silverlight调用GP服务实现缓冲区

 

启发来源于http://blog.csdn.net/qq364981997/article/details/8769388

http://www.cnblogs.com/potential/archive/2012/11/03/2752289.html

 

写代码之前制作模型，这里使用的是ArcTutor\GP Service Examples\BufferPoints。

也可以根据http://help.arcgis.com/zh-cn/arcgisdesktop/10.0/help/index.html#//002v00000014000000自己做数据。做完之后测试一下。

前端代码：

<UserControl x:Class="GPBuffer.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 x:Name="MyMap" Background="White"            MouseClick="MyMap_MouseClick" >            <esri:ArcGISDynamicMapServiceLayer ID="buffer"                                               Url="http://localhost/arcgis/rest/services/bufferpoint/MapServer"/>            <esri:GraphicsLayer ID="MyGraphicsLayer">            </esri:GraphicsLayer>        </esri:Map>        <Grid HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,15,15,0" >            <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="InformationText" Text="Click on map to set a location. A buffer of 1000 meters will be displayed."                 Width="200" Margin="30,20,30,25" HorizontalAlignment="Left" TextWrapping="Wrap" />        </Grid>    </Grid></UserControl>

 

后台代码：

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;

using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Tasks;
using ESRI.ArcGIS.Client.Symbols;

namespace GPBuffer
{
    public partial class MainPage : UserControl
    {
        Geoprocessor _geoprocessorTask;
        public MainPage()
        {
            InitializeComponent();
            _geoprocessorTask = new Geoprocessor("http://localhost/arcgis/rest/services/bufferpoint/GPServer/Buffer%20Points");
            _geoprocessorTask.JobCompleted += new EventHandler<JobInfoEventArgs>(_geoprocessorTask_JobCompleted);
            _geoprocessorTask.GetResultDataCompleted += new EventHandler<GPParameterEventArgs>(_geoprocessorTask_GetResultDataCompleted);
            _geoprocessorTask.Failed += new EventHandler<TaskFailedEventArgs>(_geoprocessorTask_Failed);
        }

        void _geoprocessorTask_Failed(object sender, TaskFailedEventArgs e)
        {
            MessageBox.Show("请求服务失败:" + e.Error.ToString());
        }

        void _geoprocessorTask_GetResultDataCompleted(object sender, GPParameterEventArgs e)
        {
            GraphicsLayer graphicsLayer = new GraphicsLayer();
            GPFeatureRecordSetLayer featureSetLayer = e.Parameter as GPFeatureRecordSetLayer;
            foreach (Graphic graphic in featureSetLayer.FeatureSet.Features)
            {
                graphic.Symbol = LayoutRoot.Resources["DefaultBufferSymbol"] as Symbol;
                graphicsLayer.Graphics.Add(graphic);
            }
            MyMap.Layers.Add(graphicsLayer);
            MessageBox.Show("********************");
        }

        void _geoprocessorTask_JobCompleted(object sender, JobInfoEventArgs e)
        {
            if (e.JobInfo.JobStatus == esriJobStatus.esriJobFailed)
            {
                MessageBox.Show("请求服务失败："+e.JobInfo.Messages.ToString());
                return;
            }
            HttpWebRequest.RegisterPrefix("http://",System.Net.Browser.WebRequestCreator.ClientHttp);
            _geoprocessorTask.GetResultDataAsync(e.JobInfo.JobId, "Output_Polygons");
        }
       
        private void MyMap_MouseClick(object sender, ESRI.ArcGIS.Client.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);

            List<GPParameter> parameters = new List<GPParameter>();
            parameters.Add(new GPFeatureRecordSetLayer("Input_Points", e.MapPoint));
            parameters.Add(new GPLinearUnit("Distance", esriUnits.esriMeters,1000));

            _geoprocessorTask.SubmitJobAsync(parameters);
        }

        //void _geoprocessorTask_Failed(object sender, TaskFailedEventArgs e)
        //{
        //    MessageBox.Show("Geoprocessing service failed: " + e.Error);
        //}

        //void _geoprocessorTask_ExecuteCompleted(object sender, GPExecuteCompleteEventArgs e)
        //{
        //    GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;

        //    foreach (GPParameter parameter in e.Results.OutParameters)
        //    {
        //        if (parameter is GPFeatureRecordSetLayer)
        //        {
        //            GPFeatureRecordSetLayer gpLayer = parameter as GPFeatureRecordSetLayer;

        //            foreach (Graphic graphic in gpLayer.FeatureSet.Features)
        //            {
        //                graphic.Symbol = LayoutRoot.Resources["DefaultBufferSymbol"] as Symbol;
        //                graphicsLayer.Graphics.Add(graphic);
        //            }
        //        }
        //    }
        //}
    }
}

 

注释掉的是同步执行的方法，但是好像不管用

下图是Buffer  GP服务的详细信息。

结果：