Latest Contributions by JoeHershman

I still waiting for your help, if you want!!!! I am not sure I am clear on the issue.  Calling a task you are giving it the Url of a service.  This is done in C# code, you will always call the task from code.  There is no reason that the service (url) that you call in code has to be defined in the map Xaml.  In the sample applications you get a location based on a mouse click, once you have the MapPoint there is no longer anything that has to do with the map.  If you remove the h ttp://romulus/ArcGIS/rest/.../Continents/MapServer service layer from the map you can still use that Url in your identify task. If you build a super service that has all you layers, when you create your identify task it is:     IdentifyTask task = new IdentifyTask("http://romulus/arcgis/rest/AllLayerService/MapServer");     //Your parameters define the sub layers used     task.ExecuteAsync(parameters); It does not matter if http://romulus/arcgis/rest/AllLayerService/MapServer is in the map or not. Hope that helps, -Joe (and please feel free to give any posts you find helpful points by clicking the Up arrow) ... View more

Ok, are the spatial references different, that I gave above? or same? [PHP]1. Arcgis 9.3.1 Spatial Reference: PROJCS["Transverse Mercator",GEOGCS["GCS_D_ITRF_1996",DATUM[ 2. Arcgis 10 Spatial Reference: PROJCS["WGS_1984_UTM_Zone_35N",GEOGCS["GCS_WGS_1984",DATUM[ these looks like same. The names are different, therefore, they are different.  Even though the other parameters may be the same -Joe ... View more

If you have that error, you can place your Cursor over the class name that is in red that throws the error.  Edit > Intellisense > Resolve and it will show you what using statement is missing and add it for you. ... View more

Meanwhile the resource center for ArcGIS 10.1 has replaced the previous one : http://resources.arcgis.com/en/home/ The silverlight samples are here : http://resources.arcgis.com/en/help/silverlight-api/samples/start.htm If it moved off the beta url to the main Url does that mean it is released? 😉 ... View more

I will try to create a service that does not appear on my application, but only to operate the Identify tool and I will get back to you to inform you of the results. Thank you very much for your cooperation I made an error before, there is no reason why that service would need to be in your map and not visible.  The service simply needs to exist on the server Good luck -Joe ... View more

Then,I must declare all my services separatly in C #: C # code: IdentifyTask identifyTask IdentifyTask = new ("http://romulus/ArcGIS/rest/.../Continents/MapServer"' IdentifyTask identifyTask IdentifyTask = new ("http://romulus/ArcGIS/rest/.../Pays/MapServer"); IdentifyTask identifyTask IdentifyTask = new ("http://romulus/ArcGIS/rest/.../Communes/MapServer"); .... You are not declaring your services separately, your services are your services.  An IdentifyTask (as does any rest call) has a single rest endpoint.  If you want to make calls into different services than you are making method calls on multiple rest endpoints.  This is not something in the ESRI API causing a problem, this is how rest works.  Tasks are simply convenient easy to use wrappers for rest method calls, An option if you only want one IdentifyTask call would be to create a 'super' service that is not visible in the map.  The IdentifyTask could be run against this service instead of needing to run against multiple services. Hope that helps -Joe ... View more

I do not believe the Identify task works with FeatureLayers, Identify operation is supported only with MapServices.  If you enter the Url you are using into a browser and go to the bottom of the page you will see operations that are supported by that Rest service Url. The general thinking behind the Identify task is to do a quick spatial search for features in multiple layers based on a location.  It is along the lines of the Identify tool in ArcMap. If you have numerous FeatureLayers you could run an Identify on every service that the FeatureLayers are part of passing in the LayerIds of the Layers you use in that Service.  You would not need to do an Identify for every FeatureLayer, but you would have to do one for each of the services that contain your FeatureLayers (e.g. one for each of these...)      http://romulus/ArcGIS/rest/services/Axeroute_Luxembourg/MapServer      http://romulus/ArcGIS/rest/services/CENTRALITE_Administration_Etat/MapServer Passing in the appropriate LayerIds as in my earlier post. If your goal is to simplify the code in your Silverlight application you might want to look into creating a SOE or Geoprocessing task that does the work on the server with one call from your client. ... View more

What is _map.MapLayerService and where does this enter into things?  Seems you could just change the VisibleLayers array on that and it would achieve you goal. Hard to say without knowing more.  Are there more details about the error being received? -Joe btw:  PRISM has a Microsoft.Practices.Prism.ViewModel.NotificationObject which implements INotifyPropertyChanged and exposes a RaisePropertyChanged so you can inherit from that object instead of having to implement INotifyPropertyChanged in every ViewModel ... View more

