Maui- app.cs write in constructor http call

Question

Hi,

I need to write http call asynchronously and i have only constructor their.

Is not allowed to make asynchronous call in constructor?

Thanks,

Answer 1

Hello,

Is not allowed to make asynchronous call in constructor?

It's not allowed.

You have a http call, and you might have to send an HTTP request as an asynchronous operation, then receive the response by using async and await.

app constructor is not an async method, and the 'await' operator can only be used within an async method, so it's not allowed.

It's suggested that you make the asynchronous call in App's lifecycle events, Page.OnAppearing Method, or VisualElement.Loaded Event.

Update

I can't make the asynchronous call in App's lifecycle events, Page.OnAppearing Method, So i will make synchronous in app ctor?

Yes, you could try. But I'm not sure how large the synchronous task would be, the risk of blocking UI thread is high. app constructor runs before app launch, your app might be blank for a while.

Best Regards,

Wenyan Zhang

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.