public static Encoding TryDetectEncoding(string dbfFileName)
{
var cpgFile = Shapefile.GetCpgFileName(dbfFileName);
if (!System.IO.File.Exists(cpgFile))
{
return(null);
}
var encodingText = System.IO.File.ReadAllText(cpgFile);
if (encodingText?.ToUpper()?.Trim() == "UTF-8" || encodingText?.ToUpper()?.Trim() == "UTF8")
{
return(Encoding.UTF8);
}
else if (encodingText?.Contains("1256") == true)
{
//return Dbf.DbfFile._arabicEncoding;
return(DbfFile._arabicEncoding);
}
else
{
return(null);
}
}
public static void Write <T>(string dbfFileName,
IEnumerable <T> values,
List <ObjectToDbfTypeMap <T> > mapping,
Encoding encoding,
bool overwrite = false)
{
var columns = mapping.Select(m => m.FieldType).ToList();
int control = 0;
try
{
//if (columns.Count != mapping.Count)
//{
// throw new NotImplementedException();
//}
var mode = Shapefile.GetMode(dbfFileName, overwrite);
System.IO.Stream stream = new System.IO.FileStream(dbfFileName, mode);
System.IO.BinaryWriter writer = new System.IO.BinaryWriter(stream);
DbfHeader header = new DbfHeader(values.Count(), mapping.Count, GetRecordLength(columns), encoding);
writer.Write(IRI.Msh.Common.Helpers.StreamHelper.StructureToByteArray(header));
foreach (var item in columns)
{
writer.Write(IRI.Msh.Common.Helpers.StreamHelper.StructureToByteArray(item));
}
//Terminator
writer.Write(byte.Parse("0D", System.Globalization.NumberStyles.HexNumber));
for (int i = 0; i < values.Count(); i++)
{
control = i;
// All dbf field records begin with a deleted flag field. Deleted - 0x2A (asterisk) else 0x20 (space)
writer.Write(byte.Parse("20", System.Globalization.NumberStyles.HexNumber));
for (int j = 0; j < mapping.Count; j++)
{
// 1400.02.03-comment
//byte[] temp = new byte[columns[j].Length];
object value = mapping[j].MapFunction(values.ElementAt(i));
var temp = DbfFieldMappings.Encode(value, columns[j].Length, encoding);
// 1400.02.03-comment
//if (value is DateTime dt)
//{
// value = dt.ToString("yyyyMMdd");
//}
//if (value != null)
//{
// //encoding.GetBytes(value.ToString(), 0, value.ToString().Length, temp, 0);
// temp = GetBytes(value.ToString(), temp, encoding);
//}
////string tt = encoding.GetString(temp);
////var le = tt.Length;
writer.Write(temp);
}
}
//End of file
writer.Write(byte.Parse("1A", System.Globalization.NumberStyles.HexNumber));
writer.Close();
stream.Close();
System.IO.File.WriteAllText(Shapefile.GetCpgFileName(dbfFileName), encoding.BodyName);
}
catch (Exception ex)
{
string message = ex.Message;
string m2 = message + " " + control.ToString();
}
}
internal static void Write <T>(string fileName,
List <T> values,
List <Func <T, object> > mapping,
List <DbfFieldDescriptor> columns,
Encoding encoding,
bool overwrite = false)
{
int control = 0;
try
{
if (columns.Count != mapping.Count)
{
throw new NotImplementedException();
}
//var mode = overwrite ? System.IO.FileMode.Create : System.IO.FileMode.CreateNew;
var mode = Shapefile.GetMode(fileName, overwrite);
System.IO.Stream stream = new System.IO.FileStream(fileName, mode);
System.IO.BinaryWriter writer = new System.IO.BinaryWriter(stream);
DbfHeader header = new DbfHeader(values.Count, mapping.Count, GetRecordLength(columns), encoding);
writer.Write(IRI.Ket.Common.Helpers.StreamHelper.StructureToByteArray(header));
foreach (var item in columns)
{
writer.Write(IRI.Ket.Common.Helpers.StreamHelper.StructureToByteArray(item));
}
//Terminator
writer.Write(byte.Parse("0D", System.Globalization.NumberStyles.HexNumber));
for (int i = 0; i < values.Count; i++)
{
control = i;
// All dbf field records begin with a deleted flag field. Deleted - 0x2A (asterisk) else 0x20 (space)
writer.Write(byte.Parse("20", System.Globalization.NumberStyles.HexNumber));
for (int j = 0; j < mapping.Count; j++)
{
byte[] temp = new byte[columns[j].Length];
object value = mapping[j](values[i]);
if (value != null)
{
//encoding.GetBytes(value.ToString(), 0, value.ToString().Length, temp, 0);
temp = GetBytes(value.ToString(), temp, encoding);
}
//string tt = encoding.GetString(temp);
//var le = tt.Length;
writer.Write(temp);
}
}
//End of file
writer.Write(byte.Parse("1A", System.Globalization.NumberStyles.HexNumber));
writer.Close();
stream.Close();
System.IO.File.WriteAllText(Shapefile.GetCpgFileName(fileName), encoding.BodyName);
}
catch (Exception ex)
{
string message = ex.Message;
string m2 = message + " " + control.ToString();
}
}