Bonjour.
je vous présente mon code XAML et mon C#.
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   <!--Overview Map-->
        <StackPanel Grid.Row="1" Margin="0,160,5,0" Width="215" Canvas.ZIndex="200" Background="DarkGreen" Orientation="Vertical" VerticalAlignment="Top" HorizontalAlignment="Right" Height="200">
            <TextBlock Text="Overview Map" Foreground="White" FontSize="14" FontWeight="Bold" Margin="4" />
            <esri:OverviewMap  Name="overviewMap1" Height="165" Width="210"  MaximumExtent="-17376276,-11584184.511,18941707,14401959" Map="{Binding ElementName=MyMap}">
                <esri:ArcGISTiledMapServiceLayer ID="OVImageLayer" Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer"/>
             </esri:OverviewMap>
        </StackPanel>
puis C#
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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  private void RadioButton_Click(object sender, RoutedEventArgs e)
        {
            int index = Convert.ToInt32(((RadioButton)sender).Tag);

            //ArcGISTiledMapServiceLayer baseMap = MyMap.Layers["BaseMap"] as ArcGISTiledMapServiceLayer;
            ArcGISTiledMapServiceLayer OvbaseMap = MyMap.Layers["OVImageLayer"] as ArcGISTiledMapServiceLayer;
           
            switch (index)
            {
                case 0:
                    //baseMap.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Shaded_Relief/MapServer";
                    OvbaseMap.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Shaded_Relief/MapServer";
                    break;

                case 1:
                    //baseMap.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer";
                    OvbaseMap.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer";
                   
                    break;

                case 2:
                    //baseMap.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer";
                    OvbaseMap.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer";
                    break;

            }

        }
le code C# me permet de passer d'une URL a une autre. Avec le control Map c'est possible. Mais celui de Overview Map il me demande qu'un seul.
Est ce possible de changer automatique de couche dans le Overview Map?