topic Some Silverlight asynchronous processing issues in ArcGIS API for Silverlight Questions https://community.esri.com/t5/arcgis-api-for-silverlight-questions/some-silverlight-asynchronous-processing-issues/m-p/268514#M7005 <HTML><HEAD></HEAD><BODY><SPAN>Hello,</SPAN><BR /><BR /><SPAN>I'm having a little trouble getting the "sublayer list" functionality to work properly as it is presented under mapping in the Silverlight interactive sdk.</SPAN><BR /><BR /><SPAN>What is happening is that occasionally the GetDefaultVisibleLayers function will run before my dynamic services' layers collection is populated causing an error.&nbsp; This does not happen very often and I believe it's related to some asynchronous process running which does not allow me to guarantee that the layers collection is populated when the dynamic services' "initialized" event is fired off.&nbsp; The initialized event is where the GetDefaultVisibleLayers function is being called like in the SDK example.</SPAN><BR /><BR /><SPAN>Is there any workaround for this or some check that I can put into place to make sure that the layers collection is populated prior to calling GetDefaultVisibleLayers?</SPAN><BR /><BR /><SPAN>Another general question that I have is also related to asynchronous processing.&nbsp; We have a feature layer based on a SQL server query.&nbsp; What I want to do is establish a where clause for the service based on some default selections in other silverlight controls that are databound using RIA services.&nbsp; I need to make sure that these controls are populated with data prior to building my feature layer where clause.&nbsp; Are there any tried and true methods to setting up some kind of process order whereby I can wait on building the where clause until I know the other controls are populated?</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><BR /><SPAN>Phil</SPAN></BODY></HTML> Tue, 22 Feb 2011 12:11:29 GMT PhilDegler 2011-02-22T12:11:29Z Some Silverlight asynchronous processing issues https://community.esri.com/t5/arcgis-api-for-silverlight-questions/some-silverlight-asynchronous-processing-issues/m-p/268514#M7005 <HTML><HEAD></HEAD><BODY><SPAN>Hello,</SPAN><BR /><BR /><SPAN>I'm having a little trouble getting the "sublayer list" functionality to work properly as it is presented under mapping in the Silverlight interactive sdk.</SPAN><BR /><BR /><SPAN>What is happening is that occasionally the GetDefaultVisibleLayers function will run before my dynamic services' layers collection is populated causing an error.&nbsp; This does not happen very often and I believe it's related to some asynchronous process running which does not allow me to guarantee that the layers collection is populated when the dynamic services' "initialized" event is fired off.&nbsp; The initialized event is where the GetDefaultVisibleLayers function is being called like in the SDK example.</SPAN><BR /><BR /><SPAN>Is there any workaround for this or some check that I can put into place to make sure that the layers collection is populated prior to calling GetDefaultVisibleLayers?</SPAN><BR /><BR /><SPAN>Another general question that I have is also related to asynchronous processing.&nbsp; We have a feature layer based on a SQL server query.&nbsp; What I want to do is establish a where clause for the service based on some default selections in other silverlight controls that are databound using RIA services.&nbsp; I need to make sure that these controls are populated with data prior to building my feature layer where clause.&nbsp; Are there any tried and true methods to setting up some kind of process order whereby I can wait on building the where clause until I know the other controls are populated?</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><BR /><SPAN>Phil</SPAN></BODY></HTML> Tue, 22 Feb 2011 12:11:29 GMT https://community.esri.com/t5/arcgis-api-for-silverlight-questions/some-silverlight-asynchronous-processing-issues/m-p/268514#M7005 PhilDegler 2011-02-22T12:11:29Z Re: Some Silverlight asynchronous processing issues https://community.esri.com/t5/arcgis-api-for-silverlight-questions/some-silverlight-asynchronous-processing-issues/m-p/268515#M7006 <HTML><HEAD></HEAD><BODY><SPAN>You can check for IsInitialized property, this should have already been set to true or false when Initialized event fires.</SPAN><BR /><BR /><SPAN>As for your other question, I'm not sure if Loaded or LayoutUpdated are the events you need to know whether all controls drawn. If I understood your question right, it's a Silverlight question? Maybe you can also post at their forum.</SPAN></BODY></HTML> Tue, 22 Feb 2011 23:14:44 GMT https://community.esri.com/t5/arcgis-api-for-silverlight-questions/some-silverlight-asynchronous-processing-issues/m-p/268515#M7006 JenniferNery 2011-02-22T23:14:44Z