procedure Close; //关闭一个数据集,数据集必须关闭当与其关联的数据源的属性改变时。 procedure Open; // 打开记录集 procedure First; // Moves to the first record in the dataset. procedure Next; //Moves to the next record in the dataset. function FieldByName(const FieldName: string): TField;//Finds a field based on its name.