/// <summary>
/// This will return the correct shapefile type by reading the filename.
/// </summary>
/// <param name="filename">A string specifying the file with the extension .shp to open.</param>
/// <param name="progressHandler">recieves progress messages and overrides the ProgressHandler on the DataManager.DefaultDataManager</param>
/// <returns>A correct shapefile object which is exclusively for reading the .shp data</returns>
public new static Shapefile OpenFile(string filename, IProgressHandler progressHandler)
{
ShapefileHeader head = new ShapefileHeader();
head.Open(filename);
PointShapefile psf;
LineShapefile lsf;
PolygonShapefile pgsf;
MultiPointShapefile mpsf;
switch (head.ShapeType)
{
case ShapeTypes.MultiPatch:
throw new NotImplementedException("This shape type is not yet supported.");
// break;
case ShapeTypes.MultiPoint:
mpsf = new MultiPointShapefile();
mpsf.Open(filename, progressHandler);
return mpsf;
case ShapeTypes.MultiPointM:
mpsf = new MultiPointShapefile();
mpsf.Open(filename, progressHandler);
return mpsf;
case ShapeTypes.MultiPointZ:
mpsf = new MultiPointShapefile();
mpsf.Open(filename, progressHandler);
return mpsf;
case ShapeTypes.NullShape:
throw new NotImplementedException("This shape type is not yet supported.");
// break;
case ShapeTypes.Point:
// Instantiate a new object to handle the point shapefile
psf = new PointShapefile();
// Open the geometric components of the data (but not the dbf components)
psf.Open(filename, progressHandler);
return psf;
case ShapeTypes.PointM:
// Instantiate a new object to handle the point shapefile
psf = new PointShapefile();
// Open the geometric components of the data (but not the dbf components)
psf.Open(filename, progressHandler);
return psf;
case ShapeTypes.PointZ:
// Instantiate a new object to handle the point shapefile
psf = new PointShapefile();
// Open the geometric components of the data (but not the dbf components)
psf.Open(filename, progressHandler);
return psf;
case ShapeTypes.Polygon:
pgsf = new PolygonShapefile();
pgsf.Open(filename, progressHandler);
return pgsf;
case ShapeTypes.PolygonM:
pgsf = new PolygonShapefile();
pgsf.Open(filename, progressHandler);
return pgsf;
case ShapeTypes.PolygonZ:
pgsf = new PolygonShapefile();
pgsf.Open(filename, progressHandler);
return pgsf;
case ShapeTypes.PolyLine:
lsf = new LineShapefile();
lsf.Open(filename, progressHandler);
return lsf;
case ShapeTypes.PolyLineM:
lsf = new LineShapefile();
lsf.Open(filename, progressHandler);
return lsf;
case ShapeTypes.PolyLineZ:
lsf = new LineShapefile();
lsf.Open(filename, progressHandler);
return lsf;
}
return null;
}
