The name GlobalHost does not exist in this context

Question

User-595439866 posted

public static void NotifyUI(string msg, int count)
{
var message = "Process completed for " + msg;
var hubContext = GlobalHost.ConnectionManager.GetHubContext<Chat>();
hubContext.Clients.All.sendMessage(string.Format(message), count);

}

i am getting error on GlobalHost does not exist in this context while tring to call hub class method from controller

Answer 1

User-335504541 posted

Hi Altaf11221,

Altaf11221

GlobalHost does not exist in this context

The GlobalHost's namespace is Microsoft.AspNet.SignalR.

Do you add reference in your controller ?

using Microsoft.AspNet.SignalR;

You could install it by using

install-package Microsoft.AspNet.SignalR

in Package Manager Console.

Best Regards,

Billy

Answer 2

User-595439866 posted

Yes i have installed

using Microsoft.AspNetCore.SignalR;

Answer 3

User-335504541 posted

Hi Altaf111221,

I have tried to call the code in a controller, it works fine.

Do you have any other error message in your project? What's the version of the SignalR you are using?

Could you use GlobalHost in other place such as your hub class?

Best Regards,

Billy

Answer 4

User-595439866 posted

i am signalr with asp.net core with the following 

using Microsoft.AspNetCore.SignalR;

Answer 5

User61956409 posted

Hi Altaf11221,

I install Gray.Microsoft.AspNetCore.SignalR.Server in my .net core web application, and I can execute the following code in controller action to broadcast message to connecting clients.

IHubContext hubContext = Startup.ConnectionManager.GetHubContext<ChatHub>();
 
hubContext.Clients.All.addNewMessageToPage("robot", "hi");

 

And the following is my Startup.cs

public class Startup
{
    public Startup(IHostingEnvironment env)
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(env.ContentRootPath)
            .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
            .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
            .AddEnvironmentVariables();
        Configuration = builder.Build();
    }

    public IConfigurationRoot Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        // Add framework services.
        services.AddMvc();
        services.AddSignalR(options=> {
            options.Hubs.EnableDetailedErrors = true;
        });
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.

    public static IConnectionManager ConnectionManager;

    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IServiceProvider serviceProvider)
    {
        loggerFactory.AddConsole(Configuration.GetSection("Logging"));
        loggerFactory.AddDebug();

        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
            app.UseBrowserLink();
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");
        }

        app.UseStaticFiles();
        app.UseWebSockets();
        app.UseSignalR();
        ConnectionManager = serviceProvider.GetService<IConnectionManager>();

        app.UseMvc(routes =>
        {
            routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");
        });
    }
}

With Regards,

Fei Han