Switch Layers Online

This sample demonstrates how to change the Url of a single tiled map service layer at runtime. When a radio button is clicked, the code in the event handler is used to change the url of the layer.

XAML

<UserControl x:Class="ArcGISWPFSDK.SwitchMap"
   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">
        <esri:Map x:Name="MyMap" WrapAround="True" UseAcceleratedDisplay="True" Loaded="MyMap_Loaded">
            <esri:ArcGISTiledMapServiceLayer ID="AGOLayer" Visible="True" 
                    Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer" />
        </esri:Map>

        <Grid HorizontalAlignment="Right" Background="#CC919191" VerticalAlignment="Top" Margin="10" >
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Background="Transparent" Margin="5">
                <RadioButton x:Name="StreetsRadioButton" 
                         Tag="http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"
                         IsChecked="true" Margin="5,0,0,0" 
                         GroupName="Layers" Content="Streets" Click="RadioButton_Click"/>
                <RadioButton x:Name="TopoRadioButton" 
                         Tag="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer" 
                         Margin="5,0,0,0"  
                         GroupName="Layers" Content="Topo" Click="RadioButton_Click"/>
                <RadioButton x:Name="ImageryRadioButton" 
                         Tag="http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" 
                         Margin="5,0,0,0"  
                         GroupName="Layers" Content="Imagery" Click="RadioButton_Click"/>
            </StackPanel>
        </Grid>
    </Grid>
</UserControl>

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows;
using ESRI.ArcGIS.Client;
using System.Windows.Controls;

namespace ArcGISWPFSDK
{  
    public partial class SwitchMap : UserControl
    {
        public SwitchMap()
        {
            InitializeComponent();
        }
        private void RadioButton_Click(object sender, RoutedEventArgs e)
        {
            ArcGISTiledMapServiceLayer arcgisLayer = MyMap.Layers["AGOLayer"] as ArcGISTiledMapServiceLayer;
            MyMap.Layers.Remove(arcgisLayer);
            arcgisLayer = new ArcGISTiledMapServiceLayer() 
            {
                ID = "AGOLayer",
                Url = ((RadioButton)sender).Tag as string
            };
            MyMap.Layers.Add(arcgisLayer);
            
        }

        private void MyMap_Loaded(object sender, RoutedEventArgs e)
        {
            MyMap.Focus();
        }
    }
}

VB.NET

Imports System.Windows
Imports System.Windows.Controls
Imports ESRI.ArcGIS.Client

Namespace ArcGISWPFSDK
    Partial Public Class SwitchMap
        Inherits UserControl
        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub RadioButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
            Dim arcgisLayer As ArcGISTiledMapServiceLayer = TryCast(MyMap.Layers("AGOLayer"), ArcGISTiledMapServiceLayer)
            arcgisLayer.Url = TryCast((CType(sender, RadioButton)).Tag, String)
        End Sub

        Private Sub MyMap_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
            MyMap.Focus()
        End Sub
    End Class
End Namespace