topic Re: Dynamic Service Layer Loaded? in ArcGIS API for Silverlight Questions

Dynamic Service Layer Loaded?

MatthewPilgrim — Wed, 17 Nov 2010 14:32:06 GMT

Hi,
How do I tell when a ArcGISDynamicMapServiceLayer has loaded all the Layers in the LayerInfo Array?

I am trying to set the VisibleLayers property but this doesn't seem to work by the time the Layer.Initialized event fires. If I wait a while and the run the same code (presumably after the layers are fully loaded) then it works.

Any advice?

Thanks in advance, Matt

Re: Dynamic Service Layer Loaded?

DominiqueBroux — Sun, 12 Dec 2021 04:30:36 GMT

When all layers of a map are initialized, the event 'LayersInitialized' fires on LayerCollection object.

So you can hook up with a code like :

 
myMap.Layers.LayersInitialized += ....

That being said it's strange that your code is not working by the time the Layer.Initialized event fires. In my opinion, it should work. What is doing your code exactly?

Re: Dynamic Service Layer Loaded?

MatthewPilgrim — Sun, 12 Dec 2021 04:30:39 GMT

Hi,

I am trying to set the VisibleLayers property in MapPrinter.InitializePrintMap (in your Print example).

if (toLayer != null)
    {
     toLayer.InitializationFailed += (s, e) => { }; // to avoid crash if bad layer
                    toLayer.Initialized += (s, e) => {

                                  CopyLayerVisibility((Layer)s, toLayer);

                    };

     printMap.Layers.Add(toLayer);
    }

This loops though the feature layers in the main maps dynamic layer building an list of visible ones and then sets them on the print maps dynamic layer [ToLayer]. i.e.

ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer printdynamicService = (ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)ToLayer;
                    printdynamicService.VisibleLayers = visibleLayerList.ToArray();

This doesn't work when the printmap is first initialized. If I call the same code sometime later from PreparePages (called by clicking the scale fixed checkbox) then it works.

Matt