SignalR 控制台应用程序示例

问题描述 投票：0回答：5

是否有一个使用 signalR 向 .net hub 发送消息的控制台或 winform 应用程序的小示例？我已经尝试过 .net 示例并查看了 wiki，但集线器（.net）和客户端（控制台应用程序）之间的关系对我来说没有意义（找不到这样的示例）。该应用程序是否只需要集线器的地址和名称即可连接？.

是否有人可以提供一小段代码来显示应用程序连接到集线器并发送“Hello World”或 .net 集线器收到的内容？

PS。我有一个标准的集线器聊天示例，效果很好，如果我尝试为其分配 Cs 中的集线器名称，它就会停止工作，即 [HubName("test")] ，你知道原因吗？.

谢谢。

当前控制台应用程序代码。

static void Main(string[] args)
{
    //Set connection
    var connection = new HubConnection("http://localhost:41627/");
    //Make proxy to hub based on hub name on server
    var myHub = connection.CreateProxy("chat");
    //Start connection
    connection.Start().ContinueWith(task =>
    {
        if (task.IsFaulted)
        {
            Console.WriteLine("There was an error opening the connection:{0}", task.Exception.GetBaseException());
        }
        else
        {
            Console.WriteLine("Connected");
        }
    }).Wait();

    //connection.StateChanged += connection_StateChanged;

    myHub.Invoke("Send", "HELLO World ").ContinueWith(task => {
        if(task.IsFaulted)
        {
            Console.WriteLine("There was an error calling send: {0}",task.Exception.GetBaseException());
        }
        else
        {
            Console.WriteLine("Send Complete.");
        }
    });
 }

集线器服务器。 （不同的项目工作区）

public class Chat : Hub
{
    public void Send(string message)
    {
        // Call the addMessage method on all clients
        Clients.addMessage(message);
    }
}

相关信息 Wiki 是 http://www.asp.net/signalr/overview/signalr-20/hubs-api/hubs-api-guide-net-client

c# signalr
5个回答
130
投票

首先，您应该通过 nuget 在服务器应用程序上安装 SignalR.Host.Self 并在客户端应用程序上安装 SignalR.Client :

PM> 安装包 SignalR.Hosting.Self -版本 0.5.2

PM> 安装包 Microsoft.AspNet.SignalR.Client

然后将以下代码添加到您的项目中;)

（以管理员身份运行项目）

服务器控制台应用程序：

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);

            // Map the default hub url (/signalr)
            server.MapHubs();

            // Start the server
            server.Start();

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

            // Keep going until somebody hits 'x'
            while (true) {
                ConsoleKeyInfo ki = Console.ReadKey(true);
                if (ki.Key == ConsoleKey.X) {
                    break;
                }
            }
        }

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

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

客户端控制台应用程序：

using System;
using SignalR.Client.Hubs;

namespace SignalRConsoleApp {
    internal class Program {
        private static void Main(string[] args) {
            //Set connection
            var connection = new HubConnection("http://127.0.0.1:8088/");
            //Make proxy to hub based on hub name on server
            var myHub = connection.CreateHubProxy("CustomHub");
            //Start connection

            connection.Start().ContinueWith(task => {
                if (task.IsFaulted) {
                    Console.WriteLine("There was an error opening the connection:{0}",
                                      task.Exception.GetBaseException());
                } else {
                    Console.WriteLine("Connected");
                }

            }).Wait();

            myHub.Invoke<string>("Send", "HELLO World ").ContinueWith(task => {
                if (task.IsFaulted) {
                    Console.WriteLine("There was an error calling send: {0}",
                                      task.Exception.GetBaseException());
                } else {
                    Console.WriteLine(task.Result);
                }
            });

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

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


            Console.Read();
            connection.Stop();
        }
    }
}
30
投票

SignalR 2.2.1 示例（2017 年 5 月）

服务器

安装包 Microsoft.AspNet.SignalR.SelfHost -版本 2.2.1

[assembly: OwinStartup(typeof(Program.Startup))]
namespace ConsoleApplication116_SignalRServer
{
    class Program
    {
        static IDisposable SignalR;

        static void Main(string[] args)
        {
            string url = "http://127.0.0.1:8088";
            SignalR = WebApp.Start(url);

            Console.ReadKey();
        }

        public class Startup
        {
            public void Configuration(IAppBuilder app)
            {
                app.UseCors(CorsOptions.AllowAll);

