Gets the root directory information of the specified path.
(in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function GetPathRoot ( _
path As String _
) As String
Dim path As String
Dim returnValue As String
returnValue = Path.GetPathRoot(path)
public static string GetPathRoot(
string path
)
public:
static String^ GetPathRoot(
String^ path
)
public static function GetPathRoot(
path : String
) : String
Parameters
- path
- Type: System..::.String
The path from which to obtain root directory information.
Return Value
Type:
System..::.StringA string containing the root directory of path, such as "C:\", or nullNothingnullptra null reference (Nothing in Visual Basic) if path is nullNothingnullptra null reference (Nothing in Visual Basic), or an empty string if path does not contain root directory information.
This method does not verify that the path or file name exists.
Possible patterns for the string returned by this method are as follows:
An empty string (path specified a relative path on the current drive or volume).
"/" (path specified an absolute path on the current drive).
"X:" (path specified a relative path on a drive, where X represents a drive or volume letter).
"X:/" (path specified an absolute path on a given drive).
"\\ComputerName\SharedFolder" (a UNC path).
The .NET Framework does not support direct access to physical disks through paths that are device names, such as "\\.\PHYSICALDRIVE0 ".
For a list of common I/O tasks, see Common I/O Tasks.
The following code example demonstrates a use of the GetPathRoot method.
Dim pathname As String = "\mydir\"
Dim fileName As String = "myfile.ext"
Dim fullPath As String = "C:\mydir\myfile.ext"
Dim pathnameRoot As String
pathnameRoot = Path.GetPathRoot(pathname)
Console.WriteLine("GetPathRoot('{0}') returns '{1}'", pathname, pathnameRoot)
pathnameRoot = Path.GetPathRoot(fileName)
Console.WriteLine("GetPathRoot('{0}') returns '{1}'", fileName, pathnameRoot)
pathnameRoot = Path.GetPathRoot(fullPath)
Console.WriteLine("GetPathRoot('{0}') returns '{1}'", fullPath, pathnameRoot)
' This code produces output similar to the following:
'
' GetPathRoot('\mydir\') returns '\'
' GetPathRoot('myfile.ext') returns ''
' GetPathRoot('C:\mydir\myfile.ext') returns 'C:\'
string path = @"\mydir\";
string fileName = "myfile.ext";
string fullPath = @"C:\mydir\myfile.ext";
string pathRoot;
pathRoot = Path.GetPathRoot(path);
Console.WriteLine("GetPathRoot('{0}') returns '{1}'",
path, pathRoot);
pathRoot = Path.GetPathRoot(fileName);
Console.WriteLine("GetPathRoot('{0}') returns '{1}'",
fileName, pathRoot);
pathRoot = Path.GetPathRoot(fullPath);
Console.WriteLine("GetPathRoot('{0}') returns '{1}'",
fullPath, pathRoot);
// This code produces output similar to the following:
//
// GetPathRoot('\mydir\') returns '\'
// GetPathRoot('myfile.ext') returns ''
// GetPathRoot('C:\mydir\myfile.ext') returns 'C:\'
String^ path = "\\mydir\\";
String^ fileName = "myfile.ext";
String^ fullPath = "C:\\mydir\\myfile.ext";
String^ pathRoot;
pathRoot = Path::GetPathRoot( path );
Console::WriteLine( "GetPathRoot('{0}') returns '{1}'", path, pathRoot );
pathRoot = Path::GetPathRoot( fileName );
Console::WriteLine( "GetPathRoot('{0}') returns '{1}'", fileName, pathRoot );
pathRoot = Path::GetPathRoot( fullPath );
Console::WriteLine( "GetPathRoot('{0}') returns '{1}'", fullPath, pathRoot );
// This code produces output similar to the following:
//
// GetPathRoot('\mydir\') returns '\'
// GetPathRoot('myfile.ext') returns ''
// GetPathRoot('C:\mydir\myfile.ext') returns 'C:\'
var path : String = "\\mydir\\";
var fileName : String = "myfile.ext";
var fullPath : String = "C:\\mydir\\myfile.ext";
var pathRoot : String;
pathRoot = Path.GetPathRoot(path);
Console.WriteLine("GetPathRoot('{0}') returns '{1}'",
path, pathRoot);
pathRoot = Path.GetPathRoot(fileName);
Console.WriteLine("GetPathRoot('{0}') returns '{1}'",
fileName, pathRoot);
pathRoot = Path.GetPathRoot(fullPath);
Console.WriteLine("GetPathRoot('{0}') returns '{1}'",
fullPath, pathRoot);
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