WPF CheckBox Command inside a Listview DataTemplate

Question

My CheckBox Command does not work. I want to pass the SelectedItem of the ListView to the Command when the SelectedItem is checked or unchecked, but the Command does not execute at all. I also suspect my CommandParameter is not configured correctly?

I am pretty sure the problem is because the CheckBox is within a ListView DataTemplate.

Can someone show me how to set this up? I tried to follow examples I found, but nothing seems to work. thanks.

XAML

<ListView x:Name="lvReferralSource" ItemsSource="{Binding ReferralSourceTypeObsCollection}" Style="{StaticResource TypeListViewStyle}">
  <ListView.ItemTemplate>
    <DataTemplate>
      <StackPanel Orientation="Vertical">
      <CheckBox x:Name="ckbReferralIsChecked" Content="{Binding Value}" IsChecked="{Binding Active}" Style="{StaticResource CheckBoxStyleBase2}"
       Command="{Binding CheckBoxIsChecked}" CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListView}}, Path=SelectedItem}">
      </CheckBox>
      </StackPanel>
    </DataTemplate>
  </ListView.ItemTemplate>
</ListView>

CODE

private ICommand _CheckBoxIsChecked;
public ICommand CheckBoxIsChecked
{
    get
    {
        if (_CheckBoxIsChecked == null)
        {
            _CheckBoxIsChecked = new RelayCommand<object>(ExecuteCheckBoxIsChecked, CanExecuteCheckBoxIsChecked);
        }

        return _CheckBoxIsChecked;
    }
}
public bool CanExecuteCheckBoxIsChecked(object parameter)
{
    return true;
}
public void ExecuteCheckBoxIsChecked(object parameter)
{
    Mouse.OverrideCursor = Cursors.Wait;

    if (parameter != null)
    {
        //Do Stuff...
    }

    Mouse.OverrideCursor = Cursors.Hand;
}

Can you share the `TypeListViewStyle` and `CheckBoxStyleBase2` code — RandomCoder, Jun 03 '19 at 08:21
Please also check output console for binding related error information. — Anant Dabhi, Jun 03 '19 at 09:54

score 1 · Accepted Answer · answered Jun 03 '19 at 09:50

1

Your command should get executed provided that the CheckBoxIsChecked property belongs to the data object where the Value and Active properties are defined.

If it belongs to the view model, you could bind to it using a RelativeSource:

<CheckBox x:Name="ckbReferralIsChecked" Content="{Binding Value}" IsChecked="{Binding Active}"
            Style="{StaticResource CheckBoxStyleBase2}"
            Command="{Binding DataContext.CheckBoxIsChecked, RelativeSource={RelativeSource AncestorType=ListView}}" 
            CommandParameter="{Binding}">

answered Jun 03 '19 at 09:50

mm8

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Awesome. Thanks. CheckBoxIsChecked is in the view model whereas Value and Active were in the model. – mjordan Jun 03 '19 at 22:02
I posted a follow up question about the correct way to add the CommandParameter. I took a guess, but it's not quite right... https://stackoverflow.com/questions/56435313/wpf-commandparameter-relativesource-binding – mjordan Jun 03 '19 at 22:35

WPF CheckBox Command inside a Listview DataTemplate

1 Answers1