c# - Displaying progress dialog only if a task did not finish in specified time

Question

I have a little service that uploads an image, and I use it like this:

ImageInfo result = await service.UploadAsync(imagePath);

What I'd like to do is to display a progress dialog, but only if the upload operation takes more than, say, 2 seconds. After the upload is done, I want to close the progress dialog.

I made a crude solution using Task/ContinueWith, but I was hoping for a more "elegant" way.

How can I achieve this using async/await?

Answer 1

May be something like this?

var uploadTask = service.UploadAsync(imagePath);
var delayTask = Task.Delay(1000);//Your delay here
if (await Task.WhenAny(new[] { uploadTask, delayTask }) == delayTask)
{
    //Timed out ShowProgress
    ShowMyProgress();
    await uploadTask;//Wait until upload completes
    //Hide progress
    HideProgress();
}