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//将图片存入数据库的函数
4 a- z1 Z0 `" yprocedure TDBOper.PhotoToDB(const image:TSUIImagePanel;const Source:TCustomADODataset);
6 q3 i, M, P f: w: n4 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,最后一个是窗体名- r! @( I8 i, w
const tempFile='temp.jpg';7 o( v( |2 b2 o" _% p) n
const photo='照片实体';& q6 b* w+ z4 K' S. \- a4 @
const photosize='照片文件长度';
2 L( e! ]) i" ~5 T2 J% x/ X& mvar3 d; _0 m- h9 h9 X# j# j
f:file of Byte;
( n4 _7 {$ U- m( Y0 G- b# i9 K2 Dbegin+ ^' P# G! B$ j4 e3 z0 u: J
if Source.RecordCount<>0 then
: i A9 Z5 T; k$ U9 X8 n begin v9 {" Y2 G7 g" d- b0 ]6 ]0 N% h
Source.First;
' N5 f7 q/ y# a4 s' i- H Source.Edit;
6 r8 ?7 T, _ A: m$ Z8 A# M8 G image.Picture.SaveToFile(tempFile);
# u+ X* X2 {( G6 Q5 ^- @ try+ Z% h( T: v- K5 D% [
(TBlobField(Source.FieldByName(photo))).LoadFromFile(tempFile);
1 B0 H8 c. O5 x7 Z AssignFile(f,tempFile);
# u6 w6 t7 l$ x' k, M2 e2 s Reset(f);( M+ X. n, r; b+ n- O
Source.FieldValues[photosize]:=FileSize(f);
( ~+ [! n4 C$ U. k+ }, o& f1 { Source.Post;% Y, _3 |& \' g% W' T" n* }
finally
" E/ o" ]/ w: m" k! S7 u p2 r CloseFile(f);8 C: p: j8 K. N [4 m9 E1 @- _
DeleteFile(tempFile);1 w" v: x- b h. ] W
end;- l) O7 E9 _& \, H/ R& g
end;
3 L9 X# ]1 V+ G1 t3 x6 i5 Cend;
: _5 ^# D2 s8 n0 T2 V, U: Y1 ~//------------------------------------------------------------------从数据库中读出图片的函数
+ W x0 `/ i7 {' |# P3 Qfunction TDBOper.DBToPhoto(const Source:TCustomADODataset;const image:TSUIImagePanel):Integer; ( B4 ?' n/ N- d: U
//image这里输入放图片的控件,比如TImage,Source是要存入的数据库名
* |2 W; Y& e) g) G `" lconst tempFile='temp.jpg';( u$ S% g' T: h! m5 a- Y" |/ \
const photo='照片实体';
( l1 N; V0 |$ H! x+ Iconst photosize='照片文件长度';' {! y' P, B; K x8 a
begin
6 G4 L9 o6 ]' w: D result:=0;
+ ?7 ]/ _% }' N& m d" O! h; g if Source.RecordCount<>0 then
* n2 C9 E! N, G begin
) I! O; Q$ x7 L& V; _6 s //Source.First;
/ X2 k$ T- { X4 h (TBlobField(Source.FieldByName(photo))).SaveToFile(tempFile);
" ^( E: g, C& l/ J try
3 T, P% Q# C' a. k3 T) S3 N% t; U image.Picture.LoadFromFile(tempFile);
+ g o& u( z3 O) P6 D# s result:=Source.FieldByName(photosize).AsInteger;
% c; [3 O# O T& c& b finally
5 o+ o2 L0 \" K DeleteFile(tempFile);
" s9 C/ M; d+ d6 U end;
6 K" W7 k3 h) v$ X+ E5 R end+ s; r& C' N0 l/ X6 U' d+ i
else) s8 m/ g" \( I
result:=0;
7 p0 {$ p1 T1 |: ~9 Y" dend; |