public ShapefileIndexReader(string path)
{
_path = path;
_reader = new BinaryReader(new FileStream(path, FileMode.Open, FileAccess.Read));
Header = ShapefileHeader.Read(_reader);
}
public new static ShapefileDataWriter Open(string path)
{
ShapefileHeader header;
int recordNumber;
using (BinaryReader reader = new BinaryReader(new FileStream(Path.ChangeExtension(path, ".shx"), FileMode.Open)))
{
header = ShapefileHeader.Read(reader);
recordNumber = ((int)(reader.BaseStream.Length - 100) / 8) + 1;
}
ShapefileDataWriter writer = new ShapefileDataWriter(path, header, FileMode.Append, FileAccess.Write);
writer._writerShape.BaseStream.Seek(0, SeekOrigin.End);
writer._writerIndex.BaseStream.Seek(0, SeekOrigin.End);
writer._recordNumber = recordNumber;
writer._filePos = (int)writer._writerShape.BaseStream.Length / 2;
// Need to push dbf reader to end of file.
writer._dbf = DbfFile.Open(Path.ChangeExtension(path, ".dbf"));
writer._currentRecord = new DbfRecord(writer._dbf.Header);
return(writer);
}
public ShapefileReader(string path, IGeometryFactory geometryFactory = null, GeometryTransform transform = null)
{
_gf = geometryFactory ?? new GeometryFactory();
_reader = new BinaryReader(new FileStream(path, FileMode.Open, FileAccess.Read));
ShapeHeader = ShapefileHeader.Read(_reader);
ShapeEnvelope = new Envelope();
switch (ShapeHeader.ShapeType)
{
case ShapefileGeometryType.Point:
case ShapefileGeometryType.PointZ:
_shapeFunc = ReadPoint;
break;
case ShapefileGeometryType.PolyLine:
case ShapefileGeometryType.PolyLineZ:
_shapeFunc = ReadPolyLine;
break;
case ShapefileGeometryType.Polygon:
case ShapefileGeometryType.PolygonZ:
_shapeFunc = ReadPolygon;
break;
case ShapefileGeometryType.MultiPoint:
case ShapefileGeometryType.MultiPointZ:
_shapeFunc = ReadMultiPoint;
break;
default:
throw new Exception("Shape type is not supported");
}
if (transform != null)
{
_transform = transform;
Func <IGeometry> origFun = _shapeFunc;
_shapeFunc = () =>
{
return(_transform.Apply(origFun()));
};
}
}
public static ShapefileWriter Open(string path)
{
ShapefileHeader header;
int recordNumber;
using (BinaryReader reader = new BinaryReader(new FileStream(Path.ChangeExtension(path, ".shx"), FileMode.Open)))
{
header = ShapefileHeader.Read(reader);
recordNumber = ((int)(reader.BaseStream.Length - 100) / 8) + 1;
}
ShapefileWriter writer = new ShapefileWriter(path, header, FileMode.Append, FileAccess.Write);
writer._writerShape.BaseStream.Seek(0, SeekOrigin.End);
writer._writerIndex.BaseStream.Seek(0, SeekOrigin.End);
writer._recordNumber = recordNumber;
writer._filePos = (int)writer._writerShape.BaseStream.Length / 2;
return(writer);
}