/// <summary>
/// Initializes a new instance of the ShapefileHeader class with values read in from the stream.
/// </summary>
/// <remarks>Reads the header information from the stream.</remarks>
/// <param name="shpBinaryReader">BigEndianBinaryReader stream to the shapefile.</param>
public ShapefileHeader(BigEndianBinaryReader shpBinaryReader)
{
if (shpBinaryReader == null)
throw new ArgumentNullException("shpBinaryReader");
_fileCode = shpBinaryReader.ReadInt32BE();
if (_fileCode != Shapefile.ShapefileId)
throw new ShapefileException("The first four bytes of this file indicate this is not a shape file.");
// skip 5 unsed bytes
shpBinaryReader.ReadInt32BE();
shpBinaryReader.ReadInt32BE();
shpBinaryReader.ReadInt32BE();
shpBinaryReader.ReadInt32BE();
shpBinaryReader.ReadInt32BE();
_fileLength = shpBinaryReader.ReadInt32BE();
_version = shpBinaryReader.ReadInt32();
Debug.Assert(_version == 1000, "Shapefile version", String.Format("Expecting only one version (1000), but got {0}",_version));
int shapeType = shpBinaryReader.ReadInt32();
_shapeType = (ShapeGeometryType) EnumUtility.Parse(typeof(ShapeGeometryType), shapeType.ToString());
//read in and store the bounding box
double[] coords = new double[4];
for (int i = 0; i < 4; i++)
coords[i] = shpBinaryReader.ReadDouble();
_bounds = new Envelope(coords[0], coords[2], coords[1], coords[3]);
// skip z and m bounding boxes.
for (int i = 0; i < 4; i++)
shpBinaryReader.ReadDouble();
}
/// <summary>
/// Initializes a new instance of the Shapefile class with the given parameters.
/// </summary>
/// <param name="filename">The filename of the shape file to read (with .shp).</param>
/// <param name="geometryFactory">The GeometryFactory to use when creating Geometry objects.</param>
public ShapefileReader(string filename, IGeometryFactory geometryFactory)
{
Guard.IsNotNull(filename, "filename");
Guard.IsNotNull(geometryFactory, "geometryFactory");
_filename = filename;
_geometryFactory = geometryFactory;
using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
{
// read header information. note, we open the file, read the header information and then
// close the file. This means the file is not opened again until GetEnumerator() is requested.
// For each call to GetEnumerator() a new BinaryReader is created.
using (
var stream = new IsolatedStorageFileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read,
isf))
{
using (var shpBinaryReader = new BigEndianBinaryReader(stream))
{
_mainHeader = new ShapefileHeader(shpBinaryReader);
shpBinaryReader.Close();
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapefileEnumerator"/> class.
/// </summary>
/// <param name="shapefile"></param>
public ShapefileEnumerator(ShapefileReader shapefile)
{
_parent = shapefile;
// create a file stream for each enumerator that is given out. This allows the same file
// to have one or more enumerator. If we used the parents stream - than only one IEnumerator
// could be given out.
var stream = new FileStream(_parent._filename, FileMode.Open, FileAccess.Read, FileShare.Read);
_shpBinaryReader = new BigEndianBinaryReader(stream);
// skip header - since parent has already read this.
_shpBinaryReader.ReadBytes(100);
ShapeGeometryType type = _parent._mainHeader.ShapeType;
_handler = Shapefile.GetShapeHandler(type);
if (_handler == null)
throw new NotSupportedException("Unsuported shape type:" + type);
}
/// <summary>
/// Initializes a new instance of the Shapefile class with the given parameters.
/// </summary>
/// <param name="filename">The filename of the shape file to read (with .shp).</param>
/// <param name="geometryFactory">The GeometryFactory to use when creating Geometry objects.</param>
public ShapefileReader(string filename, IGeometryFactory geometryFactory)
{
if (filename == null)
throw new ArgumentNullException("filename");
if (geometryFactory == null)
throw new ArgumentNullException("geometryFactory");
_filename = filename;
_geometryFactory = geometryFactory;
// read header information. note, we open the file, read the header information and then
// close the file. This means the file is not opened again until GetEnumerator() is requested.
// For each call to GetEnumerator() a new BinaryReader is created.
var stream = IoManager.File.CreateFileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
var shpBinaryReader = new BigEndianBinaryReader(stream);
_mainHeader = new ShapefileHeader(shpBinaryReader);
shpBinaryReader.Close();
}
public ShapefileReader(IStreamProviderRegistry shapeStreamProviderRegistry, IGeometryFactory geometryFactory)
{
if (shapeStreamProviderRegistry == null)
throw new ArgumentNullException("shapeStreamProviderRegistry");
if (geometryFactory == null)
throw new ArgumentNullException("geometryFactory");
_shapeStreamProviderRegistry = shapeStreamProviderRegistry;
_geometryFactory = geometryFactory;
// read header information. note, we open the file, read the header information and then
// close the file. This means the file is not opened again until GetEnumerator() is requested.
// For each call to GetEnumerator() a new BinaryReader is created.
using (var stream = shapeStreamProviderRegistry[StreamTypes.Shape].OpenRead())
{
using (var shpBinaryReader = new BigEndianBinaryReader(stream))
{
_mainHeader = new ShapefileHeader(shpBinaryReader);
}
}
}
/// <summary>
/// Initializes a new instance of the Shapefile class with the given parameters.
/// </summary>
/// <param name="filename">The filename of the shape file to read (with .shp).</param>
/// <param name="geometryFactory">The GeometryFactory to use when creating Geometry objects.</param>
public ShapefileReader(string filename, IGeometryFactory geometryFactory)
{
if (filename == null)
{
throw new ArgumentNullException("filename");
}
if (geometryFactory == null)
{
throw new ArgumentNullException("geometryFactory");
}
_filename = filename;
_geometryFactory = geometryFactory;
// read header information. note, we open the file, read the header information and then
// close the file. This means the file is not opened again until GetEnumerator() is requested.
// For each call to GetEnumerator() a new BinaryReader is created.
var stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
var shpBinaryReader = new BigEndianBinaryReader(stream);
_mainHeader = new ShapefileHeader(shpBinaryReader);
shpBinaryReader.Close();
}
