SignalR Overview
Explore how SignalR facilitates real-time bi-directional communication between servers and clients in ASP.NET Core applications. Understand the structure and implementation of SignalR hubs, client connections, and message handling to build interactive web features like chat and live updates.
We'll cover the following...
SignalR is a .NET library for building interactive web applications that enable two-way communication between the server and clients. It simplifies the process of adding real-time web functionality to applications by handling the low-level details of managing connections between clients and servers.
By using SignalR, developers can create applications that enable server-side code to push content to connected clients instantly as events occur, rather than relying on the traditional request-response model. It supports various transports, including WebSockets, Server-Sent Events (SSE), and Long Polling.
SignalR can be used in a variety of scenarios, such as chat applications, real-time dashboards, live data updates, collaborative editing, gaming applications, and more. It's a powerful tool for creating interactive, real-time experiences on the web.
SignalR project structure
The following playground contains an application with both the SignalR server and client components:
using Microsoft.AspNetCore.SignalR;
namespace DemoApp;
public class DemoHub : Hub
{
public async Task BroadcastMessage(string message)
{
await Clients.All.SendAsync("ReceiveMessage", message);
}
}If we launch this application, here is what we will see on the home page once it is built:
We can type a message in the text box that is delivered ...