By Roberto Vespa
SignalR is a up to date addition to ASP.NET, which lets you upload real-time functionalities in your purposes. SignalR allows bidirectional verbal exchange among consumer and server over HTTP, transparently, and guarantees you're constantly supplied with the adventure of a power connection.
SignalR Real-time software Cookbook is a pragmatic, hands-on consultant that offers a few transparent step by step recipes that might steadily assist you upload SignalR as an cutting edge, potent, and important merchandise on your toolbox. This ebook will circulate from basic examples directly to complicated use instances, facing a complete evaluate of the library. except assisting out with the typical initiatives, on the finish of the booklet you will discover a suite of ready-made options for extra advanced situations.
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Extra info for SignalR Real-time Application Cookbook
Example text
Note that say is written in lowercase here. Regardless of the actual name on the server-side Hub, in a JavaScript context, SignalR automatically generates camel case names in order to provide a more idiomatic JavaScript API. When launching the application from Visual Studio, a browser window will open, the page will be loaded, and the Say() method of the EchoHub class will execute as soon as the page is completely loaded. NET application In the context of the Adding a Hub to a self-hosting application recipe, we already mentioned that SignalR can be used in the context of a generic standalone process, and we detailed how this can be leveraged for the server-side portion of an application.
The function will append every received message to a ul list present on the page and marked with an id attribute whose value is messages. ff We then start the connection and when it's ready, we hook the click event of the subscribe button to the action of calling the subscribe() method on the echo hub through the server member of the hub proxy. ff After calling subscribe(), we set up the click event of the send button to call the Send() method on the echo hub. Both subscribe() and Send() target the same destination group, but this is just the way this sample is built; of course, it does not have to be like that.
Ff When the initialization call has been completed, we print a message and then wait for someone to press Enter; this is important to keep our console application alive. Without it, the process would immediately end and the server would go away. Our self-hosting process is now ready to be used. When launched, it will wait for clients to connect and call the Say() method on the EchoHub Hub. At each call, we would notice a Hello SignalR! message printed on the Output debug window by the Trace. WriteLine(message); call inside the Say() method.