/// <summary>
/// Writes a record to the file.
/// </summary>
/// <param name="record">A record to write.</param>
/// <param name="offset">Offset to start from.</param>
private void WriteRecord(FileCabinetRecord record, int offset)
{
this.fileStream.Seek(offset, SeekOrigin.Begin);
this.fileStream.Write(new byte[2], 0, sizeof(short));
this.fileStream.Write(BitConverter.GetBytes(record.Id), 0, sizeof(int));
this.fileStream.Write(WorkWithBytesHelper.MakeStringOffset(record.FirstName, StringSize), 0, StringSize);
this.fileStream.Write(WorkWithBytesHelper.MakeStringOffset(record.LastName, StringSize), 0, StringSize);
this.fileStream.Write(BitConverter.GetBytes(record.DateOfBirth.Year), 0, sizeof(int));
this.fileStream.Write(BitConverter.GetBytes(record.DateOfBirth.Month), 0, sizeof(int));
this.fileStream.Write(BitConverter.GetBytes(record.DateOfBirth.Day), 0, sizeof(int));
this.fileStream.Write(BitConverter.GetBytes(record.FavouriteNumber), 0, sizeof(short));
this.fileStream.Write(BitConverter.GetBytes(record.FavouriteCharacter), 0, sizeof(char));
this.fileStream.Write(WorkWithBytesHelper.MakeStringOffset(record.FavouriteGame, StringSize), 0, StringSize);
this.fileStream.Write(WorkWithBytesHelper.DecimalToBytes(record.Donations), 0, sizeof(decimal));
}
/// <summary>
/// Reads the record from the file.
/// </summary>
/// <param name="offset">Offset to read from.</param>
/// <returns>Record read.</returns>
public FileCabinetRecord ReadRecord(int offset)
{
this.fileStream.Seek(offset, SeekOrigin.Begin);
byte[] reservedBytes = new byte[2];
this.fileStream.Read(reservedBytes, 0, 2);
byte[] bytes = new byte[sizeof(int)];
this.fileStream.Read(bytes, 0, sizeof(int));
int id = BitConverter.ToInt32(bytes);
bytes = new byte[StringSize];
this.fileStream.Read(bytes, 0, StringSize);
string firstName = WorkWithBytesHelper.RemoveOffset(Encoding.ASCII.GetString(bytes));
this.fileStream.Read(bytes, 0, StringSize);
string lastName = WorkWithBytesHelper.RemoveOffset(Encoding.ASCII.GetString(bytes));
bytes = new byte[sizeof(int)];
this.fileStream.Read(bytes, 0, sizeof(int));
int year = BitConverter.ToInt32(bytes);
this.fileStream.Read(bytes, 0, sizeof(int));
int month = BitConverter.ToInt32(bytes);
this.fileStream.Read(bytes, 0, sizeof(int));
int day = BitConverter.ToInt32(bytes);
bytes = new byte[sizeof(short)];
this.fileStream.Read(bytes, 0, sizeof(short));
short favNumber = BitConverter.ToInt16(bytes);
bytes = new byte[sizeof(char)];
this.fileStream.Read(bytes, 0, sizeof(char));
char favCharacter = BitConverter.ToChar(bytes);
bytes = new byte[StringSize];
this.fileStream.Read(bytes, 0, StringSize);
string favGame = WorkWithBytesHelper.RemoveOffset(Encoding.ASCII.GetString(bytes));
bytes = new byte[sizeof(decimal)];
this.fileStream.Read(bytes, 0, sizeof(decimal));
decimal donations = WorkWithBytesHelper.BytesToDecimal(bytes);
return(new FileCabinetRecord(id, firstName, lastName, new DateTime(year, month, day), favNumber, favCharacter, favGame, donations));
}