topic Unable to save edits to graphics on GraphicsLayer using Editor control in ArcGIS API for Silverlight Questions

Unable to save edits to graphics on GraphicsLayer using Editor control

AndyWright — Sun, 12 Dec 2021 03:18:23 GMT

I took the sample from here ...

http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#EditToolsAutoSave

... and modified it to use a GraphicsLayer instead of a FeatureLayer. I added buttons to enable the addition of points, lines, and polygons using a Draw object. I am able to add them, edit their vertices, and move them around no problem. But the only changes that persist are the ones to the points. Every time I move or edit the vertices of a line or polygon and then click the New Selection button the graphic reverts back to its original state prior to making edits.

I noticed with the FeatureLayer there is an explicit Update method that can be called, but I don't see anything similar with a GraphicsLayer. How can I explicitly save edits to graphics on a graphics layer so they will persist across a given edit session?

Here's my XAML ...


<UserControl x:Class="ESRIEditingTest.MainPage"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 xmlns:esri="http://schemas.esri.com/arcgis/client/2009" 
 xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"
 xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows" 
 xmlns:ed="http://schemas.microsoft.com/expression/2010/drawing" 
 xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit"
 xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity">
    
    <Grid x:Name="LayoutRoot">
        <Grid.Resources>
            <esri:Editor x:Key="MyEditor" EditCompleted="Editor_EditCompleted"
                         Map="{Binding ElementName=MyMap}" 
                         LayerIDs="ThreatAreas"
                         GeometryServiceUrl="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer" />
        </Grid.Resources>

        <esri:Map x:Name="MyMap" Extent="-13054165,3850112,-13027133,3863559" esri:Editor.SnapDistance="20" esri:Editor.SnapKey="S">
            <esri:ArcGISTiledMapServiceLayer ID="BaseLayer" Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer" />
            <esri:GraphicsLayer ID="ThreatAreas" />
           <!--<esri:FeatureLayer ID="ThreatAreas"  
                               Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/HomelandSecurity/operations/FeatureServer/2"                  
                               AutoSave="True" 
                               Mode="OnDemand" 
                               ValidateEdits="True" 
                               DisableClientCaching="True" />-->
        </esri:Map>

        <Border Background="#FF919191" BorderThickness="1" CornerRadius="5"
             HorizontalAlignment="Right"  VerticalAlignment="Top"
             Padding="5" BorderBrush="Black" Margin="0,5,5,0"
                DataContext="{StaticResource MyEditor}">

