Possibly related to the fact you are using a property on a class that's referenced as a StaticResource? My understanding of StaticResource is that once it's created then it's immutable. That might not limit properties of said instance tho, so am just guessing. It might work fine if you were using a viewmodel and binding to the properties on that directly, rather than to a resource.
maybe not much help... :( On Thu, Mar 4, 2010 at 1:50 PM, <[email protected]> wrote: > Hi all, > > I have a strange situation where the ItemsSource property on a combo box > won't OneWay bind to > the data source. That is, after the initial bind to the ItemsSource bound > property, I change the > contents of that bound collection, call the PropertyChanged event for that > property, but it doesn't > update the combo box list. > > Here's the resource: > > <navigation:Page.Resources> > <lst:ListProvider x:Key="ListProvider" d:IsDataSource="True" /> > </navigation:Page.Resources> > > Here's the Combo Box declaration: > <ComboBox Grid.Row="0" Grid.Column="1" > x:Name="cmbTermCategory" > ItemsSource="{Binding Path=TermCategoryList, Mode=OneWay, > Source={StaticResource > ListProvider}}" > Style="{StaticResource ComboBoxStyle}" Height="24" > DisplayMemberPath="Description" > /> > > Here's the ListProvider class: (hopefully only irrelevant code removed) > public sealed class ListProvider : INotifyPropertyChanged > { > private ObservableCollection<ListValue> moTermCategoryList > = new ObservableCollection<ListValue>(); > public ObservableCollection<ListValue> TermCategoryList > { > get > { > return moTermCategoryList; > } > set > { > moTermCategoryList = value; > OnPropertyChanged("TermCategoryList"); > } > } > > #region INotifyPropertyChanged Members > > public event PropertyChangedEventHandler PropertyChanged; > > private void OnPropertyChanged(string propertyName) > { > if (PropertyChanged != null) > PropertyChanged(this, new > PropertyChangedEventArgs(propertyName)); > } > > #endregion // INotifyPropertyChanged Members > > } > > > When the screen loads, it initially calls the bind to the TermCategoryList > property. At that time the > list is empty. I make a database call to populate the list and when it is > finished, I call > OnPropertyChanged("TermCategoryList"). I would have thought that this would > cause the bind to > be refired and the get should re-execute, but it doesn't. > > In fact, the PropertyChanged event is not even set - it's null. > > ...snip from within my OnLoadCompleted async callback method: > > moTermCategoryList.Clear(); > foreach (ListValue item in poLoadOperation.Entities) > { > moTermCategoryList.Add(item); > } > OnPropertyChanged("TermCategoryList"); > > Any idea what I might be missing? > > Regards, > Tony > > _______________________________________________ > ozsilverlight mailing list > [email protected] > http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight >
_______________________________________________ ozsilverlight mailing list [email protected] http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight
