DataGrid: how to bind a button

[Pierre-Christophe Dus]

Hello,

I use the DataGrid with some DataGridTextColumns and a DataGridTemplatedColumn that must contain a button allowing to navigate to another page.

In code-behind, there is no problem.
But when I try to use a ViewModel implementation with a Command, it doesn't work!

The code looks like this:

<controls:DataGrid x:Name="DataGrid" Grid.Row="1"
                    ItemsSource="{Binding MyForms}"
                    SelectionMode="Single"
                    SelectedItem="{Binding SelectedForm, Mode=TwoWay}"
                    DefaultOrderIndex="1">
    <controls:DataGrid.Columns>
        <controls:DataGridTextColumn Width="0.7*" Header="Form Nr" Binding="{Binding form_id}" />
        <controls:DataGridTextColumn Width="*" Header="Submitter" Binding="{Binding submitter}" />
        ...
        <controls:DataGridTemplatedColumn Width="*" Header="Action">
            <controls:DataGridTemplatedColumn.CellTemplate>
                <DataTemplate>
                    <Button Content="Open">
                        <i:Interaction.Behaviors>
                            <core:EventTriggerBehavior EventName="Tapped">
                                <core:InvokeCommandAction Command="{Binding OpenFormCommand}" />
                            </core:EventTriggerBehavior>
                        </i:Interaction.Behaviors>
                    </Button>
                </DataTemplate>
            </controls:DataGridTemplatedColumn.CellTemplate>
        </controls:DataGridTemplatedColumn>
    </controls:DataGrid.Columns>
    ...
</controls:DataGrid>

Would you have an idea?

[Rico Suter]

Do you have binging errors in your output? The context inside a column is the item not the root view model... You could bind to the parent view model via a static resource, see https://blog.rsuter.com/recommendations-best-practices-implementing-mvvm-xaml-net-applications/