topic Re: Get layer names for ArcGIS.com webmap in ArcGIS API for Silverlight Questions

Get layer names for ArcGIS.com webmap

TerryGiles — Mon, 16 Jul 2012 20:53:27 GMT

I'm using code similar to the Load WebMap sample here and have a question. When I add the layers from the WebMap to my map, the Legend control associated with my map shows GUIDs for the various layer names. Is there some way to get the names as shown both in the description in ArcGIS.com and the ArcGIS.com map viewer?

I want the 'nice' names as shown in the map description -
[ATTACH=CONFIG]16139[/ATTACH]

Not the IDs that seem to come across from GetMapAsync
[ATTACH=CONFIG]16140[/ATTACH]

Thanks, Terry

Re: Get layer names for ArcGIS.com webmap

Anonymous User — Tue, 17 Jul 2012 06:21:38 GMT

Original User: dbroux

Which ArcGIS for SL version are you using?

In 3.0, a DisplayName property has been added on the Layer class.
The DisplayName is a friendly name for printing and legend control.

Re: Get layer names for ArcGIS.com webmap

TerryGiles — Sun, 12 Dec 2021 05:37:25 GMT

Thank you for the information Dominique. I'm still using 2.3 at this time - we're just starting to install & test 10.1 but may move the API to v3.0 to get this working. In the meantime, it looks like I can hit www.arcgis.com/sharing/content/items/<Item ID>/data?f=json to grab what I need and update the legend control.

Thanks again,

Terry

edit - here's the code to implement my idea above

                       webMap = new Document();
                        webMap.GetMapCompleted += (s, a) =>
                        {
                            if (a.Error == null)
                            {
                                MyMap.Extent = a.Map.Extent;


                                WebClient web = new WebClient();
                                web.OpenReadCompleted += (send, arg) => 
                                {
                                    JsonObject jsObj = (JsonObject)JsonObject.Load(arg.Result);
                                    if (jsObj.ContainsKey("error"))
                                    {
                                        return;
                                    }
                                    if (jsObj.ContainsKey("operationalLayers"))
                                    {
                                        JsonArray layers = (JsonArray)jsObj["operationalLayers"];
                                        foreach (JsonObject jOb in layers)
                                        {
                                            if (jOb.ContainsKey("itemId"))
                                            {
                                                try
                                                {
                                                    MyMap.Layers[jOb["itemId"]].ID = jOb["title"];
                                                }
                                                catch { }
                                            }
                                            else if (jOb.ContainsKey("id"))
                                            {
                                                try
                                                {
                                                    MyMap.Layers[jOb["id"]].ID = jOb["title"];
                                                }
                                                catch { }
                                            }
                                        }
                                    }
                                    if (jsObj.ContainsKey("baseMap"))  
                                    {
                                        JsonObject jOb = (JsonObject)jsObj["baseMap"]; 
                                        if (jOb.ContainsKey("baseMapLayers"))
                                        {                                            
                                            try
                                            {
                                                MyMap.Layers[jOb["baseMapLayers"][0]["id"]].ID = jOb["title"];
                                            }
                                            catch { }
                                        }
                                    }
                                };
                                web.OpenReadAsync(new Uri("http://www.arcgis.com/sharing/content/items/" + mapservice.MapServiceName + "/data?f=json"));
                                LayerCollection layerCollection = new LayerCollection();
                                foreach (Layer lyr in a.Map.Layers)
                                {
                                    layerCollection.Add(lyr);
                                    lyr.InitializationFailed += Layer_InitializationFailed;
                                }

                                a.Map.Layers.Clear();
                                MyMap.Layers = layerCollection;