Build a CheckListBox

Question

Hello,

 

I've tried to build a usercontrol CheckListBox similar to

https://www.codeproject.com/Tips/1210187/%2FTips%2F1210187%2FA-WPF-CheckBox-ListBox

But this example doesn't show how to bind IsChecked or IsSelected to Viewmodels data.

In the xaml is the line IsChecked="{TemplateBinding IsSelected}" 

I've build an observable list based on simple class "Satz" with IsChecked-property.

The app works, but my IsChecked-property Is'nt used, because I don't know how to connect it to "TemplateBinding IsSelected"

 

 

This is the esentiell Part of the xaml:

 

<ListBox Margin="15"
           VerticalAlignment="Stretch"
           ItemsSource="{Binding Items}"
           SelectionMode="Multiple">
      <ListBox.Resources>
          <Style TargetType="ListBoxItem">
              <Setter Property="OverridesDefaultStyle" Value="true" />
              <Setter Property="SnapsToDevicePixels" Value="true" />
              <Setter Property="Template">
                  <Setter.Value>
                      <ControlTemplate TargetType="ListBoxItem">
                          <CheckBox Margin="5,2"
                                    IsChecked="{TemplateBinding IsSelected}">
                              <ContentPresenter />
                          </CheckBox>
                      </ControlTemplate>
                  </Setter.Value>
              </Setter>
          </Style>
      </ListBox.Resources>
  </ListBox>

and this the part of ViewModel.cs

 

public enum EnumCheckListBox
{
    hare, hedgehog, deer, frog, fox, wolf, wild_boar
}
public class Satz
{
    public EnumCheckListBox What { get; set; }
    public override string ToString()
    {
        return What.ToString();
    }
    public bool IsChecked { get; set; }
}
public class ViewModel
{
    public ObservableCollection<Satz> Items { get; } = new ObservableCollection<Satz>();
    public ViewModel()
    {
        foreach (EnumCheckListBox enm in Enum.GetValues(typeof(EnumCheckListBox)))
        {
            Items.Add(new Satz {
                What = enm,
                IsChecked = enm == EnumCheckListBox.deer
            });
        }
    }
}

 

 

 

 

best regards Dietmar