invoke("DoSomething", "I'm doing something!!!").Wait();

            Console.Read();
            connection.Stop();
        }
    }
}

Additional Information

• Assign a custom hub name using [HubName("CustomName")] but note that using a standard hub name might cause compatibility issues.
• Run both projects as administrators.
• If you receive an "Unknown hub" error, ensure that both the hub name and the client proxy name match.

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