#Aasync xmlreader how to#

For now, let’s just forget the await in GetGreetingsAsync() method which is used to just simulate a thread blocking process like reading a file in network share. Since, they are async methods, the compiler calls the method and returns a Task object without waiting for its completion.

For easy understanding, i will just make a delay of 10 seconds by calling Task.Delay(). This method(GetGreetingsAsync()) represents (actually simulates) a thread blocking operation or an I/O call which can make the current thread to potentially wait if it is synchronous method.

When the request arrives and the GreetAsync() method is called, the asynchronous call is made when the compiler calls GetGreetingsAsync() method. Public async static Task GetGreetingsAsync()Īs you can see, the asynchronous methods are decorated by using async modifier. All work completed, wait for async method to completeĬonsole.WriteLine('Async method completed!') Ĭonsole.WriteLine('Async method output: ' + greetMsg.Result) Ĭonsole.WriteLine('Async Application Ended!') Do your other stuffs synchronously while async method is in progressĬonsole.WriteLine('Async Method in started.') Ĭonsole.WriteLine('Current Time: ' + DateTime.Now) Ĭonsole.WriteLine('Awaiting result from Async method.')

Include namespace for writing asynchronous methods.Ĭonsole.WriteLine('Async Application Started!') For simplicity, we will just simulate a long running process inside the asynchronous method using Task.Delay(). Let’s build a simple async methods that greets us with a welcome message. Let’s move ahead and implement a very simple method to demonstrate asynchronous methods. It is a recommended practise to name the asynchronous methods with ending string as Async (Write Async(), Read Async()). Void is also a valid return type and it is used for asynchronous event handlers.Įvery async method should include at least one await operator in the method body to take the advantage of asynchronous programming. If the method does not return any values then the return type is just Task. If the method has any return types they are enclosed as part of Task object. The compiler takes the complexity part and takes care of everything when we use async and await for asynchronous methods.Īn async method is represented by using async modifier in the method signature. It does not change programming structure like the old models (APM and EAP) and the resultant asynchronous method look similar to synchronous methods. The biggest advantage of using async and await is, it is very simple and the asynchronous method looks very similar to a normal synchronous methods.

#Aasync xmlreader how to#

How to use async and await for Asynchronous Programming? Let’s see how async and await helps us to implement asynchronous methods in a more simpler way. Though, these approaches worked well but they are not easier to implement. For example, there was an asynchronous method called WebClient.DownloadStringAsync with an associated event WebClient.DownloadStringCompleted for downloading webpage contents. Similarly, there was another methodology called Event-based asynchronous pattern (EAP) which approached asynchronous model as event based model. NetFramework 2.0, the ADO.Net ExecuteReader() method has a APM counterparts methods BeginExecuteReader() and EndExecuteReader(). Initially, there was a paradigm called Asynchronous Programming Model (referred as APM) which exposed long running framework API methods with pair of begin and end methods. NetFramework had support for asynchronous programming but it was too complicated to understand and implement. NetFramework 4.5 which introduced async and await keywords. Asynchronous programming model is simplified so much with the release of.