Directory.GetLogicalDrives Metode
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mengambil nama drive logis pada komputer ini dalam bentuk "<drive letter>:\".
public:
static cli::array <System::String ^> ^ GetLogicalDrives();public static string[] GetLogicalDrives ();static member GetLogicalDrives : unit -> string[]Public Shared Function GetLogicalDrives () As String()Mengembalikan
String[]
Kandar logis pada komputer ini.
Pengecualian
Terjadi kesalahan I/O (misalnya, kesalahan disk).
Pemanggil tidak memiliki izin yang diperlukan.
Contoh
Contoh berikut menggunakan GetLogicalDrives metode untuk menetapkan nama setiap drive pada komputer panggilan ke array string. Setiap anggota array string ini kemudian dicetak ke konsol. Contoh dikonfigurasi untuk menangkap semua kesalahan yang umum untuk metode ini.
using namespace System;
class Class1
{
public:
void PrintFileSystemEntries( String^ path )
{
try
{
// Obtain the file system entries in the directory path.
array<String^>^directoryEntries = System::IO::Directory::GetFileSystemEntries( path );
for ( int i = 0; i < directoryEntries->Length; i++ )
{
System::Console::WriteLine( directoryEntries[ i ] );
}
}
catch ( ArgumentNullException^ )
{
System::Console::WriteLine( "Path is a null reference." );
}
catch ( System::Security::SecurityException^ )
{
System::Console::WriteLine( "The caller does not have the \HelloServer' required permission." );
}
catch ( ArgumentException^ )
{
System::Console::WriteLine( "Path is an empty String, \HelloServer' contains only white spaces, \HelloServer' or contains invalid characters." );
}
catch ( System::IO::DirectoryNotFoundException^ )
{
System::Console::WriteLine( "The path encapsulated in the \HelloServer' Directory object does not exist." );
}
}
void PrintFileSystemEntries( String^ path, String^ pattern )
{
try
{
// Obtain the file system entries in the directory
// path that match the pattern.
array<String^>^directoryEntries = System::IO::Directory::GetFileSystemEntries( path, pattern );
for ( int i = 0; i < directoryEntries->Length; i++ )
{
System::Console::WriteLine( directoryEntries[ i ] );
}
}
catch ( ArgumentNullException^ )
{
System::Console::WriteLine( "Path is a null reference." );
}
catch ( System::Security::SecurityException^ )
{
System::Console::WriteLine( "The caller does not have the \HelloServer' required permission." );
}
catch ( ArgumentException^ )
{
System::Console::WriteLine( "Path is an empty String, \HelloServer' contains only white spaces, \HelloServer' or contains invalid characters." );
}
catch ( System::IO::DirectoryNotFoundException^ )
{
System::Console::WriteLine( "The path encapsulated in the \HelloServer' Directory object does not exist." );
}
}
// Print out all logical drives on the system.
void GetLogicalDrives()
{
try
{
array<String^>^drives = System::IO::Directory::GetLogicalDrives();
for ( int i = 0; i < drives->Length; i++ )
{
System::Console::WriteLine( drives[ i ] );
}
}
catch ( System::IO::IOException^ )
{
System::Console::WriteLine( "An I/O error occurs." );
}
catch ( System::Security::SecurityException^ )
{
System::Console::WriteLine( "The caller does not have the \HelloServer' required permission." );
}
}
void GetParent( String^ path )
{
try
{
System::IO::DirectoryInfo^ directoryInfo = System::IO::Directory::GetParent( path );
System::Console::WriteLine( directoryInfo->FullName );
}
catch ( ArgumentNullException^ )
{
System::Console::WriteLine( "Path is a null reference." );
}
catch ( ArgumentException^ )
{
System::Console::WriteLine( "Path is an empty String, \HelloServer' contains only white spaces, or \HelloServer' contains invalid characters." );
}
}
void Move( String^ sourcePath, String^ destinationPath )
{
try
{
System::IO::Directory::Move( sourcePath, destinationPath );
System::Console::WriteLine( "The directory move is complete." );
}
catch ( ArgumentNullException^ )
{
System::Console::WriteLine( "Path is a null reference." );
}
catch ( System::Security::SecurityException^ )
{
System::Console::WriteLine( "The caller does not have the \HelloServer' required permission." );
}
catch ( ArgumentException^ )
{
System::Console::WriteLine( "Path is an empty String, \HelloServer' contains only white spaces, \HelloServer' or contains invalid characters." );
}
catch ( System::IO::IOException^ )
{
System::Console::WriteLine( "An attempt was made to move a \HelloServer' directory to a different \HelloServer' volume, or destDirName \HelloServer' already exists." );
}
}
};
int main()
{
Class1 * snippets = new Class1;
String^ path = System::IO::Directory::GetCurrentDirectory();
String^ filter = "*.exe";
snippets->PrintFileSystemEntries( path );
snippets->PrintFileSystemEntries( path, filter );
snippets->GetLogicalDrives();
snippets->GetParent( path );
snippets->Move( "C:\\proof", "C:\\Temp" );
return 0;
}
using System;
namespace GetFileSystemEntries
{
class Class1
{
static void Main(string[] args)
{
Class1 snippets = new Class1();
string path = System.IO.Directory.GetCurrentDirectory();
string filter = "*.exe";
snippets.PrintFileSystemEntries(path);
snippets.PrintFileSystemEntries(path, filter);
snippets.GetLogicalDrives();
snippets.GetParent(path);
snippets.Move("C:\\proof", "C:\\Temp");
}
void PrintFileSystemEntries(string path)
{
try
{
// Obtain the file system entries in the directory path.
