Removing path and extension from filename in power

问题:

I have a series of strings which are full paths to files. I'd like to save just the filename, without the file extension and the leading path. So from this:

c:\temp\myfile.txt

to

myfile

I'm not actually iterating through a directory, in which case something like powershell's basename property could be used, but rather I'm dealing with strings alone.

回答1:

There's a handy .NET method for that:

C:\PS> [io.path]::GetFileNameWithoutExtension("c:\temp\myfile.txt")
myfile

回答2:

Way easier than I thought to address the issue of displaying the full path, directory, file name or file extension.

$PSCommandPath
(Get-Item $PSCommandPath ).Extension
(Get-Item $PSCommandPath ).Basename
(Get-Item $PSCommandPath ).Name
(Get-Item $PSCommandPath ).DirectoryName
(Get-Item $PSCommandPath ).FullName
$ConfigINI = (Get-Item $PSCommandPath ).DirectoryName+"\"+(Get-Item $PSCommandPath ).BaseName+".ini"
$ConfigINI

other forms:

$scriptPath = split-path -parent $MyInvocationMyCommand.Definition
split-path -parent $PSCommandPath
Split-Path $script:MyInvocation.MyCommand.Path
split-path -parent $MyInvocation.MyCommand.Definition
[io.path]::GetFileNameWithoutExtension($MyInvocation.MyCommand.Name)

回答3:

or

([io.fileinfo]"c:\temp\myfile.txt").basename

or

"c:\temp\myfile.txt".split('\.')[-2]

回答4:

Inspired by an answer of @walid2mi:

(Get-Item 'c:\temp\myfile.txt').Basename

Please note: this only works if the given file really exists.

回答5:

you can use basename property

PS II> ls *.ps1 | select basename

回答6:

@Keith,

here another option:

PS II> $f="C:\Downloads\ReSharperSetup.7.0.97.60.msi"

PS II> $f.split('\')[-1] -replace '\.\w+$'

PS II> $f.Substring(0,$f.LastIndexOf('.')).split('\')[-1]

回答7:

Given any arbitrary path string, various static methods on the System.IO.Path object give the following results.

strTestPath                 = C:\Users\DAG\Documents\Articles_2018\NTFS_File_Times_in_CMD\PathStringInfo.ps1
GetDirectoryName            = C:\Users\DAG\Documents\Articles_2018\NTFS_File_Times_in_CMD
GetFileName                 = PathStringInfo.ps1
GetExtension                = .ps1
GetFileNameWithoutExtension = PathStringInfo

Following is the code that generated the above output.

[console]::Writeline( "strTestPath                 = {0}{1}" ,
                      $strTestPath , [Environment]::NewLine );
[console]::Writeline( "GetDirectoryName            = {0}" ,
                      [IO.Path]::GetDirectoryName( $strTestPath ) );
[console]::Writeline( "GetFileName                 = {0}" ,
                      [IO.Path]::GetFileName( $strTestPath ) );
[console]::Writeline( "GetExtension                = {0}" ,
                      [IO.Path]::GetExtension( $strTestPath ) );
[console]::Writeline( "GetFileNameWithoutExtension = {0}" ,
                      [IO.Path]::GetFileNameWithoutExtension( $strTestPath ) );

Writing and testing the script that generated the above uncovered some quirks about how PowerShell differs from C#, C, C++, the Windows NT command scripting language, and just about everything else with which I have any experience.

回答8:

Here is one without parentheses

[io.fileinfo] 'c:\temp\myfile.txt' | % basename

回答9:

This can be done by splitting the string a couple of times.

#Path
$Link = "http://some.url/some/path/file.name"

#Split path on "/"
#Results of split will look like this : 
# http:
#
# some.url
# some
# path
# file.name
$Split = $Link.Split("/")

#Count how many Split strings there are
#There are 6 strings that have been split in my example
$SplitCount = $Split.Count

#Select the last string
#Result of this selection : 
# file.name
$FilenameWithExtension = $Split[$SplitCount -1]

#Split filename on "."
#Result of this split : 
# file
# name
$FilenameWithExtensionSplit = $FilenameWithExtension.Split(".")

#Select the first half
#Result of this selection : 
# file
$FilenameWithoutExtension = $FilenameWithExtensionSplit[0]

#The filename without extension is in this variable now
# file
$FilenameWithoutExtension

Here is the code without comments :

$Link = "http://some.url/some/path/file.name"
$Split = $Link.Split("/")
$SplitCount = $Split.Count
$FilenameWithExtension = $Split[$SplitCount -1]
$FilenameWithExtensionSplit = $FilenameWithExtension.Split(".")
$FilenameWithoutExtension = $FilenameWithExtensionSplit[0]
$FilenameWithoutExtension