public static ShapefileWriter Create(string path, ShapefileHeader header)
{
ShapefileWriter writer = new ShapefileWriter(path, header, FileMode.CreateNew, FileAccess.Write);
writer._writerShape.BaseStream.Seek(100L, SeekOrigin.Begin);
writer._writerIndex.BaseStream.Seek(100L, SeekOrigin.Begin);
writer._recordNumber = 1;
writer._filePos = 50;
return writer;
}
public static ShapefileWriter Create(string path, ShapefileHeader header)
{
ShapefileWriter writer = new ShapefileWriter(path, header, FileMode.CreateNew, FileAccess.Write);
writer._writerShape.BaseStream.Seek(100L, SeekOrigin.Begin);
writer._writerIndex.BaseStream.Seek(100L, SeekOrigin.Begin);
writer._recordNumber = 1;
writer._filePos = 50;
return(writer);
}
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;
}
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);
}
