public static List <DBFFieldDescriptor> GetDbfSchema(string dbfFileName, Encoding encoding)
{
Stream stream = new FileStream(dbfFileName, FileMode.Open);
BinaryReader reader = new BinaryReader(stream);
byte[] buffer = reader.ReadBytes(Marshal.SizeOf(typeof(DBFHeader)));
DBFHeader header = BinaryStream.ByteArrayToStructure <DBFHeader>(buffer);
List <DBFFieldDescriptor> columns = new List <DBFFieldDescriptor>();
if ((header.LengthOfHeader - 33) % 32 != 0)
{
throw new NotImplementedException();
}
int numberOfFields = (header.LengthOfHeader - 33) / 32;
for (int i = 0; i < numberOfFields; i++)
{
buffer = reader.ReadBytes(Marshal.SizeOf(typeof(DBFFieldDescriptor)));
columns.Add(DBFFieldDescriptor.Parse(buffer, encoding));
}
reader.Close();
stream.Close();
return(columns);
}
public static object[][] ReadToObject(string dbfFileName, string tableName)
{
Stream stream = new FileStream(dbfFileName, FileMode.Open);
BinaryReader reader = new BinaryReader(stream);
byte[] buffer = reader.ReadBytes(Marshal.SizeOf(typeof(DBFHeader)));
DBFHeader header = BinaryStream.ByteArrayToStructure <DBFHeader>(buffer);
List <DBFFieldDescriptor> columns = new List <DBFFieldDescriptor>();
if ((header.LengthOfHeader - 33) % 32 != 0)
{
throw new NotImplementedException();
}
int numberOfFields = (header.LengthOfHeader - 33) / 32;
for (int i = 0; i < numberOfFields; i++)
{
buffer = reader.ReadBytes(Marshal.SizeOf(typeof(DBFFieldDescriptor)));
columns.Add(DBFFieldDescriptor.Parse(buffer, DBFFile.fieldsEncoding));
}
//System.Data.DataTable result = MakeTableSchema(tableName, columns);
var result = new object[header.NumberOfRecords][];
((FileStream)reader.BaseStream).Seek(header.LengthOfHeader, SeekOrigin.Begin);
for (int i = 0; i < header.NumberOfRecords; i++)
{
// First we'll read the entire record into a buffer and then read each field from the buffer
// This helps account for any extra space at the end of each record and probably performs better
buffer = reader.ReadBytes(header.LengthOfEachRecord);
BinaryReader recordReader = new BinaryReader(new MemoryStream(buffer));
// All dbf field records begin with a deleted flag field. Deleted - 0x2A (asterisk) else 0x20 (space)
if (recordReader.ReadChar() == '*')
{
continue;
}
object[] values = new object[columns.Count];
for (int j = 0; j < columns.Count; j++)
{
int fieldLenth = columns[j].Length;
values[j] = MapFunction[columns[j].Type](recordReader.ReadBytes(fieldLenth));
}
recordReader.Close();
result[i] = values;
}
reader.Close();
stream.Close();
return(result);
}