string[] directoryEntries =
System.IO.Directory.GetFileSystemEntries(path);
foreach (string str in directoryEntries)
{
System.Console.WriteLine(str);
}
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, " +
"or contains invalid characters.");
}
catch (System.IO.DirectoryNotFoundException)
{
System.Console.WriteLine("The path encapsulated in the " +
"Directory object does not exist.");
}
}
void PrintFileSystemEntries(string path, string pattern)
{
try
{
// Obtain the file system entries in the directory
// path that match the pattern.
string[] directoryEntries =
System.IO.Directory.GetFileSystemEntries(path, pattern);
foreach (string str in directoryEntries)
{
System.Console.WriteLine(str);
}
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, " +
"or contains invalid characters.");
}
catch (System.IO.DirectoryNotFoundException)
{
System.Console.WriteLine("The path encapsulated in the " +
"Directory object does not exist.");
}
}
// Print out all logical drives on the system.
void GetLogicalDrives()
{
try
{
string[] drives = System.IO.Directory.GetLogicalDrives();
foreach (string str in drives)
{
System.Console.WriteLine(str);
}
}
catch (System.IO.IOException)
{
System.Console.WriteLine("An I/O error occurs.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
}
void GetParent(string path)
{
try
{
System.IO.DirectoryInfo directoryInfo =
System.IO.Directory.GetParent(path);
System.Console.WriteLine(directoryInfo.FullName);
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, or " +
"contains invalid characters.");
}
}
void Move(string sourcePath, string destinationPath)
{
try
{
System.IO.Directory.Move(sourcePath, destinationPath);
System.Console.WriteLine("The directory move is complete.");
}
catch (ArgumentNullException)
{
System.Console.WriteLine("Path is a null reference.");
}
catch (System.Security.SecurityException)
{
System.Console.WriteLine("The caller does not have the " +
"required permission.");
}
catch (ArgumentException)
{
System.Console.WriteLine("Path is an empty string, " +
"contains only white spaces, " +
"or contains invalid characters.");
}
catch (System.IO.IOException)
{
System.Console.WriteLine("An attempt was made to move a " +
"directory to a different " +
"volume, or destDirName " +
"already exists.");
}
}
}
}
open System
open System.IO
open System.Security
let printFileSystemEntries path =
try
// Obtain the file system entries in the directory path.
let directoryEntries = Directory.GetFileSystemEntries path
for str in directoryEntries do
printfn $"{str}"
with
| :? ArgumentNullException ->
printfn "Path is a null reference."
| :? SecurityException ->
printfn $"The caller does not have the required permission."
| :? ArgumentException ->
printfn $"Path is an empty string, contains only white spaces, or contains invalid characters."
| :? DirectoryNotFoundException ->
printfn $"The path encapsulated in the Directory object does not exist."
let printFileSystemEntriesPattern path pattern =
try
// Obtain the file system entries in the directory
// path that match the pattern.
let directoryEntries = Directory.GetFileSystemEntries(path, pattern)
for str in directoryEntries do
printfn $"{str}"
with
| :? ArgumentNullException -> printfn "Path is a null reference."
| :? SecurityException -> printfn "The caller does not have the required permission."
| :? ArgumentException -> printfn "Path is an empty string, contains only white spaces, or contains invalid characters."
| :? DirectoryNotFoundException -> printfn "The path encapsulated in the Directory object does not exist."
