Latest Contributions by ReneRubalcava

I recently tried updating an app to allow adding selections to a FeatureLayer. This is using the 2.4 Flex API (want to avoid updating for the moment). I'm not doing any editing, I'm just loading the FeatureLayer with a service url like so http://internalserver/ArcGIS/rest/services/SewerFeatures/MapServer/4 I create my FeatureLayer like so fLayer.mode = FeatureLayer.MODE_SELECTION This thread suggests that I should use FeatureLayer.SELECTION_ADD when initializing, but when I did that, no selections worked. Anyway, I can do a selection using the default "new" fLayer.selectFeatures( query, FeatureLayer.SELECTION_NEW, new AsyncResponder( onSewerFeaturesSelected, onFault )); Then when I try to add to this selection at some point after the results are shown fLayer.selectFeatures( query, FeatureLayer.SELECTION_ADD, new AsyncResponder( onSewerFeaturesSelected, onFault )); It doesn't add new features to the selection, it just does a new selection and clears what was previously selected. These queries are being done via a geometry if that matters. Maybe I'm misunderstanding what FeatureLayer.SELECTION_ADD does when in FeatureLayer.MODE_SELECTION. I can probably work around it by saving my selected graphics and adding them back, but I would think the above method should work. ... View more

Please excuse my noobness when it comes to Silverlight, I'm still learning it. I am currently trying to select an item in my FeatureLayer based on a row click of a DataGrid. I found this thread, which I thought would get me on the right track, and I think I'm half way there. http://forums.arcgis.com/threads/19265-Selection-Based-on-Attributes?highlight=featurelayer+selection <esri:FeatureLayer ID="WorkOrders" x:Name="wo_FeatureLayer" Url="http://servername/ArcGIS/rest/services/WorkOrders/MapServer/0"                                    OutFields="*"> </esri:FeatureLayer> Then I have a DataGrid with some data where a single field matches an ID in my FeatureLayer. I use the DataGrids SelectionChanged event to start my query.         private void wo_DataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)         {             try             {                 WORK_ORDER wo = e.AddedItems[0] as WORK_ORDER;                 MessageBox.Show(wo.WorkOrderID.ToString());                                 // when I step through on a breakpoint here, it always tells me wo_FeatureLayer is null                 var graphic = wo_FeatureLayer.Where(g => g.Attributes["MXWONUM"].ToString() == wo.WorkOrderID.ToString()).First();                 graphic.Select();             }             catch(Exception err)             {                 MessageBox.Show("oops:" + err.Message);             }         } The resulting error is, "Value cannot be null. Parameter name:source" I know the FeatureLayer works, because I use it's MouseLeftDown event to populate another window without issue. I'm sure I must be missing something simple, but a nudge in the right direction would be helpful. Thanks. ... View more