I'm using the new Windows Phone 8 LongListSelector
control, which has its ItemsControl
assigned to a List<Group<object>>
as so:
List<Group<PlacePoint>> searchResults;
async void doSearch()
{
this.searchResults = await SearchHelper.Instance.getSearchResults(txtSearchTerm.Text);
longList.ItemsSource = this.searchResults;
}
Unfortunately, the second time that I search, re-setting the .ItemsSource property has no effect and the control simply displays the old List.
How can I change the binding?
It would seem that re-assigning longList.ItemsSource does not have any effect, whether this is a bug or by design I can't say.
However, an easy workaround is simply to use an ObservableCollection> instead and then work with this collection rather than re-assigning the ItemsSource.
Sample code:
ObservableCollection<Group<PlacePoint>> searchResults = new ObservableCollection<Group<PlacePoint>>();
public SearchPage()
{
InitializeComponent();
longList.ItemsSource = this.searchResults;
}
async void doSearch()
{
List<Group<PlacePoint>> tempResults = await SearchHelper.Instance.getSearchResults(txtSearchTerm.Text);
// Clear existing collection and re-add new results
this.searchResults.Clear();
foreach (Group<PlacePoint> grp in tempResults )
{
this.searchResults.Add(grp);
}
}
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