How do I bind ListItem to CommandParameter

Question

I have a ListBox :

<ListBox Margin="10" Padding="10" ItemsSource="{Binding Items}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <!-- Data template -->
            <Grid>
                <Grid.ColumnDefinitions>
                    <!--Image-->
                    <ColumnDefinition Width="auto" />
                    <!--Info-->
                    <ColumnDefinition Width="500" />
                    <!--Options-->
                    <ColumnDefinition Width="*" /
                </Grid.ColumnDefinitions>
                <Image Height="50" Width="50" />
                <StackPanel Grid.Column="1" HorizontalAlignment="Left">
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="Name: " />
                        <TextBlock Text="{Binding Name}" />
                    </StackPanel>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="ID: " />
                        <TextBlock Text="{Binding ID}" />
                    </StackPanel>
                </StackPanel>
                <Button Grid.Column="2" Content="{Binding Status}" Command="{Binding CompleteCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:MainPageViewModel}}}" CommandParameter="{Binding}" HorizontalAlignment="Right" />
            </Grid>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

I need my CommandParameter be the ListItem of this ListBox.

ListItem? Do you mean the item with the ID and Status properties? — mm8
– mm8, Commented Nov 8, 2017 at 12:59

mm8 · Accepted Answer · 2017-11-08 13:01:43Z

2

Set the AncestorType to ListBox and include DataContext in the path:

<Button ... Command="{Binding DataContext.CompleteCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListBox}}}" CommandParameter="{Binding}" HorizontalAlignment="Right"></Button>

Then the Command binding should work provided that the CompleteCommand property belongs to the same class as the Items property

answered Nov 8, 2017 at 13:01

mm8

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5 Comments

mm8 Over a year ago

Yes, I guess this is the class where the Items property is defined? It might be an idea to post the definition of the MainPageViewModel class.

user8664286 Over a year ago

You mean DataContext is the one which is used to Bind Items ?

mm8 Over a year ago

DataContext returns the DataContext of the ListBox, which is the view model.

user8664286 Over a year ago

Thanks bro I got you.

user8664286 Over a year ago

No need. I made stupidly stupid mistake there. I have forgotten to put public to my CompleteCommand :(!!!

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