Find

This sample demonstrates using the ArcGIS Runtime SDK for WPF to perform find operations on local data. To use the sample, specify a search string in the TextBox Control and click the Find Button. Click on rows in the DataGrid at the bottom of the application to see them in the map.

In the code-behind, the sample uses a FindTask to perform the find operation on local data. The task's find parameters specify to search specific layers and fields in the local data.

XAML

<UserControl x:Class="ArcGISWPFSDK.LocalFind"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:esri="http://schemas.esri.com/arcgis/client/2009">
    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.Resources>
            <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
            <esri:SimpleMarkerSymbol x:Key="DefaultMarkerSymbol" Size="8" Color="Red" Style="Circle" />
            <esri:SimpleLineSymbol x:Key="DefaultLineSymbol" Color="Red" Width="6"  />
            <esri:SimpleFillSymbol x:Key="DefaultFillSymbol" BorderBrush="Red" BorderThickness="2" Fill="#50FF0000"/>
            <LinearGradientBrush x:Key="PanelGradient" EndPoint="0.5,1" StartPoint="0.5,0">
                <LinearGradientBrush.RelativeTransform>
                    <TransformGroup>
                        <ScaleTransform CenterY="0.5" CenterX="0.5"/>
                        <SkewTransform CenterY="0.5" CenterX="0.5"/>
                        <RotateTransform Angle="176" CenterY="0.5" CenterX="0.5"/>
                        <TranslateTransform/>
                    </TransformGroup>
                </LinearGradientBrush.RelativeTransform>
                <GradientStop Color="#FF145787" Offset="0.16"/>
                <GradientStop Color="#FF3D7FAC" Offset="0.502"/>
                <GradientStop Color="#FF88C5EF" Offset="0.984"/>
            </LinearGradientBrush>
        </Grid.Resources>
        <Grid.RowDefinitions>
            <RowDefinition Height="35" />
            <RowDefinition Height="*" />
            <RowDefinition Height="150" />
        </Grid.RowDefinitions>

        <StackPanel Orientation="Horizontal" Background="{StaticResource PanelGradient}" HorizontalAlignment="stretch" VerticalAlignment="Top" Height="35" >
            <TextBlock Text="Search for" Foreground="White" 
                           HorizontalAlignment="Center" Height="24" VerticalAlignment="Center" 
                           FontWeight="Bold" FontSize="12" Margin="20,8,5,0"/>
            <TextBox x:Name="FindText" Background="White" Text="Colorado" Height="23" Width="100" HorizontalContentAlignment="Center" />
            <TextBlock Text="in the attributes of States or Cities:" Foreground="White" 
                           HorizontalAlignment="Center" Height="24" VerticalAlignment="Center" 
                           FontWeight="Bold" FontSize="12" Margin="5,8,5,0"/>
            <Button x:Name="ExecuteButton" Content="Find" Width="75" Height="24" VerticalAlignment="Center" Click="ExecuteButton_Click" IsEnabled="False"  
                        Margin="5,0,5,0" Cursor="Hand" />
        </StackPanel>

        <esri:Map x:Name="MyMap" MinimumResolution="2445.98490512499" WrapAround="True" Extent="-15000000,2000000,-7000000,8000000" Background="#FFE3E3E3" Grid.Row="1">
            <esri:ArcGISLocalTiledLayer ID="BaseMap" Path="..\\Data\\TPKs\\Topographic.tpk"/>
            <esri:ArcGISLocalDynamicMapServiceLayer Path="..\\Data\\MPKS\\USCitiesStates.mpk"/>
            <esri:GraphicsLayer ID="MyGraphicsLayer" />
        </esri:Map>
        <DataGrid x:Name="FindDetailsDataGrid" AutoGenerateColumns="False" HeadersVisibility="All" Background="White"
                         BorderBrush="Black" BorderThickness="1" SelectionChanged="FindDetails_SelectionChanged" 
                         HorizontalScrollBarVisibility="Hidden" Grid.Row="2"
                         IsReadOnly="True" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" 
                         Height="Auto" Width="Auto">
            <DataGrid.Columns>
                <DataGridTextColumn Binding="{Binding Path=LayerId}" Header="Layer ID" />
                <DataGridTextColumn Binding="{Binding Path=LayerName}" Header="Layer Name"/>
                <DataGridTextColumn Binding="{Binding Path=FoundFieldName}" Header="Found Field Name" />
                <DataGridTextColumn Binding="{Binding Path=Value}" Header="Found Field Value"/>
            </DataGrid.Columns>
        </DataGrid>
        <ProgressBar x:Name="MyProgressBar" IsIndeterminate="True" VerticalAlignment="Bottom" Width="200" Height="20" Margin="10" Visibility="{Binding Path=IsBusy, Converter={StaticResource BooleanToVisibilityConverter}}"></ProgressBar>
    </Grid>
</UserControl>

C#

using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Tasks;
using ESRI.ArcGIS.Client.Local;
using System.ComponentModel;


namespace ArcGISWPFSDK
{
    public partial class LocalFind : UserControl, INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        private bool _isBusy = true;

        public bool IsBusy
        {
            get
            {
                return _isBusy;
            }
            set
            {
                _isBusy = value;

                if (PropertyChanged != null)
                {

                    PropertyChanged(this, new PropertyChangedEventArgs("IsBusy"));
                }
            }
        }   
    
        LocalMapService _mapService;

        public LocalFind()
        {
            InitializeComponent();

