在Silverlight中通过WCF和ArcGIS SDE获取图层中的属性和要素List

本文在Silverlight中通过WCF和ArcGIS SDE获取图层中的属性和要素列表。

应用程序：Silverlight

方法：WCF，通过ArcSDE读取医院图层地理要素

 

结果如下：

 

 

结果：

 

 

步骤：

新建WCF：MyGeometryService.svc，如下：

IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)pWorkspace;

            IFeatureDataset featureDataset = featureWorkspace.OpenFeatureDataset("SDE.shanghai");

            //IFeatureClassContainer featureClassContainer = (IFeatureClassContainer)featureDataset;
            IFeatureWorkspace fws = featureDataset.Workspace as IFeatureWorkspace;

            string layerName = "SDE.Hospital";

            IFeatureClass featureClass = fws.OpenFeatureClass(layerName);
            //IFeatureClass featureClass = featureLayer.FeatureClass;

            IQueryFilter queryFilter = new QueryFilterClass();
            queryFilter.WhereClause = "CN_NAME LIKE '%区%'";
            queryFilter.SubFields = "CN_NAME";
            int fieldPosition = featureClass.FindField("CN_NAME");
            IFeatureCursor featureCursor = featureClass.Search(null, true);
            IFeature feature = null;
            StringBuilder sb = new StringBuilder();
            while ((feature = featureCursor.NextFeature()) != null)
            {
                //geoString += feature.get_Value(fieldPosition).ToString();
                sb.Append(feature.get_Value(fieldPosition).ToString());
            }
            return sb.ToString();

 

步骤二：引用WCF并调用该服务：

如下：

 

 private void btnMyGeometryService_Click(object sender, RoutedEventArgs e)
        {
            

            MyGeometryService.MyGeometryServiceClient client = new MyGeometryService.MyGeometryServiceClient();
           
            client.GetGeoStringCompleted += new EventHandler<MyGeometryWCFServiceApp.MyGeometryService.GetGeoStringCompletedEventArgs>(client_GetGeoStringCompleted);
            client.GetGeoStringAsync();
        }

        void client_GetGeoStringCompleted(object sender, MyGeometryWCFServiceApp.MyGeometryService.GetGeoStringCompletedEventArgs e)
        {    
            txtGeoString.Text = e.Result;
            

        }