Run an IHostedService function during the Start of application but only once

Question

I have a need to run a function only once every time the application start (the function checks for a particular Mongo collection in my DB and insert in documents that are predefined by myself).

IHostedService/BackgroundService seemingly was able to do the job. I just need to inject the service into my Startup.cs file.

However, I was wondering if there are anyways that I can gracefully achieve this task since IHostedService is really made to implement more of a cron job (a task that needs to run in an interval of time say, every 30 minutes).

Thank you.

Answer 1

I was able to achieve what I want just by using IHostedService.

protected override async Task ExecuteAsync(CancellationToken cancellationToken)
        {
            //logic
        }

And in Startup.cs this is how I register my service.

AddSingleton<IHostedService, myService>

I ran my application and it debug into the AddSingleton line and only run the ExecuteAsync function once. So that is my solution.