//Конструктор
public DBFField(DBFFieldDescriptor descr, DBFRecord pr)
{
_parent = pr;
_descriptor = descr;
_value = new byte[_descriptor.bFieldSize + _descriptor.bFractionalSize];
for (ushort x = 0; x < _value.Length; x++)
{
_value[x] = 0;
}
}
//Загрузка таблицы из файла
public bool LoadFrom(string tablePath)
{
ushort i;
uint j;
if (!File.Exists(tablePath))
{
_bLastError = ErrCantOpenTable;
return(false);
}
Header = new DBFHeader(this);
Index = new DBFIndex(this);
var f = new FileStream(tablePath, FileMode.Open, FileAccess.Read);
var r = new BinaryReader(f);
Header.bFlags = r.ReadByte();
Header.bYear = r.ReadByte();
Header.bMonth = r.ReadByte();
Header.bDay = r.ReadByte();
Header.dwRecordsCount = r.ReadUInt32();
Header.wHeaderSize = r.ReadUInt16();
Header.wRecordSize = r.ReadUInt16();
Header.wReserved = r.ReadUInt16();
Header.bTransactionFlags = r.ReadByte();
Header.bEncryption = r.ReadByte();
Header.baUseUserEnvironment = r.ReadBytes(12);
Header.bUseIndex = r.ReadByte();
Header.bCodePage = r.ReadByte();
Header.wReserved2 = r.ReadUInt16();
var wFieldsCount = (ushort)(((short)Header.wHeaderSize - 32 - 1) / 32);
Header.Field = new DBFFieldDescriptor[wFieldsCount];
for (i = 0; i < wFieldsCount; i++)
{
Header.Field[i] = new DBFFieldDescriptor(Header, i)
{
strName = r.ReadBytes(11),
bFieldType = r.ReadByte(),
dwAddress = r.ReadUInt32(),
bFieldSize = r.ReadByte(),
bFractionalSize = r.ReadByte(),
wReserved = r.ReadUInt16(),
bWorkAreaID = r.ReadByte(),
wMutiUser = r.ReadUInt16(),
bSetFields = r.ReadByte(),
baReserved = r.ReadBytes(7),
bMDXIDIncluded = r.ReadByte()
};
}
byte c = r.ReadByte();
if (c != 13)
{
r.Close();
f.Close();
_bLastError = ErrWrongFileFormat;
return(false);
}
Record = new DBFRecord[Header.dwRecordsCount];
for (j = 0; j < Header.dwRecordsCount; j++)
{
Record[j] = new DBFRecord(this, wFieldsCount);
if (r.ReadByte() != 0x20)
{
Record[j].Delete();
}
else
{
Record[j].Restore();
}
Record[j].Field = new DBFField[wFieldsCount];
for (i = 0; i < wFieldsCount; i++)
{
Record[j].Field[i] = new DBFField(Header.Field[i], Record[j])
{
Value = r.ReadBytes(Header.Field[i].bFieldSize)
};
}
}
r.Close();
f.Close();
//r = null;
//f = null;
switch (Header.bCodePage)
{
case 0x01: Options.dwCodePage = 437; break;
case 0x02: Options.dwCodePage = 850; break;
case 0x65: Options.dwCodePage = 866; break;
case 0x26: Options.dwCodePage = 866; break;
case 0xC8: Options.dwCodePage = 1250; break;
default: Options.dwCodePage = 1251; break;
}
_bLastError = ErrNoErrors;
return(true);
}
//Загрузка таблицы из файла
public bool LoadFrom(string tablePath)
{
ushort i;
uint j;
if( !File.Exists(tablePath) )
{
_bLastError = ErrCantOpenTable;
return false;
}
Header = new DBFHeader(this);
Index = new DBFIndex(this);
var f = new FileStream(tablePath, FileMode.Open, FileAccess.Read);
var r = new BinaryReader(f);
Header.bFlags = r.ReadByte();
Header.bYear = r.ReadByte();
Header.bMonth = r.ReadByte();
Header.bDay = r.ReadByte();
Header.dwRecordsCount = r.ReadUInt32();
Header.wHeaderSize = r.ReadUInt16();
Header.wRecordSize = r.ReadUInt16();
Header.wReserved = r.ReadUInt16();
Header.bTransactionFlags = r.ReadByte();
Header.bEncryption = r.ReadByte();
Header.baUseUserEnvironment = r.ReadBytes(12);
Header.bUseIndex = r.ReadByte();
Header.bCodePage = r.ReadByte();
Header.wReserved2 = r.ReadUInt16();
var wFieldsCount = (ushort)(((short)Header.wHeaderSize - 32 - 1)/32);
Header.Field = new DBFFieldDescriptor[wFieldsCount];
for (i = 0; i < wFieldsCount; i++)
{
Header.Field[i] = new DBFFieldDescriptor(Header, i)
{
strName = r.ReadBytes(11),
bFieldType = r.ReadByte(),
dwAddress = r.ReadUInt32(),
bFieldSize = r.ReadByte(),
bFractionalSize = r.ReadByte(),
wReserved = r.ReadUInt16(),
bWorkAreaID = r.ReadByte(),
wMutiUser = r.ReadUInt16(),
bSetFields = r.ReadByte(),
baReserved = r.ReadBytes(7),
bMDXIDIncluded = r.ReadByte()
};
}
byte c = r.ReadByte();
if (c != 13)
{
r.Close();
f.Close();
_bLastError = ErrWrongFileFormat;
return false;
}
Record = new DBFRecord[Header.dwRecordsCount];
for (j = 0; j < Header.dwRecordsCount; j++)
{
Record[j] = new DBFRecord(this, wFieldsCount);
if( r.ReadByte() != 0x20 ) Record[j].Delete();
else Record[j].Restore();
Record[j].Field = new DBFField[wFieldsCount];
for (i = 0; i < wFieldsCount; i++)
{
Record[j].Field[i] = new DBFField(Header.Field[i], Record[j])
{Value = r.ReadBytes(Header.Field[i].bFieldSize)};
}
}
r.Close();
f.Close();
//r = null;
//f = null;
switch( Header.bCodePage )
{
case 0x01: Options.dwCodePage = 437; break;
case 0x02: Options.dwCodePage = 850; break;
case 0x65: Options.dwCodePage = 866; break;
case 0x26: Options.dwCodePage = 866; break;
case 0xC8: Options.dwCodePage = 1250; break;
default: Options.dwCodePage = 1251; break;
}
_bLastError = ErrNoErrors;
return true;
}
//Конструктор
public DBFField( DBFFieldDescriptor descr, DBFRecord pr )
{
_parent = pr;
_descriptor = descr;
_value = new byte[_descriptor.bFieldSize + _descriptor.bFractionalSize];
for( ushort x = 0; x < _value.Length; x++ ) _value[x] = 0;
}