                /*  CAMEL CASE & JSON DATE FORMATTING
                 use SignalRContractResolver from
                https://stackoverflow.com/questions/30005575/signalr-use-camel-case

                var settings = new JsonSerializerSettings()
                {
                    DateFormatHandling = DateFormatHandling.IsoDateFormat,
                    DateTimeZoneHandling = DateTimeZoneHandling.Utc
                };

                settings.ContractResolver = new SignalRContractResolver();
                var serializer = JsonSerializer.Create(settings);
                  
               GlobalHost.DependencyResolver.Register(typeof(JsonSerializer),  () => serializer);                
            
                 */

                app.MapSignalR();
            }
        }

        [HubName("MyHub")]
        public class MyHub : Hub
        {
            public void Send(string name, string message)
            {
                Clients.All.addMessage(name, message);
            }
        }
    }
}

客户

（与Mehrdad Bahrainy的回复几乎相同）

安装包 Microsoft.AspNet.SignalR.Client -版本 2.2.1

namespace ConsoleApplication116_SignalRClient
{
    class Program
    {
        private static void Main(string[] args)
        {
            var connection = new HubConnection("http://127.0.0.1:8088/");
            var myHub = connection.CreateHubProxy("MyHub");

            Console.WriteLine("Enter your name");    
            string name = Console.ReadLine();

            connection.Start().ContinueWith(task => {
                if (task.IsFaulted)
                {
                    Console.WriteLine("There was an error opening the connection:{0}", task.Exception.GetBaseException());
                }
                else
                {
                    Console.WriteLine("Connected");

                    myHub.On<string, string>("addMessage", (s1, s2) => {
                        Console.WriteLine(s1 + ": " + s2);
                    });

                    while (true)
                    {
                        Console.WriteLine("Please Enter Message");
                        string message = Console.ReadLine();

                        if (string.IsNullOrEmpty(message))
                        {
                            break;
                        }

                        myHub.Invoke<string>("Send", name, message).ContinueWith(task1 => {
                            if (task1.IsFaulted)
                            {
                                Console.WriteLine("There was an error calling send: {0}", task1.Exception.GetBaseException());
                            }
                            else
                            {
                                Console.WriteLine(task1.Result);
                            }
                        });
                    }
                }

            }).Wait();

            Console.Read();
            connection.Stop();
        }
    }
}
14
投票

为了构建 @dyslexicanaboko 对 dotnet core 的答案，这里是一个客户端控制台应用程序：

创建一个辅助类：

using System;
using Microsoft.AspNetCore.SignalR.Client;

namespace com.stackoverflow.SignalRClientConsoleApp
{
    public class SignalRConnection
    {
        public async Task Start()
        {
            var url = "http://signalr-server-url/hubname";

            var connection = new HubConnectionBuilder()
                .WithUrl(url)
                .WithAutomaticReconnect()
                .Build();

            // receive a message from the hub
            connection.On<string, string>("ReceiveMessage", OnReceiveMessage);

            await connection.StartAsync();

            // send a message to the hub
            await connection.InvokeAsync("SendMessage", "ConsoleApp", "Message from the console app");
        }

        private void OnReceiveMessage(string user, string message)
        {
            Console.WriteLine($"{user}: {message}");
        }

    }
}

然后在控制台应用程序的入口点中实现：

using System;

namespace com.stackoverflow.SignalRClientConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var signalRConnection = new SignalRConnection();
            signalRConnection.Start();

            Console.Read();
        }
    }
}
8
投票

自托管现在使用 Owin。查看 http://www.asp.net/signalr/overview/signalr-20/getting-started-with-signalr-20/tutorial-signalr-20-self-host 来设置服务器。它与上面的客户端代码兼容。

5
投票

这是针对 dot net core 2.1 的 - 经过大量的试验和错误，我终于让它完美地工作了：

var url = "Hub URL goes here";

var connection = new HubConnectionBuilder()
    .WithUrl($"{url}")
    .WithAutomaticReconnect() //I don't think this is totally required, but can't hurt either
    .Build();

//Start the connection
var t = connection.StartAsync();

//Wait for the connection to complete
t.Wait();

//Make your call - but in this case don't wait for a response 
//if your goal is to set it and forget it
await connection.InvokeAsync("SendMessage", "User-Server", "Message from the server");

此代码来自典型的 SignalR 穷人聊天客户端。我和许多其他人遇到的问题是在尝试向集线器发送消息之前建立连接。这很关键，因此等待异步任务完成非常重要 - 这意味着我们通过等待任务完成来使其同步。

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