In your code you setup your IdentifyParameters as such:         private void QueryPoint_MouseClick(object sender, ESRI.ArcGIS.Client.Map.MouseEventArgs e)         {             MapPoint clickPoint = e.MapPoint;             IdentifyParameters identifyParams = new IdentifyParameters()                                                     {                                                         Geometry = clickPoint,                                                         MapExtent = MyMap.Extent,                                                         Width = (int) MyMap.ActualWidth,                                                         Height = (int) MyMap.ActualHeight,                                                         LayerOption = LayerOption.visible,                                                         SpatialReference = MyMap.SpatialReference,                                                     };             IdentifyTask identifyTask = new IdentifyTask("http://romulus/ArcGIS/rest/services/...../Monde/MapServer")             identifyTask.ExecuteCompleted += IdentifyTask_ExecuteCompleted;             identifyTask.Failed += IdentifyTask_Failed;             identifyTask.ExecuteAsync(identifyParams);         } In this code you set the Identify task to return values for all visible layers because LayerOption = LayerOption.visible. If instead you setup the parameters like this         private void QueryPoint_MouseClick(object sender, ESRI.ArcGIS.Client.Map.MouseEventArgs e)         {             MapPoint clickPoint = e.MapPoint;             IdentifyParameters identifyParams = new IdentifyParameters()                                                     {                                                         Geometry = clickPoint,                                                         MapExtent = MyMap.Extent,                                                         Width = (int) MyMap.ActualWidth,                                                         Height = (int) MyMap.ActualHeight,                                                         SpatialReference = MyMap.SpatialReference,                                                     };             identifyParams.LayerIds.Add(2);             IdentifyTask identifyTask = new IdentifyTask("http://romulus/ArcGIS/rest/services/...../Monde/MapServer")             identifyTask.ExecuteCompleted += IdentifyTask_ExecuteCompleted;             identifyTask.Failed += IdentifyTask_Failed;             identifyTask.ExecuteAsync(identifyParams);         } Where instead of setting a value for LayerOptions like in the first example you add Ids to the LayerIds collection          identifyParams.LayerIds.Add(2); Now when the Identify task runs it will only search fro result from LayerId = 2.  This way you can use a service with many layers but only return identify results from one (or any subset), which seems to be what you want to do Hope that helps -Joe ... View more

Hello, I managed to make the sample "Identify" from API Silverlight  in my application with a service that contains several layers: Code: IdentifyTask identifyTask = new IdentifyTask("http://romulus/ArcGIS/rest...../Monde/MapServer") But in my application, I would be obliged to work with multiple services and each service contains a single layer, for example, to display their attribute table, then when I wanted to test the tools with a service that contains a single layer, it does not work: Example of Feature Layer: Code: IdentifyTask identifyTask = new IdentifyTask("http://romulus/ArcGIS/rest/services/CENTRALITE_Administration_Etat/MapServer/2") So what to do in case I want the Identify fonction on all services that I declared in my Group Layer? Please help me if you have ideas. The IdentifyParameters object that you use with the IdentifyTask::ExecuteAsynch methods has a LayerIds property which is a List<int> and this defines which layers to use in the Identify task     parameters.LayerIds.Add(2);     identifyTask.ExecuteAsynch(parameters) Would return only features from the layer with LayerId=2. Hope that helps, -Joe ... View more

Interesting post, thanks. In the mapUrl returned the maptype is defined                 mapURL = string.Format                   ("http://maps.google.com/maps/api/staticmap?center={0},{1}&zoom={2}&size={3}x{4}&maptype=roadmap&sensor=false",                    geogCenterPoint.Y, geogCenterPoint.X, currentLodIndex, requestWidth, requestHeight); Seems you could make two other Google layer classes nearly identical to the one Rex provides but one would have maptype=satellite and one maptype=hybrid (https://developers.google.com/maps/documentation/staticmaps/#MapTypes). When the user clicks the button either add/remove layers or set the Visible property accordingly.  I would test, but the environment I work in does not allow outside access from our development machines Good luck -Joe ... View more

Jennifer and Joe, Thanks. Both worked. Your welcome if you could mark as answered that would be great. Not sure how far along you are with developing in PRISM.  What I have found is that a reference to the Map object itself within ViewModels is really necessary because there are a lot of properties and methods that the Map exposes that are pretty important throughout the application.  I have my MainPage implement an Interface which exposes the Map and use Dependency Injection to pass that Interface object instance to ViewModels across an application The manipulation of the Layers would be pretty much the same as how you are doing it except it is with the Map::Layers collection not a LayerCollection object. Good luck, -Joe ... View more