InformationLayer Not Clearing

[Sean]

I have an InformationLayer that contains points through a LocationCollection property in a view model. When I call the Clear() method on the LocationCollection, the lines on the map don't go away (even if I zoom in or out). My InformationLayer XAML looks like the following. As mentioned, MyPolyline is a LocationCollection:

<telerik:InformationLayer>
    <telerik:MapPolyline Points="{Binding MyPolyline}" Fill="Transparent" Stroke="Teal" StrokeThickness="1" />
</telerik:InformationLayer>

It appears I'm running version 2011.2.920.40. I have confirmed the MyPolyline.Count property is 0 after calling the Clear() method, but as mentioned, the lines on the map don't go away.

[Andrey]

Hello Sean,

This is known issue with ObservableCollection in WPF. The Clear method don't raise "collection changed" event. Please, use our extension method RemoveAll instead. For example:

this.model.Polyline.RemoveAll();

Kind regards,

Andrey Murzov

the Telerik team