火车售票系统（毕业论文）

train_node.train_no=checi.train_no '+sq); Open; end;

if sq<>'' then GroupBox1.Show else

GroupBox1.Hide;

if Adoquery1.RecordCount>0 then begin

if edit1.Text='' then begin

train_no.Items.Clear; while not Adoquery1.Eof do begin

train_no.Items.Add(Adoquery1.FieldValues['train_node.train_no']); Adoquery1.Next; end;

Adoquery1.First; zhanm.Text:=edit2.Text;

train_no.ItemIndex:=0; Distance:=Adoquery1.RecNo-1; end;

if edit2.Text='' then begin

zhanm.Items.Clear; while not Adoquery1.Eof do begin

zhanm.Items.Add(Adoquery1.FieldValues['zhanm']); Adoquery1.Next; end;

Adoquery1.First; train_no.Text:=edit1.Text; zhanm.ItemIndex:=0;

Distance:=Adoquery1.RecNo-1; end;

amount.DataField:='amount'+riqi+leixing; price.DataField:='price'+leixing; end else begin

GroupBox1.Hide;

showmessage('对不起！目前此列车还未开通！请选乘就近的火车站');

Edit1.Text:=''; Edit2.Text:=''; end;

GroupBox2.Hide; end;

procedure Tmain.train_noChange(Sender: TObject); begin

Adoquery1.MoveBy(train_no.ItemIndex-Distance); Distance:=train_no.ItemIndex; end;

procedure Tmain.zhanmChange(Sender: TObject); begin

Adoquery1.MoveBy(zhanm.ItemIndex-Distance); Distance:=zhanm.ItemIndex; end;

procedure Tmain.r_riqiChange(Sender: TObject);

begin

riqi:=inttostr(r_riqi.ItemIndex);

amount.DataField:='amount'+riqi+leixing; price.DataField:='price'+leixing; end;

procedure Tmain.r_leixingChange(Sender: TObject); begin

leixing:=inttostr(r_leixing.ItemIndex+7); amount.DataField:='amount'+riqi+leixing; price.DataField:='price'+leixing; end;

procedure Tmain.buyClick(Sender: TObject); var Qbuy:TADOQuery; amount,number:string; sqlstr:string;

num_a,num_num,zuo:integer; begin

amount:='amount'+riqi+leixing;