AdaptativeGrid x:Bind to a method in the ItemTemplate fails.

[mcNets]

I created a new user control with 2 DP , let say Maximum and Minimum and one method SubtractionString() which returns the difference between maximum and minimum as a formatted as string.

public sealed partial class MyControl : UserControl
{
    public MyControl()
    {
        this.InitializeComponent();
    }

    public double Minimum
    {
        get { return (double)GetValue(MinimumProperty); }
        set { SetValue(MinimumProperty, value); }
    }

    public static readonly DependencyProperty MinimumProperty =
        DependencyProperty.Register("Minimum", typeof(double), typeof(MyControl), new PropertyMetadata(0.0));

    public double Maximum
    {
        get { return (double)GetValue(MaximumProperty); }
        set { SetValue(MaximumProperty, value); }
    }

    public static readonly DependencyProperty MaximumProperty =
        DependencyProperty.Register("Maximum", typeof(double), typeof(MyControl), new PropertyMetadata(0.0));

    public string SubtractionString() => $"{Maximum - Minimum}";
}

If I use this control as a DataTemplate of one ItemsRepeater control, is shows the value of SubtractionString, but if I use the same DataTemplate in a AdaptativeGrid, this values is always 0.

<toolkit:AdaptiveGridView Grid.Row="3"
                            ItemsSource="{x:Bind ViewModel.MyData, Mode=OneWay}"
                            OneRowModeEnabled="True"
                            ItemHeight="100"
                            SelectionMode="Single"
                            IsItemClickEnabled="True">

    <toolkit:AdaptiveGridView.ItemTemplate>

        <DataTemplate x:DataType="local:DataModel">

            <local:MyControl Minimum="{x:Bind Minimium, Mode=OneWay}"
                                Maximum="{x:Bind Maximum, Mode=OneWay}"
                                Height="100" />

        </DataTemplate>

    </toolkit:AdaptiveGridView.ItemTemplate>

</toolkit:AdaptiveGridView>

I've added a minimum reproducible example.

TestAdaptativeGrid.zip

[technelak]

Hey mcNets,

I don't have a direct answer for why this works in a Items Repeater vs the AdaptiveGridView. I'm guessing that it's a difference in binding at compile time between the two controls. I don't know if it's best practice to have a method in the user control to generate a value based on the 2 dps. I would create a calculated property in your DataModel and bind to that. Sorry if this doesn't help you!