ComboBox incorrect behavior when using Items property

[jeromelaban]

Using this simple sample, the list is modified at each selection:

<ComboBox>
	<ComboBoxItem>Value 1</ComboBoxItem>
	<ComboBoxItem>Value 2</ComboBoxItem>
	<ComboBoxItem>Value 3</ComboBoxItem>
</ComboBox>

Observed with Uno.UI 1.31.0-dev.94.

[double28]

in android,the last selected item dispeared! in ios,no item show!

[leboeuf]

Here the items are of type ComboBoxItem, which is a view.
Since views can only have one parent, when ComboBox.UpdateContentPresenter() sets its _contentPresenter.Content to the SelectedItem, the parent of the item becomes that ContentPresenter, which explains why it's not in the dropdown list anymore.

One option would be to implement in Uno the specifics of CarouselPanel that make the dropdown expand around the selected item (if we want the same behavior as UWP).
If you simply want to display strings in your ComboBox I suggest that you use the ItemsSource attribute instead of creating ComboBoxItems manually.

[double28]

In android,i can define a ItemTemplate of ComboBox,then the behaviour of ComboBox is well.
In IOS, it's not work still! I define a List as the ItemsSource value,it's still show nothing.

@jeromelaban ,do you know How to deal with it? Thank you!

[XiaotianNetlift]

If you need to set the choices in xaml, you can use the primitives literals as a temporary workaround:

<ComboBox>
    <x:String>Red</x:String>
    <x:String>Green</x:String>
    <x:String>Blue</x:String>
</ComboBox>

Using a list for ItemsSource should work on both on ios & android. And, depending on what type of the list you get, you might need to set the DisplayMemberPath.