Hi ,
I am using following code find out the nearest feature but i am always getting closestfeatureId as -1.
Please anyone help me how to resolve this issue
IFeatureSelection pFeatureSelection;
ISpatialFilter pSpatialfilter;
pSpatialfilter = new SpatialFilterClass();
ITopologicalOperator pTopoOp;
IGeometry pGeometry;
IMxDocument mxDocument;
IMap pMap;
IPoint pMapPoint;
IFeatureIndex2 pFeatureIndex = new FeatureIndexClass();
IIndexQuery2 pIndexquery;
IFeatureLayer pFLayer;
IFeatureLayer pFLayer1;
int closestFeature_id ;
double distance=1000;
IGeometry pGeometry1;
IFeature pNearestFeature;
IFeatureSelection pFeatSelection2;
IEnumFeature pEnumFeature;
IGeoDataset pGeodataset;
ESRI.ArcGIS.esriSystem.ITrackCancel pTrackcance = new CancelTracker();
ICursor pFeatCur;
try
{
mxDocument = m_application.Document as IMxDocument;
pMap = mxDocument.FocusMap;
pFLayer = pMap.get_Layer(0) as IFeatureLayer;
pMapPoint = new ESRI.ArcGIS.Geometry.Point();
pMapPoint = mxDocument.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
pTopoOp = pMapPoint as ITopologicalOperator ;
pGeometry = pTopoOp.Buffer(20);
pFeatureSelection = pFLayer as IFeatureSelection;
pSpatialfilter.GeometryField = pFLayer.FeatureClass.ShapeFieldName;
pSpatialfilter.Geometry = pGeometry;
pSpatialfilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
pFeatureSelection.SelectFeatures(pSpatialfilter, esriSelectionResultEnum.esriSelectionResultNew, false);
pGeometry1 = pMapPoint as IGeometry;
pFLayer1 = pMap.get_Layer(1) as IFeatureLayer;
pGeodataset=pFLayer1.FeatureClass as IGeoDataset ;
pFeatureIndex.FeatureClass = pFLayer1.FeatureClass;
pFeatureIndex.set_OutputSpatialReference(pFLayer1.FeatureClass.ShapeFieldName, pGeodataset.SpatialReference);
pFeatureIndex.Index(pTrackcance, pGeodataset.Extent);
pFeatureSelection.SelectionSet.Search(null, false, out pFeatCur);
IFeature Pfeature = pFeatCur.NextRow() as IFeature ;
pIndexquery = pFeatureIndex as IIndexQuery2;
if (pFeatureSelection.SelectionSet.Count != 0)
{
pGeometry1 = Pfeature.Shape;
pIndexquery.NearestFeature(pGeometry1, out closestFeature_id, out distance);
if (closestFeature_id != -1)
{
pNearestFeature = pFLayer1.FeatureClass.GetFeature(closestFeature_id);
if (pNearestFeature != null)
{
IQueryFilter pQueryFilter = new QueryFilterClass();
pQueryFilter.WhereClause = "FID=" + closestFeature_id;
pFeatSelection2 = pFLayer1 as IFeatureSelection;
pFeatSelection2.SelectFeatures(pQueryFilter, esriSelectionResultEnum.esriSelectionResultAdd, true);
mxDocument.ActiveView.Refresh();
}
}
}
}
catch (Exception exp)
{
MessageBox.Show(exp.Message);
}
// TODO: Add Proximity.O
