topic Re: Add to feature layer in ArcGIS API for Silverlight Questions

Add to feature layer

RyanDanford — Wed, 03 Aug 2011 17:24:13 GMT

How can I add a graphic to a feature layer without using the editor?

The new graphic will consist of geometry from a union thus the add command of the "Editor" is of no use.

Re: Add to feature layer

ChristopherHill — Wed, 03 Aug 2011 17:52:56 GMT

Hello,

If you are trying to add graphics in the code behind:

myFeatureLayer.Graphics.Add(myGraphic);

Re: Add to feature layer

RyanDanford — Sun, 12 Dec 2021 01:01:24 GMT

I suppose that I should have been more clear in what I am trying to do.

private void HyperlinkButton_Click_1(object sender, RoutedEventArgs e)
        {
            Draw draw = new Draw(map)
            {
                DrawMode = DrawMode.Rectangle,
                FillSymbol = new ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol() { BorderThickness = 2, BorderBrush = new SolidColorBrush(Colors.Red) },
                IsEnabled = true
            };
            draw.DrawComplete += (s, args) =>
                {
                    GeometryService reproj = new GeometryService(URL);
                    reproj.ProjectCompleted += (rep, done) =>
                    {
                        QueryTask qt = new QueryTask(URL);
                        qt.ExecuteCompleted += (task, res) =>
                            {
                                GeometryService geos = new GeometryService(URL);
                                geos.UnionCompleted += (geo, un) =>
                                    {
                                        FeatureLayer fl = (FeatureLayer)map.Layers["Layer"];
                                        Graphic g = new Graphic()
                                        {
                                            Geometry = un.Result,
                                            Symbol = ((SimpleRenderer)fl.Renderer).Symbol
                                        };
                                        fl.Graphics.Add(g);
                                        // Save back to SDE?
                                    };
                                if (res.FeatureSet.Count() > 0)
                                {
                                    geos.UnionAsync(res.FeatureSet.ToList<Graphic>());
                                }
                                draw.IsEnabled = false;
                            };
                        Query query = new Query();
                        query.OutFields.Add("*");
                        query.ReturnGeometry = true;
                        query.OutSpatialReference = map.SpatialReference;
                        query.Geometry = done.Results[0].Geometry;
                        qt.ExecuteAsync(query);
                    };
                    reproj.ProjectAsync(new List<Graphic>() { new Graphic() { Geometry = args.Geometry } }, new SpatialReference(3424));
                };
        }

The code above will add the graphic to the layer correctly, but I need to dump this new graphic back into the SDE.

Re: Add to feature layer

ChristopherHill — Sun, 12 Dec 2021 01:01:27 GMT

If you have your feature layer set to AutoSave=true then you are done. if it is AutoSave=false then
fl.SaveEdits() would be your last call.

private void HyperlinkButton_Click_1(object sender, RoutedEventArgs e)
        {
            Draw draw = new Draw(map)
            {
                DrawMode = DrawMode.Rectangle,
                FillSymbol = new ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol() { BorderThickness = 2, BorderBrush = new SolidColorBrush(Colors.Red) },
                IsEnabled = true
            };
            draw.DrawComplete += (s, args) =>
                {
                    GeometryService reproj = new GeometryService(URL);
                    reproj.ProjectCompleted += (rep, done) =>
                    {
                        QueryTask qt = new QueryTask(URL);
                        qt.ExecuteCompleted += (task, res) =>
                            {
                                GeometryService geos = new GeometryService(URL);
                                geos.UnionCompleted += (geo, un) =>
                                    {
                                        FeatureLayer fl = (FeatureLayer)map.Layers["Layer"];
                                        Graphic g = new Graphic()
                                        {
                                            Geometry = un.Result,
                                            Symbol = ((SimpleRenderer)fl.Renderer).Symbol
                                        };
                                        fl.Graphics.Add(g); // if AutoSave = true then it saves on add
                                        fl.SaveEdits(); // explicit save to the server when AutoSave = false
                                    };
                                if (res.FeatureSet.Count() > 0)
                                {
                                    geos.UnionAsync(res.FeatureSet.ToList<Graphic>());
                                }
                                draw.IsEnabled = false;
                            };
                        Query query = new Query();
                        query.OutFields.Add("*");
                        query.ReturnGeometry = true;
                        query.OutSpatialReference = map.SpatialReference;
                        query.Geometry = done.Results[0].Geometry;
                        qt.ExecuteAsync(query);
                    };
                    reproj.ProjectAsync(new List<Graphic>() { new Graphic() { Geometry = args.Geometry } }, new SpatialReference(3424));
                };
        }

Re: Add to feature layer

RyanDanford — Thu, 04 Aug 2011 11:46:11 GMT

Greetings...