// Print out all logical drives on the system.
let getLogicalDrives () =
try
let drives = Directory.GetLogicalDrives()
for str in drives do
printfn $"{str}"
with
| :? IOException -> printfn "An I/O error occurs."
| :? SecurityException -> printfn "The caller does not have the required permission."
let getParent path =
try
let directoryInfo = Directory.GetParent path
printfn $"{directoryInfo.FullName}"
with
| :? ArgumentNullException -> printfn "Path is a null reference."
| :? ArgumentException -> printfn "Path is an empty string, contains only white spaces, or contains invalid characters."
let move sourcePath destinationPath =
try
Directory.Move(sourcePath, destinationPath)
printfn "The directory move is complete."
with
| :? ArgumentNullException -> printfn "Path is a null reference."
| :? SecurityException -> printfn "The caller does not have the required permission."
| :? ArgumentException -> printfn "Path is an empty string, contains only white spaces, or contains invalid characters."
| :? IOException -> printfn "An attempt was made to move a directory to a different volume, or destDirName already exists."
let path = Directory.GetCurrentDirectory()
let filter = "*.exe"
printFileSystemEntries path
printFileSystemEntriesPattern path filter
getLogicalDrives ()
getParent path
move "C:\\proof" "C:\\Temp"
Option Explicit On
Option Strict On
Namespace GetFileSystemEntries
Class Class1
Overloads Shared Sub Main(ByVal args() As String)
Dim snippets As New Class1()
Dim path As String = System.IO.Directory.GetCurrentDirectory()
Dim filter As String = "*.exe"
snippets.PrintFileSystemEntries(path)
snippets.PrintFileSystemEntries(path, filter)
snippets.GetLogicalDrives()
snippets.GetParent(path)
snippets.Move("C:\proof", "C:\Temp")
End Sub
Sub PrintFileSystemEntries(ByVal path As String)
Try
' Obtain the file system entries in the directory path.
Dim directoryEntries As String()
directoryEntries = System.IO.Directory.GetFileSystemEntries(path)
Dim str As String
For Each str In directoryEntries
System.Console.WriteLine(str)
Next str
Catch exp As ArgumentNullException
System.Console.WriteLine("Path is a null reference.")
Catch exp As System.Security.SecurityException
System.Console.WriteLine("The caller does not have the " + _
"required permission.")
Catch exp As ArgumentException
System.Console.WriteLine("Path is an empty string, " + _
"contains only white spaces, " + _
"or contains invalid characters.")
Catch exp As System.IO.DirectoryNotFoundException
System.Console.WriteLine("The path encapsulated in the " + _
"Directory object does not exist.")
End Try
End Sub
Sub PrintFileSystemEntries(ByVal path As String, _
ByVal pattern As String)
Try
' Obtain the file system entries in the directory
' path that match the pattern.
Dim directoryEntries As String()
directoryEntries = _
System.IO.Directory.GetFileSystemEntries(path, pattern)
Dim str As String
For Each str In directoryEntries
System.Console.WriteLine(str)
Next str
Catch exp As ArgumentNullException
System.Console.WriteLine("Path is a null reference.")
Catch exp As System.Security.SecurityException
System.Console.WriteLine("The caller does not have the " + _
"required permission.")
Catch exp As ArgumentException
System.Console.WriteLine("Path is an empty string, " + _
"contains only white spaces, " + _
"or contains invalid characters.")
Catch exp As System.IO.DirectoryNotFoundException
System.Console.WriteLine("The path encapsulated in the " + _
"Directory object does not exist.")
End Try
End Sub
' Print out all logical drives on the system.
Sub GetLogicalDrives()
Try
Dim drives As String()
drives = System.IO.Directory.GetLogicalDrives()
Dim str As String
For Each str In drives
System.Console.WriteLine(str)
Next str
Catch exp As System.IO.IOException
System.Console.WriteLine("An I/O error occurs.")
Catch exp As System.Security.SecurityException
System.Console.WriteLine("The caller does not have the " + _
"required permission.")
End Try
End Sub
Sub GetParent(ByVal path As String)
Try
Dim directoryInfo As System.IO.DirectoryInfo
directoryInfo = System.IO.Directory.GetParent(path)
System.Console.WriteLine(directoryInfo.FullName)
Catch exp As ArgumentNullException
System.Console.WriteLine("Path is a null reference.")
Catch exp As ArgumentException
System.Console.WriteLine("Path is an empty string, " + _
"contains only white spaces, or " + _
"contains invalid characters.")
End Try
End Sub
Sub Move(ByVal sourcePath As String, ByVal destinationPath As String)
Try
System.IO.Directory.Move(sourcePath, destinationPath)
System.Console.WriteLine("The directory move is complete.")
Catch exp As ArgumentNullException
System.Console.WriteLine("Path is a null reference.")
Catch exp As System.Security.SecurityException
System.Console.WriteLine("The caller does not have the " + _
"required permission.")
Catch exp As ArgumentException
System.Console.WriteLine("Path is an empty string, " + _
"contains only white spaces, " + _
"or contains invalid characters.")
Catch exp As System.IO.IOException
System.Console.WriteLine("An attempt was made to move a " + _
"directory to a different " + _
"volume, or destDirName " + _
"already exists.")
End Try
End Sub
End Class
End Namespace
Keterangan
GetLogicalDrives mengembalikan semua drive yang dapat diakses pada komputer tertentu, termasuk drive floppy dan drive optik apa pun.
Untuk daftar tugas I/O umum, lihat Tugas I/O Umum.
Berlaku untuk
Lihat juga
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