It tells the compiler that we are going to use the await keyword in this method. The async keyword has one other function that I will explain shortly. On line 6 you see the new await keyword, it should be place before the expression that returns a task. After the await keyword you can see that we can use the result in our code as if there is no multi threading going on!
These keywords are newly added to C 5. In a nut shell, this new feature is a simplified way of improving the performance of the app and making it more responsive to the user without the complexity of writing code to use multiple threads.
The app can then continue executing, and can even exit out of method contexts. Another word for this in computer programming terminology is a "promise". Under the hood, when you compile this source code, the Compiler picks apart the source code and implements a complex series of statements in the Intermediate Language to allow this to happen flawlessly and it does it without the use of multiple threads in most cases.
Async is best used for operations that have a high degree of latency, but are not compute writing awaitable methods. That could take a second, or two, or three, which is an eternity in computing.
Contrast that to a compute-intensive operation such as a photo filter app that must take a large image from the camera and run complex mathematical algorithms to change the colors or the position of each pixel in the image.
This type of operation is known as "CPU Bound". This is NOT a good use of async. In this case, you would want to consider a Background Worker which helps to manage threads on the Windows Phone platform. If you are developing in. NET, you may prefer to work with threading via the Task Parallel Library instead, or revert back to managing threads manually, which has been an option since the very earliest versions of.
If you want to learn a little more about async and how it applies to the Windows RunTime, check out: Working with Async Methods in the Windows Runtime https: But back to the topic at hand GetStringAsync operation to complete. The thread of execution can continue on through the other lines of code until it absolutely must have the results of that operation.
Now, in our case, we attempt to call JsonConvert. However, we must still use the await keyword because the HttpClient. That method requires we await. If the method is void, it will merely be marked void in the method signature.
Therefore, take a look at the method that calls our FlickrImage. GetFlickrImages was forced to be await-able since it used the HttpClient. Since this is what they refer to as a "top level method", the chain of adding async stops here.
Again, remind me, why are we doing all of this? In hopes of making our app more responsive.It is very simple especially in case when the class contains only single awaitable method.
Every awaitable method requires its own class otherwise. The class MessageWebSocket does not contain any asynchronous method for reading incoming messages. It is designed for event-driven programming.
This proposal aims to answer that need by making writing explicitly asynchronous, concurrent Python code easier and more Pythonic. __aiter__ was expected to return an awaitable resolving to an asynchronous iterator.
An asynchronous context manager is a context manager that is able to suspend execution in its enter and exit methods. To. Most people have already heard about the new “async” and “await” functionality coming in Visual Studio This is Yet Another Introductory Post.
I’ve only had to write a couple of awaitables in the entire time I’ve used async/await.
it is the type that is awaitable, not the method returning the type. In other words, you can. I'm writing a network-bound application based on await/sleep paradigm. Sometimes, connection errors happen, and in my experience it pays to wait for some time and than retry operation.
Tag: awaitable Using the OData Async Extension Method for LoadAsync I posted a few months back about Phani’s OData async extension methods that convert the begin/end async pattern of the WCF Data Services client library into methods that support the new (and much easier) async/await pattern introduced skybox2008.com Framework Play Part 19 - Understanding async and Awaitable Tasks.
user without the complexity of writing code to use multiple threads.
methods in the Phone API use awaitable tasks to make ensure.