topic Re: Identify Problem in ArcGIS API for Silverlight Questions

Identify Problem

TolgaBakirman — Thu, 14 Mar 2013 11:19:23 GMT

Hello,
I'm really new to ArcGIS for Silverlight.
I'm trying to create map that contains a base map, a polygon layer and a point layer. And i want to identify the point features.
I can see the layers. But whenever i click on the points, i get this error message:
[ATTACH=CONFIG]22594[/ATTACH]
Here is the mainpage.xaml:

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"     xmlns:esri="http://schemas.esri.com/arcgis/client/2009"     xmlns:slData="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"     xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"     mc:Ignorable="d"     d:DesignHeight="300" d:DesignWidth="400">      <Grid x:Name="LayoutRoot" Background="White" >          <Grid.Resources>             <esri:PictureMarkerSymbol x:Key="DefaultPictureSymbol" OffsetX="35" OffsetY="35"                   Source="/Assets/images/i_about.png" />             <esri:SimpleRenderer x:Key="MySimplePolygonRenderer">             <esri:SimpleRenderer.Symbol>                 <esri:SimpleFillSymbol Fill="Green">                 </esri:SimpleFillSymbol>             </esri:SimpleRenderer.Symbol>             </esri:SimpleRenderer>             <esri:SimpleRenderer x:Key="MySimplePolylineRenderer">                 <esri:SimpleRenderer.Symbol>                     <esri:SimpleLineSymbol Color="Red">                     </esri:SimpleLineSymbol>                 </esri:SimpleRenderer.Symbol>             </esri:SimpleRenderer>             <esri:SimpleRenderer x:Key="MySimpleMarker">                 <esri:SimpleRenderer.Symbol>                     <esri:SimpleMarkerSymbol Color="Red" Style="Circle"></esri:SimpleMarkerSymbol>                 </esri:SimpleRenderer.Symbol>              </esri:SimpleRenderer>         </Grid.Resources>          <esri:Map x:Name="MyMap" WrapAround="True" Background="White"                     Extent="406252.2726,4543357.5695,407437.2354,4544741.7271" MouseClick="QueryPoint_MouseClick" >             <esri:ArcGISDynamicMapServiceLayer ID="Uydu2011"                       Url="http://ibbmaps.ibb.gov.tr/maps/rest/services/Uydu_2011_ED50/MapServer"/>             <esri:FeatureLayer ID="Binalar"                       Url="http://services1.arcgis.com/woiXiLpMPLtJh7WJ/arcgis/rest/services/binalar/FeatureServer/0"                       Renderer="{StaticResource MySimplePolygonRenderer}"/>             <esri:FeatureLayer ID="Noktalar"                       Url="http://services1.arcgis.com/woiXiLpMPLtJh7WJ/arcgis/rest/services/noktalar/FeatureServer/0"                       Renderer="{StaticResource MySimpleMarker}"/> <esri:GraphicsLayer ID="MyGraphicsLayer" />         </esri:Map>         <Border x:Name="IdentifyBorder" Background="#77919191" BorderThickness="1" CornerRadius="5"                 HorizontalAlignment="Right" BorderBrush="Gray" VerticalAlignment="Top"                  Margin="5">             <Border.Effect>                 <DropShadowEffect/>             </Border.Effect>             <Grid x:Name="IdentifyGrid" HorizontalAlignment="Right" VerticalAlignment="Top" >                 <Grid.RowDefinitions>                     <RowDefinition Height="30" />                     <RowDefinition Height="*" />                 </Grid.RowDefinitions>                 <TextBlock x:Name="DataDisplayTitleBottom" Text="?lçe Sorgulamak ?çin Haritaya T?klay?n?z"                         Foreground="White" FontSize="10" Grid.Row="0"                                              Margin="15,5,15,1" HorizontalAlignment="Center" >                     <TextBlock.Effect>                         <DropShadowEffect />                                               </TextBlock.Effect>                 </TextBlock>                 <Grid x:Name="IdentifyResultsPanel" Margin="5,1,5,5" HorizontalAlignment="Center"                              VerticalAlignment="Top" Visibility="Collapsed" Grid.Row="1">                     <Grid.RowDefinitions>                         <RowDefinition Height="30" />                         <RowDefinition Height="*" />                     </Grid.RowDefinitions>                     <ComboBox x:Name="IdentifyComboBox" SelectionChanged="cb_SelectionChanged"                          Margin="5,1,5,5" Grid.Row="0">                     </ComboBox>                     <ScrollViewer HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Auto"                            Width="230" MinHeight="200" Grid.Row="1">                         <slData:DataGrid x:Name="IdentifyDetailsDataGrid" AutoGenerateColumns="False" HeadersVisibility="None"                                Background="White">                             <slData:DataGrid.Columns>                                 <slData:DataGridTextColumn Binding="{Binding Path=Key}" FontWeight="Bold"/>                                 <slData:DataGridTextColumn Binding="{Binding Path=Value}"/>                             </slData:DataGrid.Columns>                         </slData:DataGrid>                     </ScrollViewer>                 </Grid>             </Grid>         </Border>          <Border Background="#77919191" BorderThickness="1" CornerRadius="5"             HorizontalAlignment="Left"  VerticalAlignment="Top"             Margin="20" Padding="5" BorderBrush="Black" >             <ListBox x:Name="MyList" ItemsSource="{Binding ElementName=MyMap, Path=Layers}">                 <ListBox.ItemTemplate>                     <DataTemplate>                         <StackPanel Orientation="Horizontal">                             <!--Layer visibility checkbox-->                             <CheckBox IsChecked="{Binding Visible, Mode=TwoWay}" />                             <!--Opacity slider-->                             <Slider Margin="-5,0,0,0" Minimum="0" Maximum="1" Width="30"                                  Value="{Binding Opacity, Mode=TwoWay}" Height="18" />                             <!--Layer name-->                             <TextBlock Text="{Binding ID, Mode=OneWay}" Margin="5,0,0,0" >                              <!-- Tooltip on hover-->                                 <ToolTipService.ToolTip>                                     <StackPanel MaxWidth="400">                                         <TextBlock FontWeight="Bold" Text="{Binding CopyrightText}" TextWrapping="Wrap" />                                         <TextBlock Text="{Binding Description}" TextWrapping="Wrap" />                                     </StackPanel>                                 </ToolTipService.ToolTip>                             </TextBlock>                         </StackPanel>                     </DataTemplate>                 </ListBox.ItemTemplate>             </ListBox>         </Border>     </Grid>  </UserControl>

