/// <summary>
/// 이진 데이타를 읽어서 버퍼에 저장한다.
/// </summary>
/// <param name="reader">IDataReader 인스턴스</param>
/// <param name="columnName">Column name</param>
/// <param name="fieldOffset">offset of column data</param>
/// <param name="buffer">buffer to store data.</param>
/// <param name="bufferoffset">buffer offset</param>
/// <param name="length">length to retrieve</param>
/// <returns>length to be retrieved</returns>
public static long AsChars(this IDataReader reader, string columnName, long fieldOffset, char[] buffer, int bufferoffset,
int length)
{
return(reader.AsChars(reader.GetOrdinal(columnName), fieldOffset, buffer, bufferoffset, length));
}
