xtd::io::drive_info Class Reference

Inheritance diagram for xtd::io::drive_info:

Definition

Provides access to information on a drive.

class core_export_ drive_info : public xtd::object

Inheritance

xtd::object → xtd::io::drive_info

Header

#include <xtd/io/drive_info>

Namespace

xtd::io

Library

xtd.core

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

This class models a drive and provides methods and properties to query for drive information. Use xtd::io::drive_info to determine what drives are available, and what type of drives they are. You can also query to determine the capacity and available free space on the drive.

Public Fields
static const drive_info	empty
	Represents the uninitialized xtd::io::drive_info object. This field is constant.

Public Constructors
	drive_info (const xtd::string &drive_name)
	Provides access to information on the specified drive.

Public Properties
size_t	available_free_space () const
	Indicates the amount of available free space on a drive, in bytes.
xtd::string	drive_format () const
	Gets the name of the file system, such as NTFS or FAT32.
xtd::io::drive_type	drive_type () const
	Gets the drive type, such as CD-ROM, removable, network, or fixed.
bool	is_ready () const noexcept
	Gets a value that indicates whether a drive is ready.
xtd::string	name () const noexcept
	Gets the name of a drive, such as C:.
xtd::io::directory_info	root_directory () const noexcept
	Gets the root directory of a drive.
size_t	total_free_space () const
	Gets the total amount of free space available on a drive, in bytes.
size_t	total_size () const
	Gets the total size of storage space on a drive, in bytes.
xtd::string	volume_label () const
	Gets the volume label of a drive.

Public Methods
xtd::string	to_string () const noexcept override
	Returns a drive name as a string.

Public Static Methods
static std::vector< xtd::io::drive_info >	get_drives () noexcept
	Retrieves the drive names of all logical drives on a computer.

Additional Inherited Members
Public Member Functions inherited from xtd::object
	object ()=default
	Create a new instance of the ultimate base class object.
virtual bool	equals (const object &obj) const noexcept
	Determines whether the specified object is equal to the current object.
virtual size_t	get_hash_code () const noexcept
	Serves as a hash function for a particular type.
virtual type_object	get_type () const noexcept
	Gets the type of the current instance.
template<typename object_t >
xtd::uptr< object_t >	memberwise_clone () const
	Creates a shallow copy of the current object.
Static Public Member Functions inherited from xtd::object
template<typename object_a_t , typename object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.
template<typename object_a_t , typename object_b_t >
static bool	reference_equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are the same instance.

Constructor & Destructor Documentation

drive_info()

xtd::io::drive_info::drive_info ( const xtd::string &  drive_name )

explicit

Provides access to information on the specified drive.

Parameters

drive_name

A valid drive path or drive letter. This can be either uppercase or lowercase, 'a' to 'z'. A null value is not valid.

Exceptions

xtd::argument_exception

drive_name does not refer to a valid drive.

Remarks

Use this class to obtain information on drives. The drive name must be either an uppercase or lowercase letter from 'a' to 'z'. You cannot use this method to obtain information on drive names that are null or use UNC (\server\share) paths.

Member Function Documentation

available_free_space()

size_t xtd::io::drive_info::available_free_space

(

)

const

Indicates the amount of available free space on a drive, in bytes.

Returns

The amount of free space available on the drive, in bytes.

Exceptions

xtd::unauthorized_access_exception	Access to the drive information is denied.
xtd::io::drive_not_found	The drive does not exist or is not mapped.
xtd::io::io_exception	An I/O error occurred (for example, a disk error or a drive was not ready).

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

This property indicates the amount of free space available on the drive. Note that this number may be different from the xtd::io::drive_info::total_free_space number because this property takes into account disk quotas.

drive_format()

xtd::string xtd::io::drive_info::drive_format

(

)

const

Gets the name of the file system, such as NTFS or FAT32.

Returns

The name of the file system on the specified drive.

Exceptions

xtd::unauthorized_access_exception	Access to the drive information is denied.
xtd::io::drive_not_found	The drive does not exist or is not mapped.
xtd::io::io_exception	An I/O error occurred (for example, a disk error or a drive was not ready).

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

Use xtd::io::drive_info::drive_format to determine what formatting a drive uses.

drive_type()

xtd::io::drive_type xtd::io::drive_info::drive_type

(

)

const

Gets the drive type, such as CD-ROM, removable, network, or fixed.

Returns

One of the enumeration values that specifies a drive type.

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

The xtd::io::drive_info::drive_type property indicates whether a drive is one of the following: CDRom, Fixed, Network, NoRootDirectory, Ram, Removable, or Unknown. These values are described in the xtd::io::drive_type enumeration.

is_ready()

bool xtd::io::drive_info::is_ready ( ) const

noexcept

Gets a value that indicates whether a drive is ready.

Returns

true if the drive is ready; false if the drive is not ready.

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

xtd::io::drive_info::is_ready indicates whether a drive is ready. For example, it indicates whether a CD is in a CD drive or whether a removable storage device is ready for read/write operations. If you do not test whether a drive is ready, and it is not ready, querying the drive using xtd::io::drive_info will raise an xtd::io::io_exception.