            <StackPanel x:Name="EditorTools" 
                        Orientation="Vertical">
                <StackPanel Orientation="Horizontal">
                    <Button x:Name="AddButton" Margin="2"
                         ToolTipService.ToolTip="Civil Disturbance"
                         Content="Add Polygon" 
                         Command="{Binding Add}">
                        <Button.CommandParameter>
                            <sys:Int32>10101</sys:Int32>
                        </Button.CommandParameter>
                    </Button>
                    <Button x:Name="SelectButton" Margin="2"                            
                            Command="{Binding Select}" 
                            CommandParameter="New" >
                        <TextBlock>New<LineBreak/>Selection</TextBlock>
                    </Button>
                    <Button x:Name="AddSelectButton" Margin="2"                            
                            Command="{Binding Select}" 
                            CommandParameter="Add">
                        <TextBlock>Add to<LineBreak/>Selection</TextBlock>
                    </Button>
                    <Button x:Name="RemoveSelectButton" Margin="2"                             
                            Command="{Binding Select}"
                            CommandParameter="Remove" >
                        <TextBlock>Remove from<LineBreak/>Selection</TextBlock>
                    </Button>
                    <Button x:Name="ClearSelectionButton" Margin="2"                            
                            Command="{Binding ClearSelection}">
                        <TextBlock>Clear<LineBreak/>Selection</TextBlock>
                    </Button>
                    <Button x:Name="DeleteButton" Margin="2"                           
                            Command="{Binding DeleteSelected}">
                        <TextBlock>Delete<LineBreak/>Selected</TextBlock>
                    </Button>
                    <Button x:Name="CancelButton" Margin="2"                           
                            Command="{Binding CancelActive}">
                        <TextBlock>Cancel<LineBreak/>Action</TextBlock>
                    </Button>
                    <Button x:Name="AddPolyButton" Margin="2" Click="AddPolyButton_Click">
                        <TextBlock>Add<LineBreak/>Poly</TextBlock>
                    </Button>
                    <Button x:Name="AddPointButton" Margin="2" Click="AddPointButton_Click">
                        <TextBlock>Add<LineBreak/>Point</TextBlock>
                    </Button>
                    <Button x:Name="AddLineButton" Margin="2" Click="AddLineButton_Click">
                        <TextBlock>Add<LineBreak/>Line</TextBlock>
                    </Button>
                </StackPanel>
                <StackPanel Orientation="Horizontal">
                    <Button x:Name="EditVerticesButton" Margin="2"                        
                         Command="{Binding EditVertices}">
                        <TextBlock>Edit Vertices<LineBreak/>/Move Selected</TextBlock>
                    </Button>
                    <Button x:Name="CutButton" Margin="2"                            
                            Command="{Binding Cut}">
                        <TextBlock>Cut<LineBreak/>Selected</TextBlock>
                    </Button>
                    <Button x:Name="ReshapeButton" Margin="2"                           
                            Command="{Binding Reshape}">
                        <TextBlock>Reshape<LineBreak/>Selected</TextBlock>
                    </Button>
                    <Button x:Name="UnionButton" Margin="2"                           
                            Command="{Binding Union}">
                        <TextBlock>Union<LineBreak/>Selected</TextBlock>
                    </Button>
                    <Button x:Name="SaveButton" Margin="2"                           
                            Command="{Binding Save}">
                        <TextBlock>Save</TextBlock>
                    </Button>
                </StackPanel>
                <StackPanel Orientation="Horizontal">
                    <CheckBox x:Name="FreehandCheckBox" VerticalAlignment="Center" Margin="2"
                          IsChecked="{Binding Path=Freehand, Mode=TwoWay}" 
                          Content="Freehand Draw" />
                    <CheckBox x:Name="AutoCompleteCheckBox" VerticalAlignment="Center" Margin="2"
                          IsChecked="{Binding Path=AutoComplete, Mode=TwoWay}" 
                          Content="Auto Complete" />
                    <CheckBox x:Name="AutoSelectCheckBox" VerticalAlignment="Center" Margin="2"
                          IsChecked="{Binding Path=AutoSelect, Mode=TwoWay}" 
                          Content="Auto Select" />
                    <CheckBox x:Name="ContinuousCheckBox" VerticalAlignment="Center" Margin="2"
                          IsChecked="{Binding Path=ContinuousMode, Mode=TwoWay}" 
                          Content="Continuous Action" />
                </StackPanel>
            </StackPanel>
        </Border>
    </Grid>
</UserControl>

Re: Unable to save edits to graphics on GraphicsLayer using Editor control

AndyWright — Sun, 12 Dec 2021 03:18:26 GMT

And here's my code behind ...


using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Geometry;
using ESRI.ArcGIS.Client.Symbols;

namespace ESRIEditingTest
{
    public partial class MainPage : UserControl
    {
        private Draw _drawObject = new Draw();

        public MainPage()
        {
            InitializeComponent();

            Loaded += new RoutedEventHandler(MainPage_Loaded);
        }

        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            _drawObject.Map = MyMap;
            _drawObject.DrawComplete += new EventHandler<DrawEventArgs>(_drawObject_DrawComplete);
        }

        void _drawObject_DrawComplete(object sender, DrawEventArgs e)
        {
            GraphicsLayer gl = MyMap.Layers["ThreatAreas"] as GraphicsLayer;
            Graphic gr = new Graphic();

            if (e.Geometry is MapPoint)
            {
                SimpleMarkerSymbol sms = new SimpleMarkerSymbol();
                sms.Size = 10;
                sms.Color = new SolidColorBrush(Colors.Red);
                sms.Style = SimpleMarkerSymbol.SimpleMarkerStyle.Circle;

