topic Re: Adding an element to the feature layer programmatically in ArcGIS API for Silverlight Questions

Adding an element to the feature layer programmatically

MarvinOconitrillo — Tue, 03 Jan 2012 14:49:52 GMT

Hi, I was trying to add a new element into my featurelayer service programmatically, but when I save the editions, it seems that doesn't work because I can't see changes on the map neither the data.
I was trying to use on my code behind an editor declared on the xaml, getting an instance of the feature layer from there, and then adding my new element with an Graphic instance that I create before, so, I use the add method of the feature layer and after that the saveEdit method, and finally the refresh methos to refresh my map.
Can anybody help me, I would like to know what I'm doing wrong about that, I'm posting fragments of my code to show what I explained before.
Thanks.

*Fragment of the xaml declaring the editor

<Grid.Resources>
            <esri:Editor x:Key="Editor" 
                         Map="{Binding ElementName=Map}" 
                         LayerIDs="Poligonos"                          GeometryServiceUrl="http://crbd02/ArcGIS/rest/services/Geometry/GeometryServer"
                             />
</Grid.Resources>

*Fragment of the code declaring the Map and the feature layer

<!-- Map Control -->
        <esri:Map x:Name="Map" Background="White" WrapAround="true" IsLogoVisible="False" Extent="-1442632.89843668,-274130.672780001,8713596.00123668,5756744.12838">
            <i:Interaction.Triggers>
                <i:EventTrigger EventName="MouseEnter">
                    <ei:ChangePropertyAction TargetName="myMenuItems" PropertyName="Visibility">
                        <ei:ChangePropertyAction.Value>
                            <Visibility>Collapsed</Visibility>
                        </ei:ChangePropertyAction.Value>
                    </ei:ChangePropertyAction>
                </i:EventTrigger>
            </i:Interaction.Triggers>
            <esri:FeatureLayer ID="Poligonos" Url="http://crbd02/ArcGIS/rest/services/DemosAPIs/Edicion_APIS/FeatureServer/0" AutoSave="False" x:Name="Poligonos"
                                Mode="OnDemand" ValidateEdits="True" DisableClientCaching="True"/>
        
</esri:Map>

*Fragment of the code adding the new element into the feature layer, the object gra have the graphic that I draw before and I want to add to the feature layer.

Graphic gra = null;

                gra = VentanaDerroteroEnPanel.FinalizarDibujo();
                PanelVentanaDerrotero.Visibility = System.Windows.Visibility.Collapsed;

                Editor editor = LayoutRoot.Resources["Editor"] as Editor;
                foreach (GraphicsLayer graphicsLayer in editor.GraphicsLayers)
                {
                    if (graphicsLayer is FeatureLayer)
                    {
                        FeatureLayer featureLayer = graphicsLayer as FeatureLayer;
                        if (featureLayer.ID == "Poligonos")
                        {
                            featureLayer.Graphics.Add(gra);
                            featureLayer.SaveEdits();
                            featureLayer.Refresh();
                        }
                    }
                }

Re: Adding an element to the feature layer programmatically

JenniferNery — Tue, 03 Jan 2012 17:30:25 GMT

Have you looked at this SDK sample? http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#EditToolsExplicitSave

Editor is interactive. The Add command allows you to draw the geometry and give it default prototype attributes. Your code-snippet indicate that you are not using Editor.Add at all. I'm also not sure if FeatureLayer has already been initialized and updated before you add your graphic. Are you setting both geometry and attributes? You can subscribe to FeatureLayer.EndSaveEdits and SaveEditsFailed events to see error messages if any. You can run Fiddler to see what edit is being committed when you call SaveEdits().

Re: Adding an element to the feature layer programmatically

MarvinOconitrillo — Tue, 03 Jan 2012 18:56:40 GMT

I subscribed the SaveEditsFailed and It's giving me an error "Unable to complete operation". I saw the example you send me, but there are some things that I don't understand, for example, the save edits button is just binding with the function of the editor, is there some way that I can emulate that function programmatically? and if there is, would you give me an example?

I guess I'm not setting the geometry and the attributes, could you bring me an example of that?

Re: Adding an element to the feature layer programmatically

JenniferNery — Sat, 11 Dec 2021 18:11:00 GMT

If you are not using Editor. You can add graphic and save edits using the following code. Note that FeatureLayer l is already Initialized and UpdateCompleted. If FeatureLayer.AutoSave=False (True by default), you need to call SaveEdits() to commit the edits.

