保存jpg:
TBlobField(query1.Fields[n]).LoadFrom('xxx.jpg');
读取并显示jpg:
var
Mem: TMemoryStream;
Jpg: TJpegImage;
begin
mem:=TMemoryStream.Create;
Jpg:=TJpegImage.Create;
TBlobField(query1.Fields[n]).SaveToStream(mem);
Jpg.LoadFromStream(mem);
image1.picture.Bitmap.Assign(Jpg);
mem.Free;
Jpg.Free;
end;
