擷取磁碟容量方法 C#/C++

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• C#方法

  string driveName ="C:\\";

  System.IO.DriveInfo[] drivers = System.IO.DriveInfo.GetDrives();

  foreach (var drive in drivers)

  {

      if(driveName == drive.Name)

      Console.WriteLine(drive.TotalFreeSpace / (1024 *1024*1024*1.0f) +"G");

  }

    

  C#只能一次性擷取所有的磁碟，所以如果指定某個磁碟的話則需要進行判斷，並且擷取到的空間單位為位元組（Byte）

    

• C++方法

  DWORD64 qwFreeBytes, qwFreeBytesToCaller, qwTotalBytes;

  bResult =GetDiskFreeSpaceEx(TEXT("C:"),

  (PULARGE_INTEGER)&qwFreeBytesToCaller,

  (PULARGE_INTEGER)&qwTotalBytes,

  (PULARGE_INTEGER)&qwFreeBytes);

  if (bResult)

  {

      cout <<"Use GetDiskFreeSpaceEx"<< endl;

      cout <<"Total Byte: "<< qwTotalBytes << endl;

      cout <<"FreeByte: "<< qwFreeBytes << endl;

      cout <<"FreeByte available: "<< qwFreeBytesToCaller << endl;

      cout <<"Free G is "<< qwFreeBytesToCaller /1024/1024/1024*1.0f << endl;

  }

    

  GetDiskFreeSpaceEx 函數在MSDN上解釋

  BOOL WINAPI GetDiskFreeSpaceEx(
  _In_opt_  LPCTSTR         lpDirectoryName,
  _Out_opt_ PULARGE_INTEGER lpFreeBytesAvailable,
  _Out_opt_ PULARGE_INTEGER lpTotalNumberOfBytes,
  _Out_opt_ PULARGE_INTEGER lpTotalNumberOfFreeBytes
  );

    

  GetDiskFreeSpaceEx擷取到的資料單位同樣為Byte

    

    

擷取磁碟容量方法 C#/C++