Hi everyone,
I am using below codes to try convert geometry from a Dgn file to Shape
file. But, I can't exit the FeatureReading loop:
void convert()
{
OGRRegisterAll();
OGRDataSource *poDS, *poSHPDS;
const char *pszDriverName = "ESRI Shapefile";
OGRSFDriver *poDriver;
poDriver = OGRSFDriverRegistrar::GetRegistrar()->GetDriverByName(
pszDriverName );
// Open file DGN
poDS = OGRSFDriverRegistrar::Open( sourceFile, FALSE );
if( poDS == NULL )
{
cout << "Error opeing DGN file." << endl;
return false;
}
// Create datasource for file shp
poSHPDS = poDriver->CreateDataSource(destinationPath,NULL);
if( poSHPDS == NULL )
{
cout << "Error creating shape file." << endl;
return false;
}
OGRLayer *poLayer, *poSHPLayer;
// Get Layer from DGN file
poLayer = poDS->GetLayer(0);
// Create new Layer of SHP file
poSHPLayer = poSHPDS->CreateLayer (shpFileName, NULL, wkbPolygon, NULL);
if(poSHPLayer == NULL)
{
cout << "Error creating Layer of Shape File." << endl;
return false;
}
OGRFeature *poFeature;
poLayer->ResetReading();
*while( (poFeature = poLayer->GetNextFeature()) != NULL ) // Can't exit
this loop*
{
OGRGeometry *poGeometry;
poGeometry = poFeature->GetGeometryRef();
// if feature is a Polygon
if( poGeometry != NULL && (wkbFlatten(poGeometry->getGeometryType()) ==
wkbPolygon ) )
{
OGRFeature *poSHPFeature;
//Create new Feature shape file
poSHPFeature = OGRFeature::CreateFeature
(poSHPLayer->GetLayerDefn());
poSHPFeature->SetGeometry (poGeometry);
OGRPolygon *poPolygon = (OGRPolygon*)
poSHPFeature->GetGeometryRef();
poLayer->SetSpatialFilter(poGeometry);
poLayer->ResetReading ();
}
OGRFeature::DestroyFeature( poFeature );
}
OGRDataSource::DestroyDataSource( poDS );
OGRDataSource::DestroyDataSource( poSHPDS );
return true;
}
Please find my attached dgn file. Dc19.dgn
<http://osgeo-org.1560.x6.nabble.com/file/n5057267/Dc19.dgn>
Are there anyone know why and how to fix it ?
Thanks and regards,
Tai
--
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