Do not rely on xtd::io::drive_info::is_ready to avoid catching exceptions from other members such as xtd::io::drive_info::total_size, xtd::io::drive_info::total_free_space, and xtd::io::drive_info::drive_format. Between the time that your code checks xtd::io::drive_info::is_ready and then accesses one of the other properties (even if the access occurs immediately after the check), a drive may have been disconnected or a disk may have been removed.

name()

xtd::string xtd::io::drive_info::name ( ) const

noexcept

Gets the name of a drive, such as C:.

Returns

The name of the drive.

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

This property is the name assigned to the drive, such as C:\ or E:.

root_directory()

xtd::io::directory_info xtd::io::drive_info::root_directory ( ) const

noexcept

Gets the root directory of a drive.

Returns

An object that contains the root directory of the drive.

total_free_space()

size_t xtd::io::drive_info::total_free_space

(

)

const

Gets the total amount of free space available on a drive, in bytes.

Returns

The total free space available on a drive, in bytes.

Exceptions

xtd::unauthorized_access_exception	Access to the drive information is denied.
xtd::io::drive_not_found	The drive does not exist or is not mapped.
xtd::io::io_exception	An I/O error occurred (for example, a disk error or a drive was not ready).

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

This property indicates the total amount of free space available on the drive, not just what is available to the current user.

total_size()

size_t xtd::io::drive_info::total_size

(

)

const

Gets the total size of storage space on a drive, in bytes.

Returns

The total size of the drive, in bytes.

Exceptions

xtd::unauthorized_access_exception	Access to the drive information is denied.
xtd::io::drive_not_found	The drive does not exist or is not mapped.
xtd::io::io_exception	An I/O error occurred (for example, a disk error or a drive was not ready).

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

This property indicates the total size of the drive in bytes, not just what is available to the current user.

volume_label()

xtd::string xtd::io::drive_info::volume_label

(

)

const

Gets the volume label of a drive.

Returns

The volume label.

Exceptions

xtd::unauthorized_access_exception	Access to the drive information is denied.
xtd::io::drive_not_found	The drive does not exist or is not mapped.
xtd::io::io_exception	An I/O error occurred (for example, a disk error or a drive was not ready).

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

The label length is determined by the operating system. For example, NTFS allows a volume label to be up to 32 characters long.

to_string()

xtd::string xtd::io::drive_info::to_string ( ) const

overridevirtualnoexcept

Returns a drive name as a string.

Returns

The name of the drive.

Remarks

This method returns the xtd::io::drive_info::name property.

Reimplemented from xtd::object.

get_drives()

static std::vector< xtd::io::drive_info > xtd::io::drive_info::get_drives ( )

staticnoexcept

Retrieves the drive names of all logical drives on a computer.

Returns

An array of type xtd::ioo::drive_info that represents the logical drives on a computer.

Exceptions

xtd::unauthorized_access_exception	Access to the drive information is denied.
xtd::io::io_exception	An I/O error occurred (for example, a disk error or a drive was not ready).

Examples

The following code example demonstrates the use of the xtd::io::drive_info class to display information about all of the drives on the current system.

#include <xtd/io/drive_info>
#include <xtd/console>
#include <xtd/startup>
 
using namespace xtd;
using namespace xtd::io;
 
class program {
public:
  static auto main() {
    auto all_drives = drive_info::get_drives();
    
    for (auto d : all_drives) {
      console::write_line("Drive {0}", d.name());
      console::write_line("  Drive type: {0}", d.drive_type());
      if (d.is_ready() == true) {
        console::write_line("  Volume label: {0}", d.volume_label());
        console::write_line("  File system: {0}", d.drive_format());
        console::write_line("  Available space to current user:{0, 15} bytes", d.available_free_space());
        console::write_line("  Total available space:          {0, 15} bytes", d.total_free_space());
        console::write_line("  Total size of drive:            {0, 15} bytes", d.total_size());
      }
    }
  }
};
 
startup_(program::main);
 
// This code produces the following output :
//
// Drive A:\
//   Drive type: Removable
// Drive C:\
//   Drive type: Fixed
//   Volume label:
//   File system: FAT32
//   Available space to current user:     4770430976 bytes
//   Total available space:               4770430976 bytes
//   Total size of drive:                10731683840 bytes
// Drive D:\
//   Drive type: Fixed
//   Volume label:
//   File system: NTFS
//   Available space to current user:    15114977280 bytes
//   Total available space:              15114977280 bytes
//   Total size of drive:                25958948864 bytes
// Drive E:\
//   Drive type: CDRom
//
// The actual output of this code will vary based on machine and the permissions
// granted to the user executing it.

Remarks

This method retrieves all logical drive names on a computer. You can use this information to iterate through the array and obtain information on the drives using other xtd::io::drive_info methods and properties. Use the xtd::io::drive_info::is_ready property to test whether a drive is ready because using this method on a drive that is not ready will throw a xtd::io::io_exception.

Member Data Documentation

empty

const drive_info xtd::io::drive_info::empty

static

Represents the uninitialized xtd::io::drive_info object. This field is constant.

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The documentation for this class was generated from the following file:

• xtd.core/include/xtd/io/drive_info.h