Returns the extension of the specified path string.
(in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function GetExtension ( _
path As String _
) As String
Dim path As String
Dim returnValue As String
returnValue = Path.GetExtension(path)
public static string GetExtension(
string path
)
public:
static String^ GetExtension(
String^ path
)
public static function GetExtension(
path : String
) : String
Parameters
- path
- Type: System..::.String
The path string from which to get the extension.
Return Value
Type:
System..::.StringA String containing the extension of the specified path (including the "."), nullNothingnullptra null reference (Nothing in Visual Basic), or Empty. If path is nullNothingnullptra null reference (Nothing in Visual Basic), GetExtension returns nullNothingnullptra null reference (Nothing in Visual Basic). If path does not have extension information, GetExtension returns Empty.
The extension of path is obtained by searching path for a period (.), starting with the last character in path and continuing toward the start of path. If a period is found before a DirectorySeparatorChar or AltDirectorySeparatorChar character, the returned string contains the period and the characters after it; otherwise, Empty is returned.
For a list of common I/O tasks, see Common I/O Tasks.
The following code example demonstrates using the GetExtension method on a Windows-based desktop platform.
Dim fileName As String = "C:\mydir.old\myfile.ext"
Dim pathname As String = "C:\mydir.old\"
Dim extension As String
extension = Path.GetExtension(fileName)
Console.WriteLine("GetExtension('{0}') returns '{1}'", fileName, extension)
extension = Path.GetExtension(pathname)
Console.WriteLine("GetExtension('{0}') returns '{1}'", pathname, extension)
' This code produces output similar to the following:
'
' GetExtension('C:\mydir.old\myfile.ext') returns '.ext'
' GetExtension('C:\mydir.old\') returns ''
string fileName = @"C:\mydir.old\myfile.ext";
string path = @"C:\mydir.old\";
string extension;
extension = Path.GetExtension(fileName);
Console.WriteLine("GetExtension('{0}') returns '{1}'",
fileName, extension);
extension = Path.GetExtension(path);
Console.WriteLine("GetExtension('{0}') returns '{1}'",
path, extension);
// This code produces output similar to the following:
//
// GetExtension('C:\mydir.old\myfile.ext') returns '.ext'
// GetExtension('C:\mydir.old\') returns ''
String^ fileName = "C:\\mydir.old\\myfile.ext";
String^ path = "C:\\mydir.old\\";
String^ extension;
extension = Path::GetExtension( fileName );
Console::WriteLine( "GetExtension('{0}') returns '{1}'", fileName, extension );
extension = Path::GetExtension( path );
Console::WriteLine( "GetExtension('{0}') returns '{1}'", path, extension );
// This code produces output similar to the following:
//
// GetExtension('C:\mydir.old\myfile.ext') returns '.ext'
// GetExtension('C:\mydir.old\') returns ''
var fileName : String = "C:\\mydir.old\\myfile.ext";
var path : String = "C:\\mydir.old\\";
var extension : String;
extension = Path.GetExtension(fileName);
Console.WriteLine("GetExtension('{0}') returns '{1}'",
fileName, extension);
extension = Path.GetExtension(path);
Console.WriteLine("GetExtension('{0}') returns '{1}'",
path, extension);
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0, 1.0
XNA Framework
Supported in: 3.0, 2.0, 1.0
Reference
Other Resources