RddFieldInfo 构造函数 (String, DbFieldType, Int32, Int32, Int32, DBFFieldFlags)

 CONSTRUCTOR(
	sName AS STRING,
	nType AS DbFieldType,
	nLength AS LONG,
	nDecimals AS LONG,
	nOffSet AS LONG := -1,
	nFlags AS DBFFieldFlags := DBFFieldFlags.None
)

public RddFieldInfo(
	string sName,
	DbFieldType nType,
	int nLength,
	int nDecimals,
	int nOffSet = -1,
	DBFFieldFlags nFlags = DBFFieldFlags.None
)