ArcGIS API for Silverlight 动态图层（ArcGISDynamicMapServiceLayer）的显示与隐藏

这里控制的是利用ArcGIS Server发布的ArcGISDynamicMapServiceLayer服务，下面的ListBox会加载所有服务图层，通过勾选可以动态控制某一个或某一些图层的显示与否。主要代码如下：

<esri:ArcGISDynamicMapServiceLayer ID="MyLayer"  Url="http://192.168.0.89/arcgis/rest/services/AnHuiMap/MapServer/"  Initialized="MyLayer_Initialized" />

<!--图层控制-->        <!--<Grid HorizontalAlignment="Right" Margin="0,260,0,0" Width="209" Height="200" VerticalAlignment="Top" >            <Grid.RowDefinitions>                <RowDefinition Height="0.205*"/>                <RowDefinition Height="0.795*"/>            </Grid.RowDefinitions>            <Grid.ColumnDefinitions>                <ColumnDefinition Width="0.837*"/>                <ColumnDefinition Width="0.163*"/>            </Grid.ColumnDefinitions>            <Border x:Name="bShowPicControl" BorderThickness="1"  Cursor="Hand"  Margin="1,0,0,1" Grid.Column="1" Width="33" MouseLeftButtonDown="bShowPicControl_MouseLeftButtonDown" MouseLeftButtonUp="bShowPicControl_MouseLeftButtonUp" Height="34">                <Border.Background>                    <ImageBrush ImageSource="Images/Layer_control.png" Stretch="None"/>                </Border.Background>                <ToolTipService.ToolTip>                    <TextBlock FontSize="13.333" FontFamily="Microsoft YaHei" >图 层 控 制</TextBlock>                </ToolTipService.ToolTip>            </Border>            <Grid x:Name="grid_control" Margin="0,1,0,0" Grid.RowSpan="2" Width="175" Height="199" Visibility="Collapsed">                <Grid Height="34" Background="#FFF3F3F3" Margin="0" Width="174" VerticalAlignment="Top" d:LayoutOverrides="Height">                    <Border BorderBrush="#FF0E529B" BorderThickness="1" CornerRadius="5" Height="34" Width="174">                        <StackPanel Orientation="Horizontal" Width="164" Height="32">                            <CheckBox x:Name="cb_ZM" Content="站 名" Margin="2,5,0,5" Width="54" FontSize="14.667" Cursor="Hand" FontFamily="Microsoft YaHei" VerticalAlignment="Center" HorizontalAlignment="Center" Height="18"  Checked="cb_ZM_Checked" Unchecked="cb_ZM_Unchecked"/>                            <RadioButton x:Name="rb1" Width="54" Margin="0,5" IsChecked="True" FontSize="14.667" Content="数 据" Height="18" GroupName="gn_group" Cursor="Hand" FontFamily="Microsoft YaHei" HorizontalAlignment="Center" VerticalAlignment="Center" Click="rb_Click"/>                            <RadioButton x:Name="rb2" Width="54" Margin="0,5" FontSize="14.667" Content="站 码" GroupName="gn_group" Cursor="Hand" FontFamily="Microsoft YaHei" HorizontalAlignment="Center" VerticalAlignment="Center" Click="rb_Click" Height="18"/>                        </StackPanel>                    </Border>                </Grid>                <Border Height="163" Margin="0,36,0,0"             Width="175" d:LayoutOverrides="GridBox" BorderBrush="#FF0E529B" CornerRadius="5" BorderThickness="1" >                    <ListBox ItemsSource="{Binding Layers.[MyLayer].Layers, ElementName=myMap}"             BorderBrush="{x:Null}" FontSize="13.333" FontFamily="Microsoft YaHei" Width="173" Height="161">                        <ListBox.ItemTemplate>                            <DataTemplate>                                <CheckBox Margin="2"            x:Name="MyLayer"            Content="{Binding Name}"             IsChecked="{Binding DefaultVisibility}"             Tag="{Binding ID}"            ClickMode="Press"             Click="CheckBox_Click" />                            </DataTemplate>                        </ListBox.ItemTemplate>                    </ListBox>                </Border>            </Grid>        </Grid>-->

#region 图层控制显示与隐藏        private void MyLayer_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++)            {                if (layerInfoArray[index].DefaultVisibility)                    visibleLayerIDList.Add(index);            }            return visibleLayerIDList.ToArray();        }        private void CheckBox_Click(object sender, RoutedEventArgs e)        {            CheckBox tickedCheckBox = sender as CheckBox;            string serviceName = tickedCheckBox.Name;            bool visible = (bool)tickedCheckBox.IsChecked;            int layerIndex = (int)tickedCheckBox.Tag;            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();        }        #endregion