![]() ![]() Public class BackgroundPrinter : IHostedService, IDisposable Thirdly, for the Timer delegate, I will define an anonymous function, where I will increment and print the integer number using ILogger defined as a class-level variable.įourthly, I will set the timer to run in a 5-second interval.įinally, I will implement the IDisposable interface and implement the Dispose method to call the Timer object’s Dispose method. Secondly, inside the StartAsync I will create a new instance of the Timer. And on a timer interval, I will print out the incremented number.įirstly, I will declare a Timer object and an integer variable number in the class. ![]() IHostedService implementation with Timer objectįor the first version of the code, I will implement a Timer inside the BackgroundPrinter class. Secondly, the StartAsync method is called before the server is startedįinally, if the class implementing IHostedService uses any unmanaged object, the class has to implement IDisposable interface for disposing off the unmanaged objects.Firstly, the StartAsync method is called by the framework before the Configure method of the Startup class is called.Whereas the StopAsync method is where we should implement logic while the task is stopped.Ī couple of important point to remember about the StartAsync method: The StartAsync method is where the task should be started. The IHostedService interface provides two methods, StartAsync and StopAsync. This class will implement the IHostedService interface. To achieve this I will create a new class BackgroundPrinter. It will print an incrementing integer number. Now that the project is ready, it is time to create our first background tasks.įor creating a continuously running background task, let us consider we have a printing process. Secondly, we can derive from BackgroundService abstract base class. ![]() Firstly, we can implement IHostedService interface.Two ways of running Background tasksĪs I mentioned earlier, we can run background tasks in ASP.NET Core in using two different constructs provided by the ASP.NET Core framework. And I will keep other values default (ASP.Net Core 3.1) and click on the Create button. Thirdly, on the next page, I will provide the name of the application as BackgroundTask.Demo and click on the Create button.įinally, on the final page, I will select the API template option. Secondly, in the Create a new Project popup window, I will select ASP.NET Core Web Application from the project template and click on the Next button. This will open the Create a new Project project popup window. Once Visual Studio opens up, I will select the menu File -> New -> Project. To start this example, first of all I will create a new ASP.NET Core Web API Application.įirstly, to do that, I will open up Visual Studio 2019. We do not need any external NuGet package for implementing these background tasks. Both of the ways are provided out of the box by the ASP.Net core framework. In this blog post, I am going to cover two main ways of running background tasks in ASP.Net Core web applications. Often times, we create our own interface and classes and wire them up somehow in the Startup class to achieve this functionality. There are a lot of scenarios where you want to run a task continuously in the background. In this blog post, I am going to walk through how to run background tasks in ASP.Net Core Web applications using infrastructure and API provided by the ASP.Net Core framework. ![]()
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