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Acr UserDialog ShowLoading within a Command

kenneth.leekenneth.lee USMember ✭✭✭
in Xamarin.Forms

I've been using ShowLoading and HideLoading throughout my app and they all work as intented however for one implementation I needed to show loading on click on a StackLayout which I have implemented like

        CheckOutStack.GestureRecognizers.Add((new TapGestureRecognizer
        {
            Command = new Command((o) =>
            {

                App.UserDialog.ShowLoading("sdsa");
                Task y = Task.Run(() =>
                {
                    for (int x = 0; x < 10000; x++) Debug.WriteLine("int x = " + x);
                });
                y.Wait();
                App.UserDialog.HideLoading();

                using (App.UserDialog.Loading("Loading..."))
                {
                    Debug.WriteLine("Start");
                    Task.Delay(9000);
                    Debug.WriteLine("End");
                }...

on both ShowLoading or Loading didn't bring up the loading overlay. My suspicion why it isn't working is because I'm doing it on a command because it has been working before outside of a command. However besides that I have no justification as to why.

Any help or discussion on the topic would be greatly appreciated

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Best Answers

  • NamyslawSzymaniukNamyslawSzymaniuk US ✭✭✭✭
    Accepted Answer

    For me it's working for, if my code inside is asynchronous - like:

    using (UserDialogs.Instance.Loading("Loading..."))
{
    async InvokeApi();
}
  • AllanRitchieAllanRitchie CA ✭✭✭
    Accepted Answer

    You aren't awaiting your task and then you go straight in .Wait which is blocking the main thread, so the loader can't get itself displayed.

Answers

  • NamyslawSzymaniukNamyslawSzymaniuk USMember ✭✭✭✭
    Accepted Answer

    For me it's working for, if my code inside is asynchronous - like:

    using (UserDialogs.Instance.Loading("Loading..."))
{
    async InvokeApi();
}
  • AllanRitchieAllanRitchie CAInsider, University ✭✭✭
    Accepted Answer

    You aren't awaiting your task and then you go straight in .Wait which is blocking the main thread, so the loader can't get itself displayed.

  • kenneth.leekenneth.lee USMember ✭✭✭

    Ah i see. I was under the impression starting a new task would be async and not block the main thread... makes me think i'm doing a whole bunch of stuff wrongly now but thanks guys that was a lot of help.

  • BhautikBhautik Member ✭✭✭

    @NamyslawSzymaniuk said:
    For me it's working for, if my code inside is asynchronous - like:

    using (UserDialogs.Instance.Loading("Loading..."))
{
  async InvokeApi();
}

    UserDialogs.Instance.Loading("Loading");

    Some API call

    UserDialogs.Instance.HideLoading();

    Is this correct way or must required async call?

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