public SHPFile(string filename)
{
try
{
FileInfo fi = new FileInfo(filename);
if (!fi.Exists)
{
return;
}
_file_SHP = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".shp";
_file_SHX = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".shx";
_file_SBX = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".sbx";
_file_IDX = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".idx";
_file_DBF = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".dbf";
_file_PRJ = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".prj";
fi = new FileInfo(_file_SHP);
if (!fi.Exists)
{
return;
}
fi = new FileInfo(_file_SHX);
if (!fi.Exists)
{
return;
}
_entities = (fi.Length - 100) / 8;
_title = fi.Name.Substring(0, fi.Name.Length - 4);
this.Open();
ReadHeader();
fi = new FileInfo(_file_DBF);
if (fi.Exists)
{
_dbfFile = new DBFFile(_file_DBF);
}
}
catch
{
Close();
}
}
public DBFDataReader(DBFFile file, string fieldnames)
{
if (file == null)
{
return;
}
_file = file;
_sr = new StreamReader(_file.Filename);
_br = new BinaryReader(_sr.BaseStream);
string[] names = null;
fieldnames = fieldnames.Replace(" ", "");
if (fieldnames != "*")
{
names = fieldnames.Split(',');
}
_tab = _file.DataTable(names);
}
public SHPFile(SHPFile file)
{
try
{
_file_SHP = file._file_SHP;
_file_SHX = file._file_SHX;
_file_IDX = file._file_IDX;
_file_DBF = file._file_DBF;
FileInfo fi = new FileInfo(_file_SHP);
if (!fi.Exists)
{
return;
}
fi = new FileInfo(_file_SHX);
if (!fi.Exists)
{
return;
}
_entities = (fi.Length - 100) / 8;
_title = fi.Name.Substring(0, fi.Name.Length - 4);
this.Open();
ReadHeader();
fi = new FileInfo(_file_DBF);
if (fi.Exists)
{
_dbfFile = new DBFFile(_file_DBF);
}
}
catch
{
Close();
}
}
public static bool Create(string filename, IGeometryDef geomDef, Fields fields)
{
if (geomDef == null || fields == null)
{
return(false);
}
try
{
FileInfo fi = new FileInfo(filename);
string file_SHP = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".shp";
string file_SHX = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".shx";
string file_DBF = fi.FullName.Substring(0, fi.FullName.Length - fi.Extension.Length) + ".dbf";
FileInfo fi_SHP = new FileInfo(file_SHP);
FileInfo fi_SHX = new FileInfo(file_SHX);
FileInfo fi_DBF = new FileInfo(file_DBF);
if (fi_SHP.Exists)
{
fi_SHP.Delete();
}
if (fi_SHX.Exists)
{
fi_SHX.Delete();
}
if (fi_DBF.Exists)
{
fi_DBF.Delete();
}
#region DBF
if (!DBFFile.Create(file_DBF, fields))
{
return(false);
}
#endregion
#region SHP
ShapeType type = ShapeType.NullShape;
switch (geomDef.GeometryType)
{
case geometryType.Point:
type = ShapeType.Point;
if (geomDef.HasZ)
{
type = ShapeType.PointZ;
}
break;
case geometryType.Multipoint:
type = ShapeType.MultiPoint;
if (geomDef.HasZ)
{
type = ShapeType.MultiPointZ;
}
break;
case geometryType.Polyline:
type = ShapeType.PolyLine;
if (geomDef.HasZ)
{
type = ShapeType.PolyLineZ;
}
break;
case geometryType.Polygon:
type = ShapeType.Polygon;
if (geomDef.HasZ)
{
type = ShapeType.PolygonZ;
}
break;
}
StreamWriter sw = new StreamWriter(file_SHP);
BinaryWriter bw = new BinaryWriter(sw.BaseStream);
bw.Write((int)SwapWord((uint)9994)); // FileCode
bw.Write((int)0); // Unused1;
bw.Write((int)0); // Unused2;
bw.Write((int)0); // Unused3;
bw.Write((int)0); // Unused4;
bw.Write((int)0); // Unused5;
bw.Write((int)SwapWord((uint)50)); // FileLength;
bw.Write((int)1000); // Version
bw.Write((int)type); // ShapeType
bw.Write((double)0.0); // Xmin
bw.Write((double)0.0); // Ymin
bw.Write((double)0.0); // Xmax
bw.Write((double)0.0); // Ymax
bw.Write((double)0.0); // Zmin
bw.Write((double)0.0); // Zmax
bw.Write((double)0.0); // Mmin
bw.Write((double)0.0); // Mmax
bw.Flush();
sw.Flush();
sw.Close();
#endregion
#region SHX
sw = new StreamWriter(file_SHX);
bw = new BinaryWriter(sw.BaseStream);
bw.Write((int)SwapWord((uint)9994)); // FileCode
bw.Write((int)0); // Unused1;
bw.Write((int)0); // Unused2;
bw.Write((int)0); // Unused3;
bw.Write((int)0); // Unused4;
bw.Write((int)0); // Unused5;
bw.Write((int)SwapWord((uint)50)); // FileLength;
bw.Write((int)1000); // Version
bw.Write((int)type); // ShapeType
bw.Write((double)0.0); // Xmin
bw.Write((double)0.0); // Ymin
bw.Write((double)0.0); // Xmax
bw.Write((double)0.0); // Ymax
bw.Write((double)0.0); // Zmin
bw.Write((double)0.0); // Zmax
bw.Write((double)0.0); // Mmin
bw.Write((double)0.0); // Mmax
bw.Flush();
sw.Flush();
sw.Close();
#endregion
return(true);
}
catch
{
return(false);
}
}