search.pas

这是一套全面的网络组件

unit Search;

interface

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

type
  TSearchDialog = class(TForm)
    Label1: TLabel;
    ComboBox1: TComboBox;
    Label2: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    Button2: TButton;
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
  private
    { Private declarations }
  public
    { Public declarations }
    class function GetSearchCriteria(var S: string): boolean;
  end;

var
  SearchDialog: TSearchDialog;

implementation

{$R *.DFM}
class function TSearchDialog.GetSearchCriteria(var S: string): boolean;
begin
  Result := False;
  with TSearchDialog.Create(nil) do try
    ComboBox1.ItemIndex := 0;
    if ShowModal = mrOk then begin
      Result := True;
      S := ComboBox1.Text + ' ' + Edit1.Text;
    end;
  finally
    Release;
  end;
end;

procedure TSearchDialog.FormCloseQuery(Sender: TObject;
  var CanClose: Boolean);
begin
  CanClose := (ModalResult <> mrOk) or
              ((ComboBox1.Text <> '') and (Edit1.Text <> ''));
end;

end.