April 2016
Intermediate to advanced
1536 pages
44h 2m
English
Content preview from Professional C# 6 and .NET Core 1.0
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CHAPTER 43 WebHooks and SignalR
What’s In This Chapter?
- Overview of SignalR
- Creating a SignalR hub
- Creating a SignalR client with HTML and JavaScript
- Creating a SignalR .NET client
- Using groups with SignalR
- Overview of WebHooks
- Creating WebHook receivers for GitHub and Dropbox
Wrox.com Code Downloads for This Chapter
The wrox.com code downloads for this chapter are found at www.wrox.com/go/professionalcsharp6 on the Download Code tab. The code for this chapter is divided into the following major examples:
- Chat Server using SignalR
- WPF Chat Client using SignalR
- SaaS WebHooks Receiver Sample
Overview
With .NET you can use events to get notifications. You can register an event handler method with an event, also known as subscribing to events, and as soon as the event is fired from another place, your method gets invoked. Events cannot be used with web applications.
Previous chapters have covered a lot about web applications and web services. What was common with these applications and services is that the request was always started from the client application. The client makes an HTTP request and receives a response.
What if the server has some news to tell? There’s nothing like events that you can subscribe to, or are there? With the web technologies you’ve seen so far, this can be resolved by the client polling for new information. The client has to make a request to the server to ask whether new information is available. Depending on the request interval defined, this ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.