SignalR in .NET Core: Real-Time Web Applications

SignalR makes real-time web communication easy. Notifications, chat, live dashboards—all with minimal code.

Server Hub

public class ChatHub : Hub
{
    public async Task SendMessage(string user, string message)
    {
        await Clients.All.SendAsync("ReceiveMessage", user, message);
    }
}

Startup Configuration

services.AddSignalR();

app.UseEndpoints(endpoints =>
{
    endpoints.MapHub<ChatHub>("/chatHub");
});

JavaScript Client

const connection = new signalR.HubConnectionBuilder()
    .withUrl("/chatHub")
    .build();

connection.on("ReceiveMessage", (user, message) => {
    console.log(`${user}: ${message}`);
});

await connection.start();
await connection.invoke("SendMessage", "John", "Hello!");

References

• SignalR Documentation