请教,这段代码有什么问题?
请教,这段代码有什么问题?为什么下载到电脑的文件都7 个字节?
procedure TForm1.Button10Click(Sender: TObject); //添加附档
begin
if opendialog1.Execute then
with adoquery1 do begin
close;
sql.Clear;
sql.Add('select * from T_dropdownexp');
open;
adoquery1.Edit;
TBlobField(adoquery1.FieldbyName('addition')).LoadFromFile(opendialog1.FileName);
adoquery1.Post;
Messagebox(Getactivewindow(),'Additional file saved','Save',MB_OK);
edit19.Text:=opendialog1.FileName;
end;
end;
procedure TForm1.Button11Click(Sender: TObject); //载入附档
begin
if savedialog1.Execute then
TBlobField(adoQuery1.FieldByName('addition')).SaveTofile(savedialog1.FileName);
end;