/// <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(); }