获取磁盘容量方法 C#/C++

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#只能一次性获取所有的磁盘，所以如果指定某个磁盘的话则需要进行判断，并且获取到的空间单位为字节（Byte）

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 函数在MSDN上解释

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

GetDiskFreeSpaceEx获取到的数据单位同样为Byte