unit2.pas

基于delphi的编程实例

unit Unit2;

{$WARN SYMBOL_PLATFORM OFF}

interface

uses
  Windows, Messages, SysUtils, Classes, ComServ, ComObj, VCLCom, DataBkr,
  DBClient, Project1_TLB, StdVcl, Provider, DB, DBTables;

type
  TLoginServ = class(TRemoteDataModule, ILoginServ)
    Query1: TQuery;
    DataSetProvider1: TDataSetProvider;
  private
    { Private declarations }
  protected
    class procedure UpdateRegistry(Register: Boolean; const ClassID, ProgID: string); override;
    procedure Login(const User, Password: WideString); safecall;
    procedure Logout(const User: WideString); safecall;
  public
    { Public declarations }
  end;

implementation

uses Unit1;

{$R *.DFM}

class procedure TLoginServ.UpdateRegistry(Register: Boolean; const ClassID, ProgID: string);
begin
  if Register then
  begin
    inherited UpdateRegistry(Register, ClassID, ProgID);
    EnableSocketTransport(ClassID);
    EnableWebTransport(ClassID);
  end else
  begin
    DisableSocketTransport(ClassID);
    DisableWebTransport(ClassID);
    inherited UpdateRegistry(Register, ClassID, ProgID);
  end;
end;

procedure TLoginServ.Login(const User, Password: WideString);
begin
  Form1.ListBox1.Items.AddObject(User,TStringstream.Create(Password));
end;

procedure TLoginServ.Logout(const User: WideString);
begin
  with Form1.ListBox1 do
  begin
    (Items.Objects[Items.IndexOf(User)]).Free;
    Items.Delete(Items.IndexOf(User));
  end;
end;

initialization
  TComponentFactory.Create(ComServer, TLoginServ,
    Class_LoginServ, ciMultiInstance, tmApartment);
end.