//将图片存入数据库的函数
( A+ ^" Q. K( |" A" aprocedure TDBOper.PhotoToDB(const image:TSUIImagePanel;const Source:TCustomADODataset);
8 |8 X2 O5 _9 k) m9 P2 b//image这里输入放图片的控件,比如TImage,Source是要存入的数据库名,最后一个是窗体名 const tempFile='temp.jpg';" L, |8 t2 I3 v, r2 b. i7 P const photo='照片实体'; const photosize='照片文件长度'; var f:file of Byte;! X8 h/ J5 d, p! S+ g begin: h( W) F- j5 I q if Source.RecordCount<>0 then/ j0 I7 z$ E* T. N2 Q* W4 S begin Source.First; Source.Edit;' a G! H3 c$ r: x image.Picture.SaveToFile(tempFile);* _' Y( F9 P2 `2 J1 r- h try' R/ I9 R6 v7 b% B! { (TBlobField(Source.FieldByName(photo))).LoadFromFile(tempFile); AssignFile(f,tempFile); Reset(f);# _. G4 q- r! Y) d$ g/ P Source.FieldValues[photosize]:=FileSize(f);# K& Z. K3 n/ l Source.Post;# Y& g& N; M* K9 ^0 O( ~1 N finally CloseFile(f);! y0 B4 i' m! h8 u* J" B DeleteFile(tempFile);% \ A# V* T8 G1 [+ y end; c" s' i* r$ p! j# y5 M end; end;0 u9 z8 {! |5 }: N //------------------------------------------------------------------从数据库中读出图片的函数8 f' I" B, d5 p function TDBOper.DBToPhoto(const Source:TCustomADODataset;const image:TSUIImagePanel):Integer;
4 i9 _' K% z+ l6 w//image这里输入放图片的控件,比如TImage,Source是要存入的数据库名( u6 z* h7 }! j5 C/ B, v( F5 k9 Z const tempFile='temp.jpg';9 q$ r. b; {- U const photo='照片实体'; const photosize='照片文件长度'; begin+ Z- C4 @6 U: ~& X4 j1 S result:=0; if Source.RecordCount<>0 then begin" G; |" C$ w* y7 |' N0 ~+ I //Source.First; (TBlobField(Source.FieldByName(photo))).SaveToFile(tempFile); try image.Picture.LoadFromFile(tempFile);; Q% @6 J* d! j9 X result:=Source.FieldByName(photosize).AsInteger; finally- M0 l* p8 Q5 k) @ W DeleteFile(tempFile); end;# P+ Z8 a& N5 z/ a0 n0 u end else2 k7 z {' t, |( E, M S" n result:=0;# U; ~ p% b( y end;
| 欢迎光临 数学建模社区-数学中国 (http://www.madio.net/) | Powered by Discuz! X2.5 |