public static void Save(string shpFileName, IEnumerable <IEsriShape> shapes, bool createDbf = false, bool overwrite = false, SrsBase srs = null)
{
if (shapes.IsNullOrEmpty())
{
return;
}
var directory = System.IO.Path.GetDirectoryName(shpFileName);
if (!System.IO.Directory.Exists(directory) && !string.IsNullOrEmpty(directory))
{
System.IO.Directory.CreateDirectory(directory);
}
IEsriShapeCollection collection = new EsriShapeCollection <IEsriShape>(shapes);
EsriShapeType shapeType = shapes.First().Type;
using (System.IO.MemoryStream featureWriter = new System.IO.MemoryStream())
{
int recordNumber = 0;
foreach (IEsriShape item in shapes)
{
featureWriter.Write(ShpWriter.WriteHeaderToByte(++recordNumber, item), 0, 2 * ShapeConstants.IntegerSize);
featureWriter.Write(item.WriteContentsToByte(), 0, 2 * item.ContentLength);
}
using (System.IO.MemoryStream shpWriter = new System.IO.MemoryStream())
{
int fileLength = (int)featureWriter.Length / 2 + 50;
shpWriter.Write(ShpWriter.WriteMainHeader(collection, fileLength, shapeType), 0, 100);
shpWriter.Write(featureWriter.ToArray(), 0, (int)featureWriter.Length);
//var mode = overwrite ? System.IO.FileMode.Create : System.IO.FileMode.CreateNew;
var mode = Shapefile.GetMode(shpFileName, overwrite);
System.IO.FileStream stream = new System.IO.FileStream(shpFileName, mode);
shpWriter.WriteTo(stream);
stream.Close();
shpWriter.Close();
featureWriter.Close();
}
}
ShxWriter.Write(Shapefile.GetShxFileName(shpFileName), collection, shapeType, overwrite);
if (createDbf)
{
Dbf.DbfFile.WriteDefault(Shapefile.GetDbfFileName(shpFileName), collection.Count, overwrite);
}
//try to automatically find srs
if (srs == null)
{
var srid = shapes.First()?.Srid ?? 0;
srs = SridHelper.AsSrsBase(srid);
}
if (srs != null)
{
SaveAsPrj(shpFileName, srs, overwrite);
}
}
protected ShpReader(string fileName, EsriShapeType type, int srid)
{
this._srid = srid;
//this.directoryName = System.IO.Path.GetDirectoryName(fileName);
//this.fileNameWithoutExtension = System.IO.Path.GetFileNameWithoutExtension(fileName);
if (!Shapefile.CheckAllNeededFilesExists(fileName))
{
throw new NotImplementedException();
}
ShxReader shxFile = new ShxReader(Shapefile.GetShxFileName(fileName));
using (System.IO.FileStream shpStream = new System.IO.FileStream(fileName, System.IO.FileMode.Open))
{
using (this.shpReader = new System.IO.BinaryReader(shpStream))
{
this.MainHeader = new MainFileHeader(this.shpReader.ReadBytes(ShapeConstants.MainHeaderLengthInBytes));
if ((EsriShapeType)this.MainHeader.ShapeType != type)
{
throw new NotImplementedException();
}
if (!MainFileHeader.CanBeForTheSameShapefile(this.MainHeader, shxFile.MainHeader))
{
throw new NotImplementedException();
}
this.elements = new EsriShapeCollection <T>(this.MainHeader);
int numberOfRecords = shxFile.NumberOfRecords;
for (int i = 0; i < numberOfRecords; i++)
{
int offset, contentLength02;
shxFile.GetRecord(i, out offset, out contentLength02);
shpReader.BaseStream.Position = offset * 2;
int recordNumber, contentLength;
ReadRecordHeader(out recordNumber, out contentLength);
if (contentLength != contentLength02)
{
System.Diagnostics.Trace.WriteLine("ERROR at contentLength != contentLength02: i=" + i.ToString());
//throw new NotImplementedException();
}
if (contentLength == 2)
{
continue;
}
elements.Add(ReadElement());
//4: length of the record header in words
//contentLength: length of the contents in words
//this.tempPosition = this.tempPosition - (ShapeConstants.RecordHeaderLengthInWords + contentLength);
}
}
}
}
