topic FeatureLayer - getting just the newly added features? in ArcGIS API for Silverlight Questions https://community.esri.com/t5/arcgis-api-for-silverlight-questions/featurelayer-getting-just-the-newly-added-features/m-p/429670#M11086 <HTML><HEAD></HEAD><BODY><SPAN>Hi, </SPAN><BR /><BR /><SPAN>I have an OnDemand FeatureLayer. And I need to do something with each Graphic that is added (eg. setting the ZIndex). Is there a way to get the collection of the added graphics in each Update? Looping through all the graphics in the layer in the UpdateCompleted, seems a bit overkill.</SPAN><BR /><BR /><SPAN>One more question <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span> When I set the FeatureLayer to invisible, why is it making an initial request fetching a lot of features anyway?</SPAN></BODY></HTML> Sat, 03 Jul 2010 19:46:34 GMT Joachim_EckboJuell 2010-07-03T19:46:34Z FeatureLayer - getting just the newly added features? https://community.esri.com/t5/arcgis-api-for-silverlight-questions/featurelayer-getting-just-the-newly-added-features/m-p/429670#M11086 <HTML><HEAD></HEAD><BODY><SPAN>Hi, </SPAN><BR /><BR /><SPAN>I have an OnDemand FeatureLayer. And I need to do something with each Graphic that is added (eg. setting the ZIndex). Is there a way to get the collection of the added graphics in each Update? Looping through all the graphics in the layer in the UpdateCompleted, seems a bit overkill.</SPAN><BR /><BR /><SPAN>One more question <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span> When I set the FeatureLayer to invisible, why is it making an initial request fetching a lot of features anyway?</SPAN></BODY></HTML> Sat, 03 Jul 2010 19:46:34 GMT https://community.esri.com/t5/arcgis-api-for-silverlight-questions/featurelayer-getting-just-the-newly-added-features/m-p/429670#M11086 Joachim_EckboJuell 2010-07-03T19:46:34Z Re: FeatureLayer - getting just the newly added features? https://community.esri.com/t5/arcgis-api-for-silverlight-questions/featurelayer-getting-just-the-newly-added-features/m-p/429671#M11087 <HTML><HEAD></HEAD><BODY><SPAN>An "Update" re-executes the query for the layer and replaces exisiting features with new, so there is not a list of "just changed and/or added features". Therefore your only option is to iterate on all the features. However I doubt that should really be of much concern. Iterating 1000s of features can be done in a split second. I'm often doing complex LINQ joins and queries on large amounts of the data, and haven't seen any major performance hit (drawing a vast amount of features seems to be the bottleneck long before any other operation).</SPAN></BODY></HTML> Mon, 05 Jul 2010 14:53:53 GMT https://community.esri.com/t5/arcgis-api-for-silverlight-questions/featurelayer-getting-just-the-newly-added-features/m-p/429671#M11087 dotMorten_esri 2010-07-05T14:53:53Z