C#在oracle中存取图片（web版）

CREATE TABLE SYSTEM.IMAGE ( IMAGEID NUMBER(18,0) NOT NULL, IMAGEDATA BLOB, IMAGECONTENTTYPE VARCHAR2(50), IMAGEDESCRIPTION VARCHAR2(200), IMAGESIZE NUMBER(12,0), CONSTRAINT SYS_C005291 PRIMARY KEY (IMAGEID) USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 TABLESPACE SYSTEM STORAGE(INITIAL 64K MINEXTENTS 1 MAXEXTENTS 2147483645 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) LOGGING ) PCTFREE 10 PCTUSED 40 MAXTRANS 255 TABLESPACE SYSTEM STORAGE(INITIAL 64K MINEXTENTS 1 MAXEXTENTS 2147483645 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) NOCACHE LOGGING /