ASP.NET Core 3 and React

Creating the SignalR real-time API endpoint

Before we can use our SignalR real-time API, we need to enable SignalR and define the path for the endpoint. Let's carry out the following steps in Startup.cs:

1. We'll start by referencing our SignalR hub with the following using statement:

using QandA.Hubs;

2. Add SignalR to our ASP.NET app by using the AddSignalR method in the services parameter in the ConfigureServices method:

public void ConfigureServices(IServiceCollection services){  ...   services.AddSignalR();}

3. The next step is to configure the request pipeline so that we can pass SignalR requests to our SignalR hub:

public void Configure(IApplicationBuilder app, IHostingEnvironment env){  ...   app.UseEndpoints(endpoints =>  { endpoints.MapControllers(); ...