   Graphic g = new Graphic()
   {
    Geometry = new MapPoint(x, y, MyMap.SpatialReference), 
    Symbol = LayoutRoot.Resources["MySymbol"] as Symbol
   };
   foreach(var f in l.LayerInfo.Fields)
   {
    if (f.Editable)
     g.Attributes[f.Name] = f.Nullable ? null : somedefaultvalue;
   }
   l.Graphics.Add(g);
   l.SaveEdits();

Re: Adding an element to the feature layer programmatically

MarvinOconitrillo — Sat, 11 Dec 2021 18:11:02 GMT

Hi, I used the code you give me, but I'm still getting an error when I'm saving the edition, I don't know if there are another thing I should consider when I'm saving my edits, for example something like permissions, etc.

Following I show you how I used the code:

Here I get the feature layer after it is initialized and updated

private void Poligonos_UpdateCompleted(object sender, EventArgs e)
{
    layerPoligonos = (FeatureLayer)sender;
}

After that I try to insert the new graphic and the attributes; I also checked the graphic had a correct geometry and symbol when I'm trying to insert into the feature layer

Graphic gra = null;

gra = VentanaDerroteroEnPanel.FinalizarDibujo();

foreach (var f in layerPoligonos.LayerInfo.Fields)
{
  f (f.Editable)
  {
     switch(f.Name)
     {
        case "ID":
        gra.Attributes[f.Name] = 205;
        break;
        case "Descripcion":
        gra.Attributes[f.Name] = "prueba";
        break;
     }//fin switch
   }
}
layerPoligonos.Graphics.Add(gra);
layerPoligonos.SaveEdits();

The error said "Unable to complete the operation", and have the code 400.

Do you have any idea what could be the problem with the code?

Thanks.

Re: Adding an element to the feature layer programmatically

JenniferNery — Wed, 04 Jan 2012 23:26:42 GMT

Can you run fiddler with your sample app? The service error could mean a number of things. It's possible that the geometry is not topologically correct or there were some missing attributes that need to be set. But first can you see if you are able to add feature and save edits using Editor (interactively)? If yes, you can try to see if you need to simpilify the geometry before saving: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#Simplify

Re: Adding an element to the feature layer programmatically

MarvinOconitrillo — Thu, 05 Jan 2012 20:53:09 GMT

Hi, I tested adding a feature using the editor (interactively) and worked correctly, so I discard the layer like the problem in my insertion, but while I was working with the editor I saw that the add button have a parameter, that let me especify the kind of feature I'm going to insert, and I would like to know if at the code that you gave me, I should specify in the same way the kind of feature that I'm going to insert before I use the add method.

Thanks.

Re: Adding an element to the feature layer programmatically

JenniferNery — Fri, 06 Jan 2012 02:30:35 GMT

Kindly look at post#10 http://forums.arcgis.com/threads/19100-Silverlight-samples-from-ESRI

Re: Adding an element to the feature layer programmatically

MarvinOconitrillo — Mon, 09 Jan 2012 18:23:18 GMT

Hi Jennifer,

My code is working right now, the problem was the way I built the Graphic I was trying to insert.

Thanks a lot

Re: Adding an element to the feature layer programmatically

sameerpuppal — Thu, 26 Apr 2012 11:57:01 GMT

Hi,

I am facing exactly the same issue with the same error. can you share the way you built the graphics which worked ?

Regards,
Sameer puppal

Re: Adding an element to the feature layer programmatically

michaelrosen — Sat, 11 Dec 2021 18:11:05 GMT

I also am facing this issue. I've got a map that has an editable featurelayer. I can programmatically -- without using the Editor -- add a Graphic to the layer and it renders properly. However, the subsequent "Save" fails with the error message "Unable to complete operation."

I'll greatly appreciate some help here.

Here's what I'm doing:

      private void ImportCollection(String name, MapPoint LL, MapPoint UR, SpatialReference srs)
      {
          ArcGISLocalFeatureLayer featureLayer = mapControl.Layers["theArcGISLocalFeatureLayer"] as ArcGISLocalFeatureLayer;


          //// Hook up some diagnostic event handler so we can see what is going wrong.
          featureLayer.BeginSaveEdits += (s1, beginEditEventArgs) =>
          {   /// this part is fine.   Adds.Count shows 1.
              System.Diagnostics.Trace.WriteLine(String.Format("s1: {0}, number of Adds: {1}", s1, beginEditEventArgs.Adds.Count));
          };

          featureLayer.EndSaveEdits += (s2, endEditEventArgs) =>
          {    /// No joy here.  We fail instead.
              System.Diagnostics.Trace.WriteLine(String.Format("featureLayer.Graphics.Count: {0}", featureLayer.Graphics.Count));
          };

          featureLayer.SaveEditsFailed += (s3, taskFailedEventArgs) =>
          {    //// We can tell the Save failed here ... "Unable to complete operation." ... But why?
              System.Diagnostics.Trace.WriteLine(String.Format("taskFailedEventArgs.Error.Message: {0}", taskFailedEventArgs.Error.Message));
          };          
          
