Filtering a FeatureLayer

This sample demonstrates applying filters to a local feature layer. Filters allow you to retrieve a subset of records that match an attribute or spatial query. The sample includes two local feaure layers, one with an attribute filter and the other with a spatial filter. As the sample shows, an attribute filter is specified by defining a query in the local layer's Where property. A spatial filter is specified by defining the local layer's Geometry property.

XAML

<UserControl x:Class="ArcGISWPFSDK.LocalFeatureLayerFiltering"
    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">
        <Grid.Resources>
            <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
            <esri:SimpleRenderer x:Key="MySimplePointRenderer">
                <esri:SimpleRenderer.Symbol>
                    <esri:SimpleMarkerSymbol Color="Orange"/>
                </esri:SimpleRenderer.Symbol>
            </esri:SimpleRenderer>
            <esri:SimpleRenderer x:Key="MySimplePolygonRenderer">
                <esri:SimpleRenderer.Symbol>
                    <esri:SimpleFillSymbol Fill="#440000FF"/>
                </esri:SimpleRenderer.Symbol>
            </esri:SimpleRenderer>
        </Grid.Resources>
        <esri:Map x:Name="MyMap" WrapAround="True" Extent="-15000000,2000000,-7000000,8000000" Background="#FFE3E3E3" MinimumResolution="2445.98490512499">
            <esri:Map.Layers>
                <esri:ArcGISLocalTiledLayer ID="TopoMapLayer"
                  Path="..\\Data\\TPKs\\Topographic.tpk"/>
                <esri:ArcGISLocalFeatureLayer ID="States" LayerName="States" Path="..\\Data\\MPKS\\USCitiesStates.mpk"
                    Renderer="{StaticResource MySimplePolygonRenderer}">
                    <esri:ArcGISLocalFeatureLayer.Geometry>
                        <esri:Envelope XMin="-12330709" YMin="-13610919" XMax="8242944" YMax="8326892" >
                        </esri:Envelope>
                    </esri:ArcGISLocalFeatureLayer.Geometry>
                </esri:ArcGISLocalFeatureLayer>
                <esri:ArcGISLocalFeatureLayer ID="Cities" LayerName="Cities" 
                   Path="..\\Data\\MPKS\\USCitiesStates.mpk"
                    Where="POP2007 > 1000000" Renderer="{StaticResource MySimplePointRenderer}">
                </esri:ArcGISLocalFeatureLayer>
            </esri:Map.Layers>
        </esri:Map>
        <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.Controls;
using System.ComponentModel;

namespace ArcGISWPFSDK
{
    public partial class LocalFeatureLayerFiltering : 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"));
                }
            }
        }    
    
        public LocalFeatureLayerFiltering()
        {
            InitializeComponent();

            DataContext = this;

            MyMap.Layers.LayersInitialized += (o, evt) =>
            {
                IsBusy = false;

            };
        }
    }
}

VB.NET

Imports System.Windows.Controls
Imports System.ComponentModel


Namespace ArcGISWPFSDK
    Partial Public Class LocalFeatureLayerFiltering
        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
        Public Sub New()
            InitializeComponent()
            AddHandler MyMap.Layers.LayersInitialized, AddressOf map_LayersInitialized
        End Sub
        Private Sub map_LayersInitialized(sender As Object, e As EventArgs)
            DataContext = Me
            IsBusy = False
        End Sub
    End Class
End Namespace