disksize.cpp

C++ BUILDER精彩编程实例集锦(源码)3 第五部分 系统编程 第六部分 数据库应用

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "DiskSize.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
  this->Edit1->Text="";
  this->Edit2->Text="";
  this->Edit3->Text="";
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{
   char cDrive=this->DriveComboBox1->Drive;
   AnsiString StrDrive=cDrive;
   StrDrive+=":";
   ULARGE_INTEGER nTotalBytes, nTotalFreeBytes, nTotalAvailable;
  if( ::GetDiskFreeSpaceEx(StrDrive.c_str(), &nTotalAvailable,&nTotalBytes, &nTotalFreeBytes))
  {
     this->Edit1->Text=IntToStr((int)(nTotalBytes.QuadPart/1024/1024))+"MB";
     this->Edit3->Text=IntToStr((int)(nTotalFreeBytes.QuadPart/1024/1024))+"MB";
     this->Edit2->Text=IntToStr((int)(nTotalBytes.QuadPart/1024/1024)-(int)(nTotalFreeBytes.QuadPart/1024/1024))+"MB";
  }
  else
  {
     this->Edit1->Text="";
     this->Edit3->Text="";
     this->Edit2->Text="";
   }
}
//---------------------------------------------------------------------------