Форумы GIS-Lab.info

Код: Выделить всё

            #region для запроса
            Type factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBWorkspaceFactory");
            IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(factoryType);
            IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspaceFactory.OpenFromFile(@"C:\PI\California.gdb", 0);
            IFeatureClass featureClass = featureWorkspace.OpenFeatureClass("Cities");
            IFeature featureT = featureClass.CreateFeature();
            #endregion
            IGeometry pGeometry = null;
            IUnitConverter uc = new UnitConverterClass();
            double radius = uc.ConvertUnits(double.Parse(_tbRad.Text), esriUnits.esriMiles, esriUnits.esriDecimalDegrees);
            try
            {
                IMxDocument imxdocument = ArcMap.Document;
                ICircularArc arc = new CircularArcClass();
                arc.PutCoordsByAngle(point, 0, 2 * Math.PI, radius);

                IScreenDisplay screenDisplay = imxdocument.ActiveView.ScreenDisplay; 
                screenDisplay.StartDrawing(screenDisplay.hDC,
                (System.Int16)ESRI.ArcGIS.Display.esriScreenCache.esriNoScreenCache); 
                IRgbColor rgbColor = new ESRI.ArcGIS.Display.RgbColorClass();
                rgbColor.Red = 255;
                rgbColor.Transparency = 50;
                IColor color = rgbColor;

                ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass();
                simpleLineSymbol.Color = color;
                simpleLineSymbol.Width = 3;

                ISimpleMarkerSymbol simpleMarkerSymbol = new SimpleMarkerSymbolClass();
                simpleMarkerSymbol.Color = color;
                
                

                ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass();
                simpleFillSymbol.Color = color;

                object missing = Type.Missing;
                ISymbol symbol = (ESRI.ArcGIS.Display.ISymbol)simpleMarkerSymbol;

                // polygon
                ISegment pSegment = arc as ISegment;
                ISegmentCollection pSegColl = new PolygonClass();
                pSegColl.AddSegment(pSegment, ref missing, ref missing);
                pGeometry = pSegColl as IGeometry;
                symbol = (ESRI.ArcGIS.Display.ISymbol)simpleFillSymbol;

                var transparencyDisplayFilter = new TransparencyDisplayFilterClass
                {
                    Transparency = 127
                };

                screenDisplay.SetSymbol(symbol);
                screenDisplay.Filter = transparencyDisplayFilter;
                screenDisplay.DrawPolygon(pGeometry);
                screenDisplay.FinishDrawing();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            ISpatialFilter spatialFilter = new SpatialFilterClass()
            {
                Geometry = pGeometry, 
                GeometryField = featureClass.ShapeFieldName
                //SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects
            };
           
            IFeatureCursor featureCursor;
            featureCursor = featureClass.Search(spatialFilter, true);
            //comReleaser.ManageLifetime(featureCursor);
            IFeature feature = null;
            while ((feature = featureCursor.NextFeature()) != null)
            {
                MessageBox.Show(feature.Value[0].ToString());
//выводит ID элементов
            }