By Keyvan Nayyeri
ASP.NET SignalR is the hot method to real-time communique among servers and consumers in .NET. Use it to push new facts to an internet web page or cellular equipment once it turns into to be had, even if it is a notification, dwell chat, up to date monetary facts, or various different intriguing purposes. ideas like Google stay seek and dwell fb and Twitter updates are pushing clients' expectancies of the real-time net. With professional ASP.NET SignalR, you could subscribe to this revolution and research abilities that might be worthy for future years. seasoned ASP.NET SignalR begins with an creation to the real-time internet. know about the applied sciences underlying the SignalR library, akin to WebSockets and long-polling, and the way SignalR elegantly flips among them looking on the services of the customer. subsequent, meet the strategies of hubs and protracted connections and the way to exploit them to construct the elements of an ASP.NET SignalR software. the best way to expand, try out, debug, configure, scale, and host your purposes, and the way to focus on quite a number consumers, together with home windows and iOS.
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Method N Method 1 Method 2 . . Method N Method 1 Method 2 . . Method N Figure 3-1. General hub structure How does it work in general? This question is critical: making calls from the client(s) to server is a fairly common task, but making calls from the server to a particular client (or all clients) is not. NET SignalR employs the concept of a persistent HTTP connection that is in contrast with the traditional HTTP connections that can be disconnected. NET SignalR server component to push any content that it wants to the client using this persistent connection.
Inside this class, we must implement a method called Configuration. Listing 3-4 shows such an implementation. You often need to use the same code and change the namespace only to reflect your assembly name. Listing 3-4. info Chapter 3 ■ Developing SignalR Applications Using Hubs ■■Note We host our SignalR applications in this chapter using OWIN. We will discuss this in detail, along with alternatives, in Chapter 8. NET server and web application. There can be different implementations of this standard to host a web application on different types of servers, such as Internet Information Services (IIS), among others.
Let’s modify our original broadcaster application to take advantage of this. We want to alter the functionality so it displays the name of the sender along with the message sent. To do this, we declare a custom type called Person (shown in Listing 3-14) that has two string properties for this purpose. Listing 3-14. info Chapter 3 ■ Developing SignalR Applications Using Hubs Now we can modify the hub class to get an instance of this object and then use these two properties to call a new version of the client-side method (see Listing 3-15).