Advanced content on Dispatcher

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Hello ,

I am looking for a complete talk on Dispatcher in WPF, like what it is, how many disptacher can exist in a single application and all other details. I am googling it but only basics are there. Not able to find any book or post with too much details on Dispatcher.

Posted 4-Sep-15 9:34am

Vishal.KumarSingh

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Afzaal Ahmad Zeeshan 4-Sep-15 16:18pm

That is why Larry Page invented Google, so that you can search for good content on the internet. :-)

Sergey Alexandrovich Kryukov 4-Sep-15 16:28pm

The question itself is pretty interesting, but what's preventing you for finding out?
—SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-09-04T10:27:00

The instances of System.Windows.Threading.Dispatcher are created per thread. The property Dispatcher.CurrentDispatcher returns an instance associated with the calling thread, creating one of it was not yet created before, according the lazy initialization pattern. Please see:
https://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.currentdispatcher%28v=vs.110%29.aspx[^],
https://en.wikipedia.org/wiki/Lazy_initialization[^].

It's easy to check up that the references obtained reference different objects if you do it in different threads. You can call this property from several different threads, including the UI thread, and check up the references using System.Object.ReferenceEquals. You will see that the Dispatcher objects are referentially different.

—SA