I've tried using the SaveUpdates method, but nothing seems to happen. I don't get any errors, but the data isn't saved either. Is there something else that I need to do? Is the graphic object missing some basic piece of required data?

Re: Add to feature layer

ChristopherHill — Thu, 04 Aug 2011 22:09:53 GMT

It appears that the code is correct.

Make sure you are using the feature server url endpoint i.e. (FeatureLayer.Url = "http://.../FeatureServer/{LayerID}") the MapServer/{LayerID} end point is not for editing.

You can add event handler to the following FeatureLayer events.
FeatureLayer.BeginSaveEdits
FeatureLayer.EndSaveEdits
FeatureLayer.SaveEditsFailed

Re: Add to feature layer

RyanDanford — Fri, 05 Aug 2011 13:38:10 GMT

Make sure you are using the feature server url endpoint i.e. (FeatureLayer.Url = "http://.../FeatureServer/{LayerID}") the MapServer/{LayerID} end point is not for editing.

Ugh... That was part of the problem.

I have another issue cropping up now when the graphic is added to the layer:

Type must be Int16.

   at ESRI.ArcGIS.Client.FeatureLayer.graphicAdded(Graphic g)
   at ESRI.ArcGIS.Client.FeatureLayer.Graphics_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
   at ESRI.ArcGIS.Client.GraphicCollection.InsertItem(Int32 index, Graphic item)
   at System.Collections.ObjectModel.Collection`1.Add(T item)
   at SJG.HMMFIELDBOOK.MainPage.<>c__DisplayClass1c.<HyperlinkButton_Click_1>b__19(Object geo, GeometryEventArgs un)
   at ESRI.ArcGIS.Client.Tasks.GeometryService.OnUnionCompleted(GeometryEventArgs args)
   at ESRI.ArcGIS.Client.Tasks.GeometryService.union_Completed(Object sender, RequestEventArgs e)
   at ESRI.ArcGIS.Client.Tasks.TaskBase.request_Completed(Object sender, RequestEventArgs e)
   at ESRI.ArcGIS.Client.WebRequest.OnComplete(RequestEventArgs args)
   at ESRI.ArcGIS.Client.WebRequest.downloadStringCompleted(Object sender, DownloadStringCompletedEventArgs e)
   at System.Net.WebClient.OnDownloadStringCompleted(DownloadStringCompletedEventArgs e)
   at System.Net.WebClient.DownloadStringOperationCompleted(Object arg)

Re: Add to feature layer

deleted-user-hb3f0SCDAPf8 — Wed, 13 Aug 2014 15:39:08 GMT

Was the "Type must be Int16" resolved for you? How?

Thanks!

Re: Add to feature layer

ReneeCammarere — Fri, 31 Oct 2014 19:16:28 GMT

I've run into this same problem, and would be curious to know how you resolved it as well.

Re: Add to feature layer

JenniferNery — Mon, 03 Nov 2014 18:47:46 GMT

You can use service metadata to get the correct datatype for each attribute. FeatureLayer.LayerInfo.Fields should have that information for you.

ArcGIS API for Silverlight API Reference| ArcGIS for Developers

var graphic = new Graphic() { Geometry = someValidGeometry };

foreach(var f in layer.LayerInfo.Fields)

if((f.OutFields.Contains("*") || f.OutFields.Contains(f.Name)) && f.Editable)

f.Attributes[f.Name]= someValidValue; // check f.Type, f.Nullable, f.Length

But if you want to suppress validation, you can set FeatureLayer.ValidateEdits=false.

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Re: Add to feature layer

ReneeCammarere — Mon, 03 Nov 2014 18:58:19 GMT

Thanks for your explanation.