public static object GetFieldValue(this OSGeo.OGR.Feature feature, string fieldName)
{
if (feature == null || string.IsNullOrEmpty(fieldName))
{
throw new Exception("参数设置错误");
}
using var fieldDefn = feature.GetFieldDefnRef(fieldName);
object value;
switch (fieldDefn.GetFieldType())
{
case OSGeo.OGR.FieldType.OFTString:
value = feature.GetFieldAsString(fieldName);
break;
case OSGeo.OGR.FieldType.OFTInteger:
value = feature.GetFieldAsInteger(fieldName);
break;
case OSGeo.OGR.FieldType.OFTInteger64:
value = feature.GetFieldAsInteger64(fieldName);
break;
case OSGeo.OGR.FieldType.OFTReal:
value = feature.GetFieldAsDouble(fieldName);
break;
default:
throw new NotImplementedException();
}
return(value);
}
public static object GetFieldValue(this OSGeo.OGR.Feature feature, int index)
{
if (feature == null || index < 0 || index >= feature.GetFieldCount())
{
throw new Exception("参数设置错误");
}
using var fieldDefn = feature.GetFieldDefnRef(index);
object value;
switch (fieldDefn.GetFieldType())
{
case OSGeo.OGR.FieldType.OFTString:
value = feature.GetFieldAsString(index);
break;
case OSGeo.OGR.FieldType.OFTInteger:
value = feature.GetFieldAsInteger(index);
break;
case OSGeo.OGR.FieldType.OFTInteger64:
value = feature.GetFieldAsInteger64(index);
break;
case OSGeo.OGR.FieldType.OFTReal:
value = feature.GetFieldAsDouble(index);
break;
default:
throw new NotImplementedException();
}
return(value);
}
//private static Geometry ParseOgrGeometry(OgrGeometry ogrGeometry, WKBReader reader)
////private static Geometry ParseOgrGeometry(OgrGeometry ogrGeometry, IGeometryFactory factory)
//{
// if (ogrGeometry != null)
// {
// //Just in case it isn't 2D
// ogrGeometry.FlattenTo2D();
// var wkbBuffer = new byte[ogrGeometry.WkbSize()];
// ogrGeometry.ExportToWkb(wkbBuffer);
// //var geom = GeometryFromWKB.Parse(wkbBuffer, factory);
// var geom = reader.Read(wkbBuffer);
// if (geom == null)
// _log.Debug(t=> t("Failed to parse '{0}'", ogrGeometry.GetGeometryType()));
// return geom;
// ogrGeometry.GetGeometry()
// }
// return null;
//}
//private static FeatureDataRow LoadOgrFeatureToFeatureDataRow(FeatureDataTable table, OSGeo.OGR.Feature ogrFeature, GeoAPI.Geometries.IGeometryFactory factory)
private static FeatureDataRow LoadOgrFeatureToFeatureDataRow(FeatureDataTable table, OSGeo.OGR.Feature ogrFeature, OgrGeometryReader reader)
{
var values = new object[ogrFeature.GetFieldCount()];
for (var iField = 0; iField < ogrFeature.GetFieldCount(); iField++)
{
// No need to get field value if there's no value available...
if (!ogrFeature.IsFieldSet(iField))
{
continue;
}
int count;
switch (ogrFeature.GetFieldType(iField))
{
case OgrFieldType.OFTString:
case OgrFieldType.OFTWideString:
values[iField] = ogrFeature.GetFieldAsString(iField);
break;
case OgrFieldType.OFTStringList:
case OgrFieldType.OFTWideStringList:
values[iField] = ogrFeature.GetFieldAsStringList(iField);
break;
case OgrFieldType.OFTInteger:
values[iField] = ogrFeature.GetFieldAsInteger(iField);
break;
case OgrFieldType.OFTInteger64:
values[iField] = ogrFeature.GetFieldAsInteger64(iField);
break;
case OgrFieldType.OFTIntegerList:
values[iField] = ogrFeature.GetFieldAsIntegerList(iField, out count);
break;
case OgrFieldType.OFTInteger64List:
values[iField] = null; // ogrFeature.GetFieldAsInteger64List(iField, out count);
break;
case OgrFieldType.OFTReal:
values[iField] = ogrFeature.GetFieldAsDouble(iField);
break;
case OgrFieldType.OFTRealList:
values[iField] = ogrFeature.GetFieldAsDoubleList(iField, out count);
break;
case OgrFieldType.OFTDate:
case OgrFieldType.OFTDateTime:
case OgrFieldType.OFTTime:
int y, m, d, h, mi, tz;
float s;
ogrFeature.GetFieldAsDateTime(iField, out y, out m, out d, out h, out mi, out s, out tz);
try
{
if (y == 0 && m == 0 && d == 0)
{
values[iField] = DateTime.MinValue.AddMinutes(h * 60 + mi);
}
else
{
values[iField] = new DateTime(y, m, d, h, mi, (int)s);
}
}
// ReSharper disable once EmptyGeneralCatchClause
catch { }
break;
default:
var iTmpField = iField;
_log.Debug(t => t("Cannot handle Ogr DataType '{0}'", ogrFeature.GetFieldType(iTmpField)));
break;
}
}
var fdr = (FeatureDataRow)table.LoadDataRow(values, true);
using (var gr = ogrFeature.GetGeometryRef())
{
//fdr.Geometry = ParseOgrGeometry(gr, factory);
fdr.Geometry = reader.Read(gr);
}
return(fdr);
}
