topic Re: Programmatically Change Magnify Glass Tiled Map Service in ArcGIS API for Silverlight Questions

Programmatically Change Magnify Glass Tiled Map Service

CameronIrvine — Wed, 23 Jun 2010 07:50:03 GMT

Can anyone tell me if its possible to change the Tiled Map Service for the Magnifying Glass at runtime? I have been trying to change the Tiled Map Service in code but it returns an error 'the value is out of range.'

I have found a work around by creating a separate magnifying glass per tiled map service and call it depending on the select tiled map service. It works but having one magnifying glass that can be changed would be more desirable.

Thanks,
Cameron

Re: Programmatically Change Magnify Glass Tiled Map Service

DominiqueBroux — Wed, 23 Jun 2010 11:10:34 GMT

It should work.

I didn't reproduce the issue.
I tested either by changing the Url of the magnifying glass layer or by changing the layer itself (by instantiating a new one). Both works.

How exactly ar you changing the Tiles Map Service? Which version are you using?

Re: Programmatically Change Magnify Glass Tiled Map Service

CameronIrvine — Thu, 24 Jun 2010 10:36:02 GMT

Hi Dominque,

I am using version 1.2.0.177

below is the xaml and code behind:

<esriToolkit:MagnifyingGlass x:Name="MyMagnifyingGlass" Visibility="Collapsed"
                                         HorizontalAlignment="Center" VerticalAlignment="Center"
                                         Map="{Binding ElementName=Map}" >
                    <esriToolkit:MagnifyingGlass.Layer>
                        <esri:ArcGISTiledMapServiceLayer ID="ColourMap" Url="http://esridev2ksrv/ArcGIS/rest/services/Maps/ColourMap/MapServer"/>
                    </esriToolkit:MagnifyingGlass.Layer>
                </esriToolkit:MagnifyingGlass>

We added the code in the code behind as:
MyMagnifyingGlass.Layer property was set as

ArcGISTiledMapServiceLayer arcgisLayer = Map.Layers["imagery"] as ArcGISTiledMapServiceLayer;
MyMagnifyingGlass.Layer = arcgisLayer;

This resulted in an application error with a message: "Value does not fall within the expected range."

I hope that is clear

Thanks!
Cameron

Re: Programmatically Change Magnify Glass Tiled Map Service

DominiqueBroux — Fri, 10 Dec 2021 21:17:44 GMT

The magnifying control can't reuse a layer coming from the map (a layer can only be displayed in ONE control).

Instead, create a new layer. Something like:

 
ArcGISTiledMapServiceLayer arcgisLayer = Map.Layers["imagery"] as ArcGISTiledMapServiceLayer;
ArcGISTiledMapServiceLayer arcgisMagnifyingLayer = new ArcGISTiledMapServiceLayer();
arcgisMagnifyingLayer.Url = arcgisLayer.Url;
MyMagnifyingGlass.Layer = arcgisMagnifyingLayer;

Or even simpler (depending on your need), you could just change the magnifying layer url:

MyMagnifyingGlass.Layer.Url = arcgisLayer.Url;

Re: Programmatically Change Magnify Glass Tiled Map Service

CameronIrvine — Wed, 30 Jun 2010 09:00:15 GMT

Hi Dominque,

For some reason I can't see the url property for layers (see attached image). I am using version 1.2.0.177.

Any ideas?

Thanks,
Cameron

Re: Programmatically Change Magnify Glass Tiled Map Service

DominiqueBroux — Fri, 10 Dec 2021 21:17:46 GMT

My bad. MagnifyingGlass Layer property is of type Layer and not TiledMapServiceLayer --> Need a cast:

 
((ArcGISTiledMapServiceLayer)MyMagnifyingGlass.Layer).Url = .....

Sorry about the mistake.

Re: Programmatically Change Magnify Glass Tiled Map Service

CameronIrvine — Thu, 01 Jul 2010 15:11:03 GMT

Thanks Dominique, managed to get it working with your help.