          
          List<Graphic> listPnt = _geometryTask.Project(new List<Graphic>() { new Graphic() { Geometry = LL } }, mapControl.SpatialReference) as List<Graphic>;
          listPnt = _geometryTask.Project(new List<Graphic>() { new Graphic() { Geometry = LL } }, mapControl.SpatialReference) as List<Graphic>;
          MapPoint wgs84Pnt = listPnt[0].Geometry as MapPoint;
          LL.X = wgs84Pnt.X;
          LL.Y = wgs84Pnt.Y;

          listPnt = _geometryTask.Project(new List<Graphic>() { new Graphic() { Geometry = UR } }, mapControl.SpatialReference) as List<Graphic>;
          wgs84Pnt = listPnt[0].Geometry as MapPoint;
          UR.X = wgs84Pnt.X;
          UR.Y = wgs84Pnt.Y;

          Graphic gra = new Graphic(); ////           Create a new Graphic and add it to the layer ... this works to the extent that it renders properly on the map!
          gra.Geometry = new Envelope(LL, UR);
          gra.Geometry = new Envelope(LL, UR);
          gra.Symbol = featureLayer.Renderer.GetSymbol(gra);
          featureLayer.Graphics.Add(gra);
      }

Re: Adding an element to the feature layer programmatically

PreetiMaske — Sat, 11 Dec 2021 18:11:07 GMT

Actually the problem is that you are trying to add a graphic with envelope as geometry when layer expects geometry of type polygon. In your sample code if you change the code as follows, the graphic will be saved correctly.

ESRI.ArcGIS.Client.Geometry.Polygon poly = new ESRI.ArcGIS.Client.Geometry.Polygon();
      ESRI.ArcGIS.Client.Geometry.PointCollection pts = new ESRI.ArcGIS.Client.Geometry.PointCollection();
      Graphic gra = new Graphic(); 
      //gra.Geometry = new Envelope(LL, UR);      
      pts.Add(LL);
      pts.Add(new MapPoint(UR.X, LL.Y));
      pts.Add(UR);
      pts.Add(new MapPoint(LL.X, UR.Y));
      poly.SpatialReference = MyMap.SpatialReference;
      poly.Rings.Add(pts);
      gra.Geometry = poly;

      gra.Symbol = featureLayer.Renderer.GetSymbol(gra);
      featureLayer.Graphics.Add(gra);

Re: Adding an element to the feature layer programmatically

michaelrosen — Tue, 14 May 2013 17:54:23 GMT

Right you are Preeti. Thanks so much for this!

msr

please help :)

ahmedelashry — Sat, 11 Dec 2021 18:11:10 GMT

am having a bad time in adding graphic point to feature layer using another graphic point from another feature

there is no exceptions or errors , and am sure of every single line , and debugging gets into the if condition with has edits , and it saves

no reflection in the database, i wish to know why

the code is implemented in the FeatureLayer_MouseLeftButtonUp e

   private void FeatureLayer_MouseLeftButtonUp(object sender, GraphicMouseButtonEventArgs e)
        {
            FeatureLayer featureLayer = sender as FeatureLayer;
            
            foreach (Graphic g in featureLayer.Graphics)
                if (g.Selected)
                {
                    g.UnSelect();
                }

            e.Graphic.Select();
      
            MyFeatureDataForm.FeatureLayer = featureLayer;
            MyFeatureDataForm.GraphicSource = e.Graphic;
            FeatureDataFormBorder.Visibility = Visibility.Visible;

            Graphic newg = new Graphic();
            newg.Geometry = e.Graphic.Geometry;
            newg.Symbol = LayoutRoot.Resources["RedMarkerSymbol"] as MarkerSymbol;

            FeatureLayer ft = MyMap.Layers["events"] as FeatureLayer;
            ft.Graphics.Add(newg);

            if (ft.HasEdits)
            {
                ft.SaveEdits();
            }
            else
            {
                MessageBox.Show("no Edits");
            }
            //Editor edit = LayoutRoot.Resources["MyEditor"] as Editor;
            //foreach (GraphicsLayer graphicsLayer in edit.GraphicsLayers)
            //{
            //    if (graphicsLayer is FeatureLayer)
            //    {
                    
            //        ft = graphicsLayer as FeatureLayer;
            //        ft.Graphics.Add(newg);
                    
                    
                   
            //    }
            //}
        }

my project dead line is tomorrow ps: