problems with x:Bind Mode=OneWay

Question

I'm using x:Bind with mode=OneWay.

<CommandBar
    DefaultLabelPosition="Bottom"
    RelativePanel.RightOf="AutoSuggestBoxSearchItem">
    <AppBarButton
        x:Name="DetailsButton"
        Icon="Contact"
        Label="View details"
        IsEnabled="{x:Bind converters:Converters.IsNotNull(ViewModel.SelectedItem), Mode=OneWay}"/>
    <AppBarButton
        x:Name="DeleteButton"
        Icon="Delete"
        Label="Delete"
        IsEnabled="{x:Bind converters:Converters.IsNotNull(ViewModel.SelectedItem), Mode=OneWay}"/>
    <AppBarSeparator/>
    <AppBarButton
        x:Name="AddButton"
        Icon="Add"
        Label="Add"/>

IsNotNull check's if object is not null.

public class Converters
{
    public static bool  IsNotNull(object value) => value != null;
}

ViewModel.SectedItem show's selected item in datagrid. So when i select item in DataGrid, app bar buttons must set property isEnabled to true.

But: 2 first button on the top must be available, but thay aren't

Answer 1

Create a property and bind it to IsEnabled as shown below IsEnabled="{x:Bind propertyName)

On the property setter use OnPropertyChanged("propertyName")