SubLayer List Online

This sample contains a Map with one tiled map service layer and one dynamic map service layer. A layer list shows the layers (sublayers) within the dynamic map service and a visibility check box. Element binding in XAML is used to populate the ListBox contents and enable runtime interactivity between sublayers and UI elements in the layer list.

XAML

<UserControl x:Class="ArcGISWPFSDK.SubLayerList"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:esri="clr-namespace:ESRI.ArcGIS.Client;assembly=ESRI.ArcGIS.Client">
    <Grid x:Name="LayoutRoot" >
        <Grid.Resources>
            <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>

        <esri:Map x:Name="MyMap" WrapAround="True" Extent="-14930991.170,3611744.037,-11348896.882,5340571.181">
            <esri:ArcGISTiledMapServiceLayer ID="Street Map" 
                    Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Shaded_Relief/MapServer"/>
            <esri:ArcGISDynamicMapServiceLayer ID="DynamicLayerCalifornia" x:Name="DynamicLayerCalifornia"  
                    Url="http://serverapps.esri.com/ArcGIS/rest/services/California/MapServer" Initialized="ArcGISDynamicMapServiceLayer_Initialized"/>
        </esri:Map>

        <Border Background="{ StaticResource PanelGradient}" BorderThickness="1" CornerRadius="5"
                HorizontalAlignment="Right"  VerticalAlignment="Top"
                Margin="20" Padding="10" BorderBrush="Black" >
            <StackPanel>
                <TextBlock Text="Layers in California service" FontWeight="Bold" Foreground="White" />
                <ListBox x:Name="List" ItemsSource="{Binding ElementName=DynamicLayerCalifornia, Path=Layers, Mode=OneWay}" Background="#DDFFFFFF">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                                <CheckBox Margin="2" Content="{Binding Name, Mode=OneWay}" 
                                          IsChecked="{Binding DefaultVisibility, Mode=OneWay}" 
                                          Tag="DynamicLayerCalifornia"
                                          ClickMode="Press" Click="CheckBox_Click"  />
                            </StackPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>
        </Border>

    </Grid>
</UserControl>

C#

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;

namespace ArcGISWPFSDK
{
    public partial class SubLayerList : UserControl
    {
        Dictionary<string, int> _layerDictionary = new Dictionary<string, int>();

        public SubLayerList()
        {
            InitializeComponent();
        }

        private void CheckBox_Click(object sender, RoutedEventArgs e)
        {
            CheckBox tickedCheckBox = sender as CheckBox;

            string serviceName = tickedCheckBox.Tag.ToString();
            bool visible = (bool)tickedCheckBox.IsChecked;

            string layerName = (string)tickedCheckBox.Content;
            int layerIndex = _layerDictionary[layerName];

            ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer dynamicServiceLayer = MyMap.Layers[serviceName] as
                ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer;

            List<int> visibleLayerList =
                dynamicServiceLayer.VisibleLayers != null
                ? dynamicServiceLayer.VisibleLayers.ToList() : new List<int>();

            if (visible)
            {
                if (!visibleLayerList.Contains(layerIndex))
                    visibleLayerList.Add(layerIndex);
            }
            else
            {
                if (visibleLayerList.Contains(layerIndex))
                    visibleLayerList.Remove(layerIndex);
            }

            dynamicServiceLayer.VisibleLayers = visibleLayerList.ToArray();
        }

        private void ArcGISDynamicMapServiceLayer_Initialized(object sender, EventArgs e)
        {
            ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer dynamicServiceLayer =
                sender as ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer;
            if (dynamicServiceLayer.VisibleLayers == null)
                dynamicServiceLayer.VisibleLayers = GetDefaultVisibleLayers(dynamicServiceLayer);
        }

        private int[] GetDefaultVisibleLayers(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer dynamicService)
        {
            List<int> visibleLayerIDList = new List<int>();

            ESRI.ArcGIS.Client.LayerInfo[] layerInfoArray = dynamicService.Layers;

            for (int index = 0; index < layerInfoArray.Length; index++)
            {
                _layerDictionary.Add(layerInfoArray[index].Name, layerInfoArray[index].ID);

                if (layerInfoArray[index].DefaultVisibility)
                    visibleLayerIDList.Add(index);
            }
            return visibleLayerIDList.ToArray();
        }
    }
}

VB.NET

Imports System.Collections.Generic
Imports System.Linq
Imports System.Net
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Shapes

Namespace ArcGISWPFSDK
    Partial Public Class SubLayerList
        Inherits UserControl
        Private _layerDictionary As New Dictionary(Of String, Integer)()

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub CheckBox_Click(sender As Object, e As RoutedEventArgs)
            Dim tickedCheckBox As CheckBox = TryCast(sender, CheckBox)

            Dim serviceName As String = tickedCheckBox.Tag.ToString()
            Dim visible As Boolean = CBool(tickedCheckBox.IsChecked)

            Dim layerName As String = DirectCast(tickedCheckBox.Content, String)
            Dim layerIndex As Integer = _layerDictionary(layerName)

            Dim dynamicServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer = TryCast(MyMap.Layers(serviceName), ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)

            Dim visibleLayerList As List(Of Integer) = If(dynamicServiceLayer.VisibleLayers IsNot Nothing, dynamicServiceLayer.VisibleLayers.ToList(), New List(Of Integer)())

            If visible Then
                If Not visibleLayerList.Contains(layerIndex) Then
                    visibleLayerList.Add(layerIndex)
                End If
            Else
                If visibleLayerList.Contains(layerIndex) Then
                    visibleLayerList.Remove(layerIndex)
                End If
            End If

            dynamicServiceLayer.VisibleLayers = visibleLayerList.ToArray()
        End Sub

        Private Sub ArcGISDynamicMapServiceLayer_Initialized(sender As Object, e As EventArgs)
            Dim dynamicServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer = TryCast(sender, ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
            If dynamicServiceLayer.VisibleLayers Is Nothing Then
                dynamicServiceLayer.VisibleLayers = GetDefaultVisibleLayers(dynamicServiceLayer)
            End If
        End Sub

        Private Function GetDefaultVisibleLayers(dynamicService As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer) As Integer()
            Dim visibleLayerIDList As New List(Of Integer)()

            Dim layerInfoArray As ESRI.ArcGIS.Client.LayerInfo() = dynamicService.Layers

            For index As Integer = 0 To layerInfoArray.Length - 1
                _layerDictionary.Add(layerInfoArray(index).Name, layerInfoArray(index).ID)

                If layerInfoArray(index).DefaultVisibility Then
                    visibleLayerIDList.Add(index)
                End If
            Next
            Return visibleLayerIDList.ToArray()
        End Function
    End Class
End Namespace