Path.IsPathRooted Method (String)


Gets a value indicating whether the specified path string contains a root.

Namespace:   System.IO
Assembly:  mscorlib (in mscorlib.dll)

Public Shared Function IsPathRooted (
	path As String
) As Boolean


Type: System.String

The path to test.

Return Value

Type: System.Boolean

true if path contains a root; otherwise, false.

Exception Condition

path contains one or more of the invalid characters defined in GetInvalidPathChars.

The IsPathRooted method returns true if the first character is a directory separator character such as "\", or if the path starts with a drive letter and colon (:). For example, it returns true for path strings such as "\\MyDir\\MyFile.txt", "C:\\MyDir", or "C:MyDir". It returns false for path strings such as "MyDir".

This method does not verify that the path or file name exists.

For a list of common I/O tasks, see Common I/O Tasks.

The following code example demonstrates how the IsPathRooted method can be used to test three strings.

Dim fileName As String = "C:\mydir\myfile.ext"
Dim UncPath As String = "\\myPc\mydir\myfile"
Dim relativePath As String = "mydir\sudir\"
Dim result As Boolean

result = Path.IsPathRooted(fileName)
Console.WriteLine("IsPathRooted('{0}') returns {1}", fileName, result)

result = Path.IsPathRooted(UncPath)
Console.WriteLine("IsPathRooted('{0}') returns {1}", UncPath, result)

result = Path.IsPathRooted(relativePath)
Console.WriteLine("IsPathRooted('{0}') returns {1}", relativePath, result)

' This code produces output similar to the following:
' IsPathRooted('C:\mydir\myfile.ext') returns True
' IsPathRooted('\\myPc\mydir\myfile') returns True
' IsPathRooted('mydir\sudir\') returns False

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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