main.cpp

AbsDataBase5.16 最新版

//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "Main.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma link "ABSMain"
 
#pragma resource "*.dfm"
TfrmMain *frmMain;

const AnsiString DataBaseFileName = "..\\..\\Data\\Demos.abs";

//---------------------------------------------------------------------------
__fastcall TfrmMain::TfrmMain(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TfrmMain::FormCreate(TObject *Sender)
{
  dbDemos->Close();
  dbDemos->DatabaseFileName = ExtractFilePath(Application->ExeName) + DataBaseFileName;
  dbDemos->Open();
  tVenues->Open();
  cbGraphicAlgorithm->ItemIndex = 2;
  cbMemoAlgorithm->ItemIndex = 1;
}
//---------------------------------------------------------------------------

void __fastcall TfrmMain::btCreateClick(TObject *Sender)
{
TCompressionAlgorithm GraphicCompressionAlgorithm;
TCompressionAlgorithm MemoCompressionAlgorithm;
TFileStream *f;

  GraphicCompressionAlgorithm = TCompressionAlgorithm(cbGraphicAlgorithm->ItemIndex);
  MemoCompressionAlgorithm = TCompressionAlgorithm(cbMemoAlgorithm->ItemIndex);
  VenuesDB->Close();
  VenuesDB->PageSize = 512;
  VenuesDB->MaxConnections = 20;
  VenuesDB->CreateDatabase();
  tNewVenues->AdvFieldDefs->Clear();
  tNewVenues->AdvFieldDefs->Add("VenueNo", aftAutoInc);
  tNewVenues->AdvFieldDefs->Add("Venue", aftString, 30);
  tNewVenues->AdvFieldDefs->Add("Capacity", aftInteger);
  tNewVenues->AdvFieldDefs->Add("Venue_Map", aftGraphic, 0, False, GraphicCompressionAlgorithm,
	  StrToInt(edGraphicMode->Text));
  tNewVenues->AdvFieldDefs->Add("Remarks", aftMemo, 0, False, MemoCompressionAlgorithm,
	  StrToInt(edMemoMode->Text));
  tNewVenues->CreateTable();
  tNewVenues->BatchMove(tVenues, bmtCopy, "");
  VenuesDB->Close();
  VenuesDB->CompactDatabase();
  f = new TFileStream(VenuesDB->DatabaseFileName, fmOpenRead+fmShareDenyNone);
  lbVenuesDBSize->Caption = IntToStr(int(f->Size/1024))+" Kb";
  delete f;
  tNewVenues->Open();
}
//---------------------------------------------------------------------------