unit2.pas

《Delphi7编程100例》代码,书配资料

unit Unit2;

{$WARN SYMBOL_PLATFORM OFF}

interface

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

type
  TServerSample = class(TRemoteDataModule, IServerSample)
    ADOConnection1: TADOConnection;
    DataSetProvider1: TDataSetProvider;
    ADOQuery1: TADOQuery;
  private
    { Private declarations }
  protected
    class procedure UpdateRegistry(Register: Boolean; const ClassID, ProgID: string); override;
    function NewMethod(Param1: Integer): WideString; safecall;
  public
    { Public declarations }
  end;

implementation

{$R *.DFM}

class procedure TServerSample.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;

function TServerSample.NewMethod(Param1: Integer): WideString;
begin
  ADOQuery1.Close;
  ADOQuery1.SQL.Clear;
  ADOQuery1.SQL.Add('Select * from id where code="' + Inttostr(Param1) +'"');
  ADOQuery1.Open;
  Result := ADOQuery1.FieldByName('name').AsString;
  ADOQuery1.Close;  
end;

initialization
  TComponentFactory.Create(ComServer, TServerSample,
    Class_ServerSample, ciMultiInstance, tmApartment);
end.