public Task <IFeature> NextFeature() { if (_layer == null) { return(Task.FromResult <IFeature>(null)); } OSGeo_v1.OGR.Feature ogrfeature = _layer.GetNextFeature(); if (ogrfeature == null) { return(Task.FromResult <IFeature>(null)); } Feature feature = new Feature(); feature.OID = (int)ogrfeature.GetFID(); OSGeo_v1.OGR.FeatureDefn defn = ogrfeature.GetDefnRef(); int fieldCount = defn.GetFieldCount(); for (int i = 0; i < fieldCount; i++) { OSGeo_v1.OGR.FieldDefn fdefn = defn.GetFieldDefn(i); FieldValue fv = new FieldValue(fdefn.GetName()); string fieldType = fdefn.GetFieldTypeName(fdefn.GetFieldType()).ToLower(); switch (fieldType) { case "integer": fv.Value = ogrfeature.GetFieldAsInteger(i); break; case "real": fv.Value = ogrfeature.GetFieldAsDouble(i); break; default: //if (fv.Name == "geom") //{ // var geom = ogrfeature.GetFieldAsString(i).ToByteArray(); // if (geom != null) // { // feature.Shape = gView.Framework.OGC.OGC.WKBToGeometry(geom); // } //} //else { fv.Value = ogrfeature.GetFieldAsString(i); } break; } feature.Fields.Add(fv); } if (feature.Shape == null) { OSGeo_v1.OGR.Geometry geom = ogrfeature.GetGeometryRef(); if (geom != null) { feature.Shape = gView.Framework.OGC.GML.GeometryTranslator.GML2Geometry(geom.ExportToGML(), GmlVersion.v1); } } return(Task.FromResult <IFeature>(feature)); }
public FeatureClassV1(Dataset dataset, OSGeo_v1.OGR.Layer layer) { _dataset = dataset; _ogrLayer = layer; OSGeo_v1.OGR.FeatureDefn defn = layer.GetLayerDefn(); _name = defn.GetName(); if (dataset.ConnectionString.ToLower().EndsWith(".dxf")) { try { System.IO.FileInfo fi = new System.IO.FileInfo(dataset.ConnectionString); _name = fi.Name; } catch { } } _fields = new Fields(); for (int i = 0; i < defn.GetFieldCount(); i++) { OSGeo_v1.OGR.FieldDefn fdefn = defn.GetFieldDefn(i); Field field = new Field(fdefn.GetName()); switch (fdefn.GetFieldTypeName(fdefn.GetFieldType()).ToLower()) { case "integer": if (_idFieldName == String.Empty) { _idFieldName = field.name; } field.type = FieldType.integer; break; case "real": field.type = FieldType.Double; break; case "string": field.type = FieldType.String; field.size = fdefn.GetWidth(); break; } _fields.Add(field); } _countFeatures = (int)layer.GetFeatureCount(1); OSGeo_v1.OGR.Envelope env = new OSGeo_v1.OGR.Envelope(); layer.GetExtent(env, 1); _envelope = new Envelope(env.MinX, env.MinY, env.MaxX, env.MaxY); switch (defn.GetGeomType()) { case OSGeo_v1.OGR.wkbGeometryType.wkbPoint: _geomType = geometryType.Point; break; case OSGeo_v1.OGR.wkbGeometryType.wkbLineString: case OSGeo_v1.OGR.wkbGeometryType.wkbMultiLineString: _geomType = geometryType.Polyline; break; case OSGeo_v1.OGR.wkbGeometryType.wkbPolygon: case OSGeo_v1.OGR.wkbGeometryType.wkbMultiPolygon: _geomType = geometryType.Polygon; break; } }