SignalR Console app example

Question

Is there a small example of a console or winform app using signalR to send a message to a  net hub   I have tried the  net examples and have looked at the wiki but it is not making sense to me the relationship between the hub  net  and client console app   could not find an example of this   Does the app just need the address and name of hub to connect    If someone could provide a small tidbit of code showing the app connecting to a hub and sending  Hello World  or something that the  net hub receives     PS  I have a standard hub chat example which works well   if I try to assign a hub name in Cs to it   it stops working i e  HubName  test      do you know the reason for this    Thanks   Current Console app Code   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   gt                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   gt            if task IsFaulted                        Console WriteLine  There was an error calling send   0   task Exception GetBaseException                       else                       Console WriteLine  Send Complete                            Hub Server   different project workspace   public class Chat   Hub       public void Send string message                   Call the addMessage method on all clients         Clients addMessage message             Info Wiki for this is http   www asp net signalr overview signalr-20 hubs-api hubs-api-guide-net-client

User · Answer

This is for dot net core 2 1 - after a lot of trial and error I finally got this to work flawlessly   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      This code is from your typical SignalR poor man s chat client  The problem that I and what seems like a lot of other people have run into is establishing a connection before attempting to send a message to the hub  This is critical  so it is important to wait for the asynchronous task to complete - which means we are making it synchronous by waiting for the task to complete

User · Answer

First of all  you should install SignalR Host Self on the server application and SignalR Client on your client application by nuget       PM  Install-Package SignalR Hosting Self -Version 0 5 2      PM  Install-Package Microsoft AspNet SignalR Client   Then add the following code to your projects      run the projects as administrator   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                   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                                     Client console app   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   gt                    if  task IsFaulted                        Console WriteLine  There was an error opening the connection  0                                          task Exception GetBaseException                       else                       Console WriteLine  Connected                                      Wait                 myHub Invoke lt string gt   Send    HELLO World    ContinueWith task   gt                    if  task IsFaulted                        Console WriteLine  There was an error calling send   0                                          task Exception GetBaseException                       else                       Console WriteLine task Result                                                  myHub On lt string gt   addMessage   param   gt                    Console WriteLine param                                myHub Invoke lt string gt   DoSomething    I m doing something      Wait                  Console Read                connection Stop

User · Answer

To build on  dyslexicanaboko s answer for dotnet core  here is a client console application  Create a helper class  using System  using Microsoft AspNetCore SignalR Client   namespace com stackoverflow SignalRClientConsoleApp       public class SignalRConnection               public async void Start                         var url    quot http   signalr-server-url hubname quot                var connection   new HubConnectionBuilder                    WithUrl url                   WithAutomaticReconnect                    Build                    receive a message from the hub             connection On lt string  string gt   quot ReceiveMessage quot    user  message    gt  OnReceiveMessage user  message                 var t   connection StartAsync                 t Wait                    send a message to the hub             await connection InvokeAsync  quot SendMessage quot    quot ConsoleApp quot    quot Message from the console app quot                       private void OnReceiveMessage string user  string message                        Console WriteLine   quot  user    message  quot                        Then implement in your console app s entry point  using System   namespace com stackoverflow SignalRClientConsoleApp       class Program               static void Main string   args                        var signalRConnection   new SignalRConnection                signalRConnection Start                 Console Read

User · Answer

Example for SignalR 2 2 1  May 2017  Server Install-Package Microsoft AspNet SignalR SelfHost -Version 2 2 1  assembly  OwinStartup typeof Program Startup    namespace ConsoleApplication116 SignalRServer       class Program               static IDisposable SignalR           static void Main string   args                        string url    quot http   127 0 0 1 8088 quot               SignalR   WebApp Start url                Console ReadKey                       public class Startup                       public void Configuration IAppBuilder app                                app UseCors CorsOptions AllowAll                        CAMEL CASE  amp  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         gt  serializer                                                                     app MapSignalR                                      HubName  quot MyHub quot            public class MyHub   Hub                       public void Send string name  string message                                Clients All addMessage name  message                                    Client  almost the same as Mehrdad Bahrainy reply  Install-Package Microsoft AspNet SignalR Client -Version 2 2 1 namespace ConsoleApplication116 SignalRClient       class Program               private static void Main string   args                        var connection   new HubConnection  quot http   127 0 0 1 8088  quot                var myHub   connection CreateHubProxy  quot MyHub quot                 Console WriteLine  quot Enter your name quot                    string name   Console ReadLine                 connection Start   ContinueWith task   gt                    if  task IsFaulted                                        Console WriteLine  quot There was an error opening the connection  0  quot   task Exception GetBaseException                                       else                                       Console WriteLine  quot Connected quot                         myHub On lt string  string gt   quot addMessage quot    s1  s2    gt                            Console WriteLine s1    quot    quot    s2                                                while  true                                                Console WriteLine  quot Please Enter Message quot                            string message   Console ReadLine                             if  string IsNullOrEmpty message                                                         break                                                     myHub Invoke lt string gt   quot Send quot   name  message  ContinueWith task1   gt                                if  task1 IsFaulted                                                                Console WriteLine  quot There was an error calling send   0  quot   task1 Exception GetBaseException                                                               else                                                               Console WriteLine task1 Result                                                                                                                     Wait                 Console Read                connection Stop

User · Answer

The Self-Host now uses Owin  Checkout http   www asp net signalr overview signalr-20 getting-started-with-signalr-20 tutorial-signalr-20-self-host to setup the server  It s compatible with the client code above

[c#] SignalR Console app example

Examples related to c#

Examples related to signalr