Multiple Selection & MVVM

[Cristovao]

I'm trying to binde my ListPicker to an object that contains 2 collection , 1 for the values and one for the selected values

public ObservableCollection<CategoryFilterValue> SelectedValues
      {
          get { return _selectedValues; }
          set
          {
              if (value != _selectedValues)
              {
                  _selectedValues = value;
                  NotifyPropertyChanged("SelectedValues");
              }
          }
      }


 private ObservableCollection<CategoryFilterValue> _Values;
      public ObservableCollection<CategoryFilterValue> Values
      {
          get { return _Values; }
          set
          {
              if (value != _Values)
              {
                  _Values = value;
                  NotifyPropertyChanged("Values");
              }
          }
      }

And XAML

<telerikInput:RadListPicker
                                          Header="{Binding Text}"
                                          ItemsSource="{Binding Values}"
                                          Width="460" x:Name="radPicker"
                                          SelectionMode="Multiple"
                                          OkButtonIconUri="/Toolkit.Content/appbar.check.rest.png"
                                          CancelButtonIconUri="/Toolkit.Content/appbar.close.rest.png"
                                          SelectedItem="{Binding SelectedValues,ElementName=radPicker,Mode=TwoWay}"
                                          SelectionChanged="radListPicker_SelectionChanged" NoSelectionContent=" "
                                          >
                                          <telerikInput:RadListPicker.ItemTemplate>
                                              <DataTemplate>
                                                  <StackPanel>
                                                      <TextBlock Text="{Binding Text}" />
                                                  </StackPanel>
                                              </DataTemplate>
                                          </telerikInput:RadListPicker.ItemTemplate>

                                      </telerikInput:RadListPicker>

But this seams not to work as I do something like   SelectedValues.Clear(); 
but my listpicker still shows previous selections

Any thoughs?

[Deyan]

Hello Cristovao,

Thanks for writing.

You have to make sure that the items in both collections are the same. That means, the items contained in the SelectedValues collection should be the same objects that are provided to the ListPicker via the Values collection.

If this is the case and the issue persists, please let me know.

All the best,
Deyan
the Telerik team

[Cristovao]

I've opened a Ticket as Here I cannot post the example solution I've created 

[Deyan]

Hi Cristovao,

Your ticket has been handled.

Kind regards,
Deyan
the Telerik team