组合框的应用

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    ComboBox1: TComboBox;
    ComboBox2: TComboBox;
    ComboBox3: TComboBox;
    ComboBox4: TComboBox;
    GroupBox1: TGroupBox;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Button1: TButton;
    Button2: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  label5.Caption := '';
  combobox1.ItemIndex := -1;
  combobox2.ItemIndex := -1;
  combobox3.ItemIndex := -1;
  combobox4.ItemIndex := -1;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  i: integer;
  p: string;
begin
  p := '你选的机器配置：' + #13;
  i := combobox1.ItemIndex;
  p := p + '机型：' +combobox1.Items[i] + #13;
  i := combobox2.ItemIndex;
  p := p + 'CPU：' + combobox2.Items[i] + #13;
  i := combobox3.ItemIndex;
  p := p + '内存：' +combobox3.Items[i] + #13;
  i := combobox4.ItemIndex;
  p := p + '硬盘：' + combobox4.Items[i];
  label5.Caption := p;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  combobox1.Items.Add('IBM');
  combobox1.Items.Add('AST');
  combobox1.Items.Add('Compaq');
  combobox1.Items.Add('长城');
  combobox1.Items.Add('联想');
  combobox1.Items.Add('清华同方');
  combobox2.Items.Add('586/133');
  combobox2.Items.Add('586/200');
  combobox2.Items.Add('PII/233');
  combobox2.Items.Add('PII/400');
  combobox2.Items.Add('PⅢ/450');
  combobox2.Items.Add('PⅢ/600');
  combobox3.Items.Add('16MB');
  combobox3.Items.Add('32MB');
  combobox3.Items.Add('64MB');
  combobox3.Items.Add('128MB');
  combobox3.Items.Add('256MB');
  combobox4.Items.Add('2.5G');
  combobox4.Items.Add('3.2G');
  combobox4.Items.Add('4.3G');
  combobox4.Items.Add('9G');
  combobox4.Items.Add('15G');
end;

end.