            LocalMapService.GetServiceAsync("..\\Data\\MPKS\\USCitiesStates.mpk", (localMapService) =>
            {
                _mapService = localMapService;
                ExecuteButton.IsEnabled = true;
                DataContext = this;
                IsBusy = false;
            });
        }

        private void ExecuteButton_Click(object sender, RoutedEventArgs e)
        {
            GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
            graphicsLayer.ClearGraphics();
            FindTask findTask = new FindTask();
            findTask.Url = _mapService.UrlMapService;
            findTask.Failed += FindTask_Failed;
            FindParameters findParameters = new FindParameters();
            findParameters.LayerIds.AddRange(new int[] { 0, 2 });
            findParameters.SearchFields.AddRange(new string[] { "AREANAME", "CAPITAL", "POP2000", "STATE_NAME" });
            Binding resultFeaturesBinding = new Binding("LastResult");
            resultFeaturesBinding.Source = findTask;
            FindDetailsDataGrid.SetBinding(DataGrid.ItemsSourceProperty, resultFeaturesBinding);
            findParameters.SearchText = FindText.Text;
            findTask.ExecuteAsync(findParameters);
        }

        private void FindDetails_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            DataGrid dataGrid = sender as DataGrid;
            int selectedIndex = dataGrid.SelectedIndex;
            if (selectedIndex > -1)
            {
                FindResult findResult = (FindResult)FindDetailsDataGrid.SelectedItem;
                Graphic graphic = findResult.Feature;
                switch (graphic.Attributes["Shape"].ToString())
                {
                    case "Polygon":
                        graphic.Symbol = LayoutRoot.Resources["DefaultFillSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol;
                        break;
                    case "Polyline":
                        graphic.Symbol = LayoutRoot.Resources["DefaultLineSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol;
                        break;
                    case "Point":
                        graphic.Symbol = LayoutRoot.Resources["DefaultMarkerSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol;
                        break;
                }
                GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
                graphicsLayer.ClearGraphics();
                graphicsLayer.Graphics.Add(graphic);
            }
        }

        private void FindTask_Failed(object sender, TaskFailedEventArgs args)
        {
            MessageBox.Show("Find failed: " + args.Error);
        }
    }
}

VB.NET

Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports ESRI.ArcGIS.Client
Imports ESRI.ArcGIS.Client.Tasks
Imports ESRI.ArcGIS.Client.Local
Imports System.ComponentModel

Namespace ArcGISWPFSDK
    Partial Public Class LocalFind
        Inherits UserControl
        Implements INotifyPropertyChanged
        Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
        Private _isBusy As Boolean = True
        Public Property IsBusy() As Boolean
            Get
                Return _isBusy
            End Get
            Set(value As Boolean)
                _isBusy = value

                RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs("IsBusy"))
            End Set
        End Property
        Private _mapService As LocalMapService

        Public Sub New()
            InitializeComponent()

            LocalMapService.GetServiceAsync("..\Data\MPKS\USCitiesStates.mpk", Function(localMapService__1)
                                                                                   _mapService = localMapService__1
                                                                                   ExecuteButton.IsEnabled = True
                                                                                   DataContext = Me
                                                                                   IsBusy = False
                                                                               End Function)
        End Sub

        Private Sub ExecuteButton_Click(sender As Object, e As RoutedEventArgs)
            Dim graphicsLayer As GraphicsLayer = TryCast(MyMap.Layers("MyGraphicsLayer"), GraphicsLayer)
            graphicsLayer.ClearGraphics()
            Dim findTask As New FindTask()
            findTask.Url = _mapService.UrlMapService
            AddHandler findTask.Failed, AddressOf FindTask_Failed
            Dim findParameters As New FindParameters()
            findParameters.LayerIds.AddRange(New Integer() {0, 2})
            findParameters.SearchFields.AddRange(New String() {"AREANAME", "CAPITAL", "POP2000", "STATE_NAME"})
            Dim resultFeaturesBinding As New Binding("LastResult")
            resultFeaturesBinding.Source = findTask
            FindDetailsDataGrid.SetBinding(DataGrid.ItemsSourceProperty, resultFeaturesBinding)
            findParameters.SearchText = FindText.Text
            findTask.ExecuteAsync(findParameters)
        End Sub

        Private Sub FindDetails_SelectionChanged(sender As Object, e As SelectionChangedEventArgs)
            Dim dataGrid As DataGrid = TryCast(sender, DataGrid)
            Dim selectedIndex As Integer = dataGrid.SelectedIndex
            If selectedIndex > -1 Then
                Dim findResult As FindResult = DirectCast(FindDetailsDataGrid.SelectedItem, FindResult)
                Dim graphic As Graphic = findResult.Feature
                Select Case graphic.Attributes("Shape").ToString()
                    Case "Polygon"
                        graphic.Symbol = TryCast(LayoutRoot.Resources("DefaultFillSymbol"), ESRI.ArcGIS.Client.Symbols.Symbol)
                        Exit Select
                    Case "Polyline"
                        graphic.Symbol = TryCast(LayoutRoot.Resources("DefaultLineSymbol"), ESRI.ArcGIS.Client.Symbols.Symbol)
                        Exit Select
                    Case "Point"
                        graphic.Symbol = TryCast(LayoutRoot.Resources("DefaultMarkerSymbol"), ESRI.ArcGIS.Client.Symbols.Symbol)
                        Exit Select
                End Select
                Dim graphicsLayer As GraphicsLayer = TryCast(MyMap.Layers("MyGraphicsLayer"), GraphicsLayer)
                graphicsLayer.ClearGraphics()
                graphicsLayer.Graphics.Add(graphic)
            End If
        End Sub

        Private Sub FindTask_Failed(sender As Object, args As TaskFailedEventArgs)
            MessageBox.Show("Find failed: " & Convert.ToString(args.[Error]))
        End Sub
    End Class
End Namespace