GeoRssLayer Update

Question

I'v have an active GeoRss Layer on my map and it loads fine. I added a button to force a refresh to get the latest feeds.

When I try to update the GeoRssLayer the graphics are removed, the layer is still visible and the Layer.Graphics.count is never changed.

What an I missing?

Private Sub NewButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
        Dim Layer As GeoRssLayer = TryCast(MyMap.Layers("MyGeoRssLayer"), GeoRssLayer)
        Layer.Update()

End Sub

Current code is a slightly modified version of this example: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#GeoRssSimple

Thanks

DarellStoick · Answer

ok, I understand. I have the sample workin now. Thanks

DominiqueBroux · Answer

If you need the projection provided in the sample, take care that this projection is only done the first time.
To keep the projection active when the graphics are updated, change the code to:
      void _geoRssLayer_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if (e.PropertyName == "Graphics")
            {
               // Comment or remove this line  _geoRssLayer.PropertyChanged -= _geoRssLayer_PropertyChanged;
                updateGeoRssGraphics();
            }
        }