silverlight调用Geometry服务实现缓冲区

Geometry服务发布：

前端代码：

<UserControl x:Class="SilverlightApplication5.MainPage"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"                 xmlns:esri="http://schemas.esri.com/arcgis/client/2009"    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"    mc:Ignorable="d"    d:DesignHeight="300" d:DesignWidth="400">    <Grid x:Name="LayoutRoot" Background="White">        <Grid.Resources>            <esri:PictureMarkerSymbol x:Key="DefaultClickSymbol" OffsetX="11" OffsetY="39" Source="/car-red-16x16.png" />            <esri:SimpleFillSymbol x:Key="DefaultBufferSymbol" Fill="#660000FF" BorderBrush="Blue" BorderThickness="2"  />        </Grid.Resources>        <esri:Map Name="MyMap" MouseClick="Buffer_MouseClick"  Extent="-122.5009,37.741,-122.3721,37.8089">            <esri:ArcGISTiledMapServiceLayer ID="ESRIMap" Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>            <esri:GraphicsLayer ID="MyGraphicsLayer">                            </esri:GraphicsLayer>        </esri:Map>        <Grid HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,10,10,0" >            <Rectangle Fill="#77919191" Stroke="Gray"  RadiusX="10" RadiusY="10" Margin="0,0,0,5" >                <Rectangle.Effect>                    <DropShadowEffect/>                </Rectangle.Effect>            </Rectangle>            <Rectangle Fill="#FFFFFFFF" Stroke="DarkGray" RadiusX="5" RadiusY="5" Margin="10,10,10,15" />            <TextBlock x:Name="InformationTextBlock" Text="Click on map to set a location. A buffer of 5 miles will be displayed."                        Width="200" TextAlignment="Left" Margin="30,20,25,30" TextWrapping="Wrap" />        </Grid>    </Grid></UserControl>

 

后台代码：

private void ArcGISDynamicMapServiceLayer_InitializationFailed(object sender, EventArgs e)        {            Layer layer = sender as Layer;            MessageBox.Show(layer.InitializationFailure.Message);        }        private void Buffer_MouseClick(object sender, Map.MouseEventArgs e)        {            GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;            graphicsLayer.ClearGraphics();            e.MapPoint.SpatialReference = MyMap.SpatialReference;            Graphic graphic = new Graphic()            {                Geometry = e.MapPoint,                Symbol = LayoutRoot.Resources["DefaultClickSymbol"] as Symbol            };            graphic.SetZIndex(1);            graphicsLayer.Graphics.Add(graphic);            GeometryService geometryService = new GeometryService("http://localhost/arcgis/rest/services/Geometry/GeometryServer");            geometryService.BufferCompleted += new EventHandler<GraphicsEventArgs>(geometryService_BufferCompleted);            geometryService.Failed += new EventHandler<TaskFailedEventArgs>(geometryService_Failed);            BufferParameters bufferParams = new BufferParameters() {                 Unit=LinearUnit.StatuteMile,                BufferSpatialReference=new ESRI.ArcGIS.Client.Geometry.SpatialReference(4326),                OutSpatialReference=MyMap.SpatialReference            };            bufferParams.Features.Add(graphic);            bufferParams.Distances.Add(1);            geometryService.BufferAsync(bufferParams);        }        void geometryService_Failed(object sender, TaskFailedEventArgs e)        {            MessageBox.Show("Geometry ServiceException error:"+e.Error);        }        void geometryService_BufferCompleted(object sender, GraphicsEventArgs e)        {            IList<Graphic> result = e.Results;            GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;            foreach (Graphic graphic in result)            {                graphic.Symbol = LayoutRoot.Resources["DefaultBufferSymbol"] as Symbol;                graphicsLayer.Graphics.Add(graphic);            }        }

 

结果：