[Scenario Day] Picker SelectedIndex property not working

[jsuarezruiz]

Description

Picker SelectedIndex property not working.

<Picker Title="Select a monkey"
            SelectedIndex="3">
        <Picker.Items>
            <x:String>Baboon</x:String>
            <x:String>Capuchin Monkey</x:String>
            <x:String>Blue Monkey</x:String>
            <x:String>Squirrel Monkey</x:String>
            <x:String>Golden Lion Tamarin</x:String>
            <x:String>Howler Monkey</x:String>
            <x:String>Japanese Macaque</x:String>
        </Picker.Items>
    </Picker>

Steps to Reproduce

1. Create a new .NET MAUI from template.
2. Paste the previous piece of code.
3. Launch the App.

Version with bug

Release Candidate 3 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android, Windows

Affected platform versions

Windows SDK 10.0.17134.0, Android 11

Did you find any workaround?

No response

Relevant log output

No response

[XamlTest]

Verified this issue with Visual Studio Enterprise 17.3.0 Preview 1.0 [32427.455.main]. Not repro on Windows and Android 12. Sample Project: 7138.zip

Windows:

Android:

[hafzaal]

@XamlTest This doesn't seem to be working on VS community 17.3.0 preview 2. I downloaded the project you linked and I'm getting this:

Pixel 5 Android 12.0:

Windows:

[WdeBruin]

I think this is the same issue as #9150

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[KarthikRajaKalaimani]

Still the issue presist in .Net 7.0 sample and Microsoft Visual Studio Professional 2022 (64-bit) - Preview
Version 17.6.0 Preview 1.0.

[XamlTest]

Verified this on Visual Studio Enterprise 17.6.0 Preview 6.0. Repro on Windows 11 and Android emulator (13.0-API 33) with Project: 7138.zip

Android:

Windows:

[StephaneDelcroix]

I think it's a matter of declaration order. Xaml respects the order in which you set the properties, and in the snippet the selected index is set before the items, at a time there are no items, and is probably coerced back to 0 or -1.

[MacrayBlackhand]

I'm having this issue as well. I suspect it is due to the fact that I make async calls to populate the ObservableCollections bound to the Pickers and the response just isn't back when the Picker is rendered and the SelectedIndex is trying to be set.

We need an event exposed when the ItemSource is bound or populated or something like that.