                MapPoint p = e.Geometry as MapPoint;
                gr = new Graphic
                {
                    Geometry = p,
                    Symbol = sms
                };
            }
            else if (e.Geometry is Polyline)
            {
                SimpleLineSymbol sls = new SimpleLineSymbol();
                sls.Color = new SolidColorBrush(Colors.Red);
                sls.Style = SimpleLineSymbol.LineStyle.Solid;
                sls.Width = 2;

                Polyline p = e.Geometry as Polyline;
                gr = new Graphic
                {
                    Geometry = p,
                    Symbol = sls
                };
            }
            else if (e.Geometry is Polygon)
            {
                SimpleFillSymbol sfs = new SimpleFillSymbol();
                sfs.BorderBrush = new SolidColorBrush(Colors.Cyan);
                sfs.BorderThickness = 2;
                sfs.Fill = new SolidColorBrush(Colors.Red);
                sfs.Fill.Opacity = 0.7;

                Polygon p = e.Geometry as Polygon;
                gr = new Graphic
                {
                    Geometry = p,
                    Symbol = sfs
                };
            }

            gl.Graphics.Add(gr);

            _drawObject.IsEnabled = false;
        }

        private void AddPolyButton_Click(object sender, RoutedEventArgs e)
        {
            _drawObject.IsEnabled = true;
            _drawObject.DrawMode = DrawMode.Polygon;
        }

        private void AddPointButton_Click(object sender, RoutedEventArgs e)
        {
            _drawObject.IsEnabled = true;
            _drawObject.DrawMode = DrawMode.Point;
        }

        private void AddLineButton_Click(object sender, RoutedEventArgs e)
        {
            _drawObject.IsEnabled = true;
            _drawObject.DrawMode = DrawMode.Polyline;
        }

        private void Editor_EditCompleted(object sender, Editor.EditEventArgs e)
        {

        }
    }
}

Re: Unable to save edits to graphics on GraphicsLayer using Editor control

JenniferNery — Thu, 17 Mar 2011 13:54:54 GMT

This is the intended behavior. When you activate another command before completing the edit, the uncommitted geometry change will be lost. To complete the edit, you click on the geometry being edited or click on another feature.

Note also that moving a point, unlike moving/editing polyline/polygon/envelope geometries is committed as soon as the geometry is moved.

Re: Unable to save edits to graphics on GraphicsLayer using Editor control

AndyWright — Thu, 17 Mar 2011 14:01:39 GMT

Ahhh! I didn't notice that yesterday. Thanks.

Is there any way to explicitly save the edit like when the EditComplete event fires or something or do they only get saved the two ways you explained?

Re: Unable to save edits to graphics on GraphicsLayer using Editor control

JenniferNery — Thu, 17 Mar 2011 15:33:05 GMT

These are the only two ways to commit the edit on the geometry.

Re: Unable to save edits to graphics on GraphicsLayer using Editor control

AndyWright — Thu, 17 Mar 2011 16:29:25 GMT

Ok, thanks Jennifer ...

Re: Unable to save edits to graphics on GraphicsLayer using Editor control

GéraldReusser — Tue, 12 Jul 2011 11:52:23 GMT

This is the intended behavior. When you activate another command before completing the edit, the uncommitted geometry change will be lost. To complete the edit, you click on the geometry being edited or click on another feature.

Note also that moving a point, unlike moving/editing polyline/polygon/envelope geometries is committed as soon as the geometry is moved.

Hello. I don't unterstand the second way. I've tryed to click on another graphic of the same featurelayer, but it doesn't work (the modified graphic comes back to original form). What do you mean with this alternative ?

thanks.