nPictureDialog1.Execute then
Image1.Picture.LoadFromFile(OpenPictureDialog1.FileName);
end;
分别按学号、姓名、寝室号查找学生：
procedure TForm_info_q2.Button1Click(Sender: TObject);
begin
Image1.Picture:=nil; //照片置空
query1.Close;
query1.SQL.Clear;
query1.SQL.Add('select * from student where sno=:sno');
query1.ParamByName('sno').AsString:=Edit5.Text;
query1.Open;
if query1.RecordCount>0 then //如果有这个学号的学生，载入照片
Image1.Picture.LoadFromFile(form_main.projectdir.caption+'\image\'+query1.FieldList.Fields[0].Value+'.bmp')
else
begin
showmessage('没有这个学生！');
Edit5.SetFocus;
end;
end;
添加学生信息窗体：
procedure TForm_infos_s.Button1Click(Sender: TObject);
begin
if Edit1.Text<>'' then
begin
with Form_infos_s.query1 do
begin
close;
sql.Clear;
sql.Add('insert into student values(:sno,:sdept,:time_s,:sname,:ssex,:Num_room,:Num_bed,:remark)');
ParamByName('sno').AsString:=Form_infos_s.Edit1.Text;
ParamByName('sdept').AsString:=Form_infos_s.ComboBox1.Text;
ParamByName('time_s').AsString:=Form_infos_s.ComboBox2.Text;
ParamByName('sname').AsString:=Form_infos_s.Edit2.Text;
if RadioButton1.Checked then
ParamByName('ssex').AsString:='男';
if RadioButton2.Checked then
ParamByName('ssex').AsString:='女';
ParamByName('Num_room').AsString:=Form_infos_s.Edit3.Text;
ParamByName('Num_bed').AsString:=Form_infos_s.Edit4.Text;
ParamByName('remark').AsString:=Form_infos_s.Memo1.Text;
Form_infos_s.query1.ExecSQL;
//if Form_infos.Image1.Picture.
Form_infos_s.Image1.Picture.SaveToFile(form_main.projectdir.caption+'\image\'+Edit1.Text+'.bmp');
query2.ParamByName('Num_room').AsString:=edit3.Text;
query2.ExecSQL;
showmessage('OK,添加成功!');
Form_infos_s.Close;
end;
end
else
begin
showmessage('请填写学号!');
end;
end;
procedure TForm_infos_s.Edit1Exit(Sender: TObject);
begin
query3.Close; // 下面的query3.Open使得query3处于active状态，不再接受再次的参数赋值
query3.ParamByName('sno').AsString:=edit1.Text;
query3.Open;
if query3.RecordCount>0 then