Re: Identify Problem

TolgaBakirman — Fri, 10 Dec 2021 20:38:52 GMT

Here is the mainpage.xaml.cs :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Tasks;

namespace SilverlightApplication11
{
    public partial class MainPage : UserControl
    {
         private List<DataItem> _dataItems = null;

        public MainPage()
        {
            InitializeComponent();
        }

        private void QueryPoint_MouseClick(object sender, ESRI.ArcGIS.Client.Map.MouseEventArgs e)
        {
            ESRI.ArcGIS.Client.Geometry.MapPoint clickPoint = e.MapPoint;

            ESRI.ArcGIS.Client.Tasks.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://services1.arcgis.com/woiXiLpMPLtJh7WJ/arcgis/rest/services/noktalar/FeatureServer");
            identifyTask.ExecuteCompleted += IdentifyTask_ExecuteCompleted;
            identifyTask.Failed += IdentifyTask_Failed;
            identifyTask.ExecuteAsync(identifyParams);

            GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
            graphicsLayer.ClearGraphics();
            ESRI.ArcGIS.Client.Graphic graphic = new ESRI.ArcGIS.Client.Graphic()
            {
                Geometry = clickPoint,
                Symbol = LayoutRoot.Resources["DefaultPictureSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol
            };
            graphicsLayer.Graphics.Add(graphic);
        }

        public void ShowFeatures(List<IdentifyResult> results)
        {
            _dataItems = new List<DataItem>();

            if (results != null && results.Count > 0)
            {
                IdentifyComboBox.Items.Clear();
                foreach (IdentifyResult result in results)
                {
                    Graphic feature = result.Feature;
                    string title = result.Value.ToString() + " (" + result.LayerName + ")";
                    _dataItems.Add(new DataItem()
                    {
                        Title = title,
                        Data = feature.Attributes
                    });
                    IdentifyComboBox.Items.Add(title);
                }
                IdentifyComboBox.SelectedIndex = 0;
            }
        }

        void cb_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            int index = IdentifyComboBox.SelectedIndex;
            if (index > -1)
                IdentifyDetailsDataGrid.ItemsSource = _dataItems[index].Data;
        }

        private void IdentifyTask_ExecuteCompleted(object sender, IdentifyEventArgs args)
        {
            IdentifyDetailsDataGrid.ItemsSource = null;

            if (args.IdentifyResults != null && args.IdentifyResults.Count > 0)
            {
                IdentifyResultsPanel.Visibility = Visibility.Visible;

                ShowFeatures(args.IdentifyResults);
            }
            else
            {
                IdentifyComboBox.Items.Clear();
                IdentifyComboBox.UpdateLayout();

                IdentifyResultsPanel.Visibility = Visibility.Collapsed;
            }
        }

        public class DataItem
        {
            public string Title { get; set; }
            public IDictionary<string, object> Data { get; set; }
        }

        void IdentifyTask_Failed(object sender, TaskFailedEventArgs e)
        {
            MessageBox.Show("Identify failed. Error: " + e.Error);
        }

    }
}

Thanks,

Tolga

Re: Identify Problem

JohanCarlsson — Fri, 22 Mar 2013 06:37:07 GMT

You haven't specified a layerId in your Url. Try querying

http://services1.arcgis.com/woiXiLpMPLtJh7WJ/ArcGIS/rest/services/noktalar/FeatureServer/0

Re: Identify Problem

DominiqueBroux — Fri, 22 Mar 2013 11:49:21 GMT

Identify is available on MapServer and ImageServer but not on FeatureServer that doesn't support it.

As the features are loaded locally, we don't need to request the server to get infos about them. Instead you can use MapTips that work locally.
Samples:
- http://resources.arcgis.com/en/help/silverlight-api/samples/start.htm#GraphicsMapTip
- http://resources.arcgis.com/en/help/silverlight-api/samples/start.htm#MapTipWidget

Re: Identify Problem

TolgaBakirman — Fri, 22 Mar 2013 14:29:35 GMT

Thanks,

Using MapServer solved my problem.

Regards,