Bug 25473 - await DisplayAlert not working with Xamarin.Forms in Windows Phone
Summary: await DisplayAlert not working with Xamarin.Forms in Windows Phone
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.2.3
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2014-12-17 09:59 UTC by Anubhav Ranjan
Modified: 2015-07-31 06:13 UTC (History)
8 users (show)

Is this bug a regression?: ---
Last known good build:

it is a sample to show bug on winphone (77 bytes, text/plain)
2014-12-18 00:15 UTC, Elvin

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Description Anubhav Ranjan 2014-12-17 09:59:07 UTC
One of our customer is facing issue with DisplayAlert when using Xamarin.Forms in Windows Phone

###Actual Result:
When Logout Button is clicked, the application just logs out without waiting for the user response.
However, the AlertDialog keeps on showing since it's waiting for the response.

###Expected Result:
When Logout Button is clicked, the application should wait for the user response.

###Sample Code:
            var logoutButton = new Button { Text = "Logout" };
            logoutButton.Clicked += async (sender, e) =>
                var answer = await DisplayAlert("das", "das", "yes", "no");
                if (answer)

            Content = new StackLayout
                BackgroundColor = Color.Gray,
                VerticalOptions = LayoutOptions.FillAndExpand,
                Children = {
Comment 2 Elvin 2014-12-18 00:15:48 UTC
Created attachment 9116 [details]
it is a sample to show bug on winphone

This attached LoginDemo project is absolutely token the Xamarin-samples project. Just added code that show DisplayAlert to user when clicking logout button.
Comment 3 Ram Chandra 2015-01-05 11:11:37 UTC
I have checked this issue and with the help of attached sample I am able to reproduce this issue.

Steps to reproduce:

1. Download the attached sample.
2. Build and deploy the sample.
3. log in with any credentials
4. Tap the log-out button

When I press the log out button on device/emulator, I observed that the application just logs out without waiting for the user response. 

Screencast: http://www.screencast.com/t/QHmKCO5mjMu

Debug logs: https://gist.github.com/RamChBachkheti/99b245c906048c52dcb2
IDE logs: https://gist.github.com/RamChBachkheti/4da402b936a72e646b38

Additional Info: I am getting this behavior with both device and emulator.I am not getting this behavior for android.

Please let me know if I can provide more info to this issue.

Environment Info:

Microsoft Visual Studio Professional 2013
Version 12.0.30723.00 Update 3
Microsoft .NET Framework
Version 4.5.51641
Installed Version: Professional
Xamarin (10cfd178d55287f09c85f5a1e604dfe20889a40f)
Xamarin.Android (ba9bbbdd44cfdc4bf485e8885bd2ad24fba525f7)
Xamarin.iOS (840a925103a0bf4a856507f13d5eaee3c1579c2f)
Xamarin.iOS Unified Migration   1.0
Comment 4 Jason Smith [MSFT] 2015-02-13 06:56:27 UTC
We can no longer reproduce this in 1.3.4. If you still have issues please re-open
Comment 5 Elvin 2015-02-16 05:36:42 UTC
i updated my project to 1.3.4. But still have issue.

Please fix this issue. I can not upload my WP project for this reason.
Comment 6 Elvin 2015-02-16 05:38:56 UTC
and i could not open issue again. What to do me? Re create it?
Comment 7 Anubhav Ranjan 2015-02-16 07:05:17 UTC
Elvin, can you please attach the sample project where the issue is reproducible?
Comment 8 Elvin 2015-02-16 07:12:36 UTC
Ranjan, i have attached sample still. You can see it in the Attachments section...
Comment 9 J.C.Ködel 2015-04-14 20:13:31 UTC
Happening again in
Comment 10 Elvin 2015-04-15 07:53:32 UTC
Happening in last releases. Will be it fixed?
If you see that it is not fixable bug so advise me alternative way.
Note that for this bug i must change all my project.
Comment 11 Elvin 2015-04-24 02:26:31 UTC
Brothers and sisters, can anyone answer me about this bug? It is critical bug. Please provide solution
Comment 12 Adam 2015-05-16 11:01:13 UTC
This happens only when you change the MainPage in Windows Phone. I can confirm it exists in the latest release of Xamarin.Forms.
Comment 13 Niels 2015-06-24 09:42:57 UTC
I can confirm this bug being present in 1.4.2. await DisplayAlert instantly returns false for me, without having clicked on a button.
Comment 14 Adam 2015-06-25 01:01:55 UTC
This bug is a duplicate of https://bugzilla.xamarin.com/show_bug.cgi?id=27119

Which has just been marked as resolved and will be available in 1.4.4-pre1

DisplayActionSheet and DisplayAlert were both doing the same thing.
Comment 15 Elvin 2015-07-31 06:13:32 UTC
Bug fixed on 1.4.4. Thanks