New Post: CheckBoxComboBox - Problem with displaying Checks

Hi,

Make sure that the selected item in the "SelectedCenters" is an item from the ItemsSource "CostCenterFilter", not a new instance.
Here's my code-behind to work width your xaml :

 public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();

      this.DataContext = this;
      this.CostCenterFilter = new ObservableCollection<MyData>()
      {
        new MyData() { LoadingCenterCode = 1 },
        new MyData() { LoadingCenterCode = 2 },
        new MyData() { LoadingCenterCode = 3 },
        new MyData() { LoadingCenterCode = 4 },
        new MyData() { LoadingCenterCode = 5 },
        new MyData() { LoadingCenterCode = 6 },
        new MyData() { LoadingCenterCode = 7 },
        new MyData() { LoadingCenterCode = 8 },
        new MyData() { LoadingCenterCode = 9 },
        new MyData() { LoadingCenterCode = 10 },
      };
      this.SelectedCenters = new ObservableCollection<MyData>()
      {
        this.CostCenterFilter[3]
        //new MyData() { LoadingCenterCode = 3 }   //This doesn't work !
      };
    }

    public ObservableCollection<MyData> CostCenterFilter
    {
      get;
      set;
    }

    public ObservableCollection<MyData> SelectedCenters
    {
      get;
      set;
    }
  }

  public class MyData
  {
    public int LoadingCenterCode
    {
      get;
      set;
    }
  }

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