xamarin radio buttons not displaying - xamarin.forms

Question

I have a content page with the following data template for RadioButtons:
<DataTemplate x:Key="RadioTemplate">
<StackLayout Padding="0,2,0,0">
<StackLayout
Orientation="Horizontal" >
<Label
Text="{Binding Title}"
Style="{StaticResource LabelStyle}">
</Label>
<ImageButton HorizontalOptions="Center"
CornerRadius="6"
VerticalOptions="Center"
Clicked="HelpButton_Clicked"
HeightRequest="12"
WidthRequest="12"
BorderColor="Black"
BackgroundColor="Black"
BorderWidth="1"
IsVisible="{Binding ShowHelpButton}">
<ImageButton.Source>
<FontImageSource FontFamily="FAFreeSolid"
Color="White"
Glyph="{x:Static fa:FontAwesomeIcons.Question}"/>
</ImageButton.Source>
</ImageButton>
</StackLayout>
<Label
Style="{StaticResource HelpStyle}"
Text="{Binding HelpTopic.Text}"
IsVisible="{Binding HelpTopic.IsVisible, Mode=TwoWay}">
</Label>
<StackLayout
RadioButtonGroup.GroupName="{Binding ChoiceList.Code}"
RadioButtonGroup.SelectedValue="{Binding Value}"
BindableLayout.ItemsSource="{Binding ChoiceList.Choices}"
BindableLayout.EmptyView="No choices available"
Orientation="Horizontal"
Margin="10,0,0,0">
<BindableLayout.ItemTemplate>
<DataTemplate>
<RadioButton Value="{Binding Value}"
Content="{Binding Label}"
IsChecked="{Binding IsSelected}"
CheckedChanged="OnRadioChanged"
FlowDirection="LeftToRight">
</RadioButton>
</DataTemplate>
</BindableLayout.ItemTemplate>
</StackLayout>
</StackLayout>
</DataTemplate>
It is called from a collection view on the content page:
<StackLayout>
<Frame BackgroundColor="#2196F3" Padding="24" CornerRadius="0">
<StackLayout>
<StackLayout Orientation="Horizontal">
<Label
Text="Work Order Request"
HorizontalTextAlignment="Start"
HorizontalOptions="StartAndExpand"
VerticalTextAlignment="Center"
TextColor="White"
FontSize="Large"/>
<Button Text="Back" Clicked="BackButton_Clicked" HorizontalOptions="End" />
</StackLayout>
<Label
Padding="0,2,0,0"
Text="Verify your data before submitting"
HorizontalTextAlignment="Start"
TextColor="White"
FontSize="Micro" />
</StackLayout>
</Frame>
<Label
Margin="10,0,0,0"
Grid.Column="0"
Text="SOME TEXT HERE"
HorizontalOptions="Start"
FontSize="Micro"/>
<CollectionView
ItemsSource="{Binding MainPageView.Fields}"
EmptyView="No fields for this screen."
ItemTemplate="{StaticResource templateSelector}"
SelectionChanged="CollectionView_SelectionChanged">
</CollectionView>
<StackLayout Margin="10,0,10,5" Orientation="Vertical">
<Button Command="{Binding MainPageView.SubmitCommand}" Text="Submit" />
<validator:ErrorSummaryView
IsVisible="{Binding MainPageView.ShowValidationSummary, Mode=OneWay}"
ErrorStateManager="{Binding MainPageView.ErrorStateManager, Mode=OneWay}"
Margin="0,0,0,5"/>
</StackLayout>
</StackLayout>
If I have the App.xaml.cs instantiate the view directly, it displays fine:
public App()
{
InitializeComponent();
MainPage = new MainPage(false);
}
However, if I change and add a landing page that has a button to redirect to that page:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="Test.Ui.Dashboard">
<ContentPage.Content>
<StackLayout>
<Frame BackgroundColor="#2196F3" Padding="24" CornerRadius="0">
<StackLayout>
<Label
Text="TEST DASHBOARD"
HorizontalTextAlignment="Start"
VerticalTextAlignment="Center"
TextColor="White"
FontSize="Large"/>
<Label
Padding="0,2,0,0"
Text="Sample UI/UX Pages"
HorizontalTextAlignment="Start"
TextColor="White"
FontSize="Micro" />
</StackLayout>
</Frame>
<StackLayout Orientation="Horizontal">
<Button Text="Work Order" Clicked="WorkOrder_Clicked" HorizontalOptions="FillAndExpand" BackgroundColor="#2196F3" TextColor="White" FontAttributes="Bold" FontSize="Large" CornerRadius="10"/>
<Button Text="Randomized Field Order" Clicked="Randomized_Clicked" HorizontalOptions="FillAndExpand" BackgroundColor="#2196F3" TextColor="White" FontAttributes="Bold" FontSize="Large" CornerRadius="10" />
</StackLayout>
</StackLayout>
</ContentPage.Content>
</ContentPage>
using System;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
namespace Test.Ui
{
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class Dashboard : ContentPage
{
public Dashboard()
{
InitializeComponent();
}
private void WorkOrder_Clicked(object sender, EventArgs e)
{
Navigation.PushAsync(new MainPage(false));
}
private void Randomized_Clicked(object sender, EventArgs e)
{
Navigation.PushAsync(new MainPage(true));
}
}
}
and change App.xaml.cs to
using Xamarin.Forms;
namespace Test.Ui
{
public partial class App : Application
{
public App()
{
InitializeComponent();
MainPage = new NavigationPage( new Dashboard());
}
protected override void OnStart()
{
// load up the style xaml files here
}
protected override void OnSleep()
{
}
protected override void OnResume()
{
}
}
}
Now, when I click the Work Order button, the radio options aren't displayed. If I change the stacklayout for the radio options to veritical orientation, they do. So the data is there but the view isn't able to render when I'm in a NavigationPage. Thoughts? I'd really like to have my radio buttons be horizontal when there aren't many choices.
Thanks

Answer 1

In my data template, I had to add an explicit WidthRequest = 150
<StackLayout
RadioButtonGroup.GroupName="{Binding ChoiceList.Code}"
RadioButtonGroup.SelectedValue="{Binding Value}"
BindableLayout.ItemsSource="{Binding ChoiceList.Choices}"
BindableLayout.EmptyView="No choices available"
Orientation="Horizontal"
Margin="10,0,0,0">
<BindableLayout.ItemTemplate>
<DataTemplate>
<RadioButton Value="{Binding Value}"
Content="{Binding Label}"
IsChecked="{Binding IsSelected}"
VerticalOptions="Center"
IsClippedToBounds="False"
HeightRequest="27"
WidthRequest="150"
CheckedChanged="OnRadioChanged">
</RadioButton>
</DataTemplate>
</BindableLayout.ItemTemplate>
</StackLayout>
I guess the StackLayout wasn't able to calculate how wide to make each one. Will see if I can figure out a different way to do it so it adjusts for the width of the content.