blocks|key|479145|text|我发现了一些内置的东西，Resolve-Path|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|479146|Resolve-Path+-Relative|code-block|syntax|javascript|479147|这将返回相对于当前位置的路径。一个简单的用法：|479148|$root+=+"C:\Users\Dave\"
$current+=+"C:\Users\Dave\Documents\"
$tmp+=+Get-Location
Set-Location+$root
Resolve-Path+-relative+$current
Set-Location+$tmp|479149|entityMap|0|LINK|mutability|MUTABLE|url|https://technet.microsoft.com/en-us/library/hh849858.aspx^0|C|C|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

I found something built in, <a href="https://technet.microsoft.com/en-us/library/hh849858.aspx" rel="noreferrer">Resolve-Path</a>:

<pre><code>Resolve-Path -Relative
</code></pre>

This returns the path relative to the current location. A simple usage:

<pre><code>$root = "C:\Users\Dave\"
$current = "C:\Users\Dave\Documents\"
$tmp = Get-Location
Set-Location $root
Resolve-Path -relative $current
Set-Location $tmp
</code></pre>

blocks|key|262548|text|以下是另一种方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|262549|$pathToConvert1+=+"c:\documents\mynicefiles\afile.txt"
$referencePath1+=+"c:\documents"
$result1+=+$pathToConvert1.Substring($referencePath1.Length+%2B+1)
#$result1:++mynicefiles\afile.txt|code-block|syntax|javascript|262550|和|262551|$pathToConvert2+=+"c:\documents\myproject1\afile.txt"
#$referencePath2+=+"c:\documents\myproject2"
$result2+=+"..\myproject"+%2B+[regex]::Replace($pathToConvert2+,+".*\d%2B",+'')
#$result2:++++++++++..\myproject\afile.txt|262552|注意:在第二种情况下，没有使用ref+path。|262553|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Here is an alternative approach

<pre><code>$pathToConvert1 = "c:\documents\mynicefiles\afile.txt"
$referencePath1 = "c:\documents"
$result1 = $pathToConvert1.Substring($referencePath1.Length + 1)
#$result1: mynicefiles\afile.txt
</code></pre>

 And

<pre><code>$pathToConvert2 = "c:\documents\myproject1\afile.txt"
#$referencePath2 = "c:\documents\myproject2"
$result2 = "..\myproject" + [regex]::Replace($pathToConvert2 , ".*\d+", '')
#$result2: ..\myproject\afile.txt
</code></pre>

Note: in the second case ref path wasn't used.

blocks|key|262603|text|一种快速而简单的方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|262604|$current+-replace+[regex]::Escape($root),+'.'|code-block|syntax|javascript|262605|或者，如果您想要实际当前位置的相对路径|262606|$path+-replace+[regex]::Escape((pwd).Path),+'.'|262607|这假设您的所有路径都是有效的。|262608|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

A quick and easy way would be :

<pre><code>$current -replace [regex]::Escape($root), '.'
</code></pre>

Or if you want the relative path from your actual current location

<pre><code>$path -replace [regex]::Escape((pwd).Path), '.'
</code></pre>

This assumes all your paths are valid.

blocks|key|479283|text|有一个很好的答案是here，但它会更改您的当前目录(它会恢复)，但如果您确实需要隔离该进程，下面的代码示例可能会有所帮助。它做同样的事情，只是在一个新的PowerShell实例中。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|479284|function+Get-RelativePath($path,+$relativeTo)+{
++++$powershell+=+(Get-Process+-PID+$PID+%7C+Get-Item)
++++if+([string]::IsNullOrEmpty($powershell))+{
++++++++$powershell+=+"powershell.exe"
++++}

++++&+$powershell+-NoProfile+-NonInteractive+-ExecutionPolicy+Unrestricted+-Command+"&+{+Set-Location+`"$relativeTo`";+Resolve-Path+`"$path`"+-Relative}"
}|code-block|syntax|javascript|479285|它真的很慢，你应该使用其他版本，除非你一定要使用这个版本。|479286|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/12396272/438570^0|9|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

There is a good answer <a href="https://stackoverflow.com/a/12396272/438570">here</a>, but it changes your current directory (it reverts back), but if you really need to isolate that process, code example below can help. It does the same thing, just in a new PowerShell instance.
<pre><code>function Get-RelativePath($path, $relativeTo) {
 $powershell = (Get-Process -PID $PID | Get-Item)
 if ([string]::IsNullOrEmpty($powershell)) {
 $powershell = &quot;powershell.exe&quot;
 }

 &amp; $powershell -NoProfile -NonInteractive -ExecutionPolicy Unrestricted -Command &quot;&amp; { Set-Location `&quot;$relativeTo`&quot;; Resolve-Path `&quot;$path`&quot; -Relative}&quot;
}
</code></pre>
It's really slow though, you should really use the other version unless you absolutely have to use this.

blocks|key|479319|text|使用内置System.IO.Path.GetRelativePath比公认的答案更简单：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|479320|[System.IO.Path]::GetRelativePath($relativeTo,+$path)|code-block|syntax|javascript|479321|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.io.path.getrelativepath^0|4|U|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Using the built-in <a href="https://docs.microsoft.com/en-us/dotnet/api/system.io.path.getrelativepath" rel="noreferrer">System.IO.Path.GetRelativePath</a> is simpler than the accepted answer:
<pre><code>[System.IO.Path]::GetRelativePath($relativeTo, $path)
</code></pre>

blocks|key|262834|text|有时我有多个“根”，我想从它们生成相对文件路径。我发现Resolve-Path+-Relative在这种情况下无法使用。更改全局设置、当前位置以生成相对文件路径似乎很容易出错，而且(如果您正在编写并行代码)可能不是线程安全的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|262835|下面的代码应该可以在早期或最近版本的Powershell和Powershell+Core中运行，不会更改您的当前目录，即使是临时的，而且是独立于操作系统和线程安全的。|262836|它没有解决OP中的第二个示例(根据需要插入..+)。|262837|function+Get-RelativePath+{
++++param($path,+$relativeTo)
++++#+strip+trailing+slash
++++$relativeTo+=+Join-Path+`
++++++++++++++++++++++(Split-Path+-Parent+$relativeTo)+`
++++++++++++++++++++++(Split-Path+-Leaf+$relativeTo)
++++$relPath+=+Split-Path+-Leaf+$path
++++$path+=+Split-Path+-Parent+$path
++++do+{++++
++++++++$leaf+=+Split-Path+-Leaf+$path
++++++++$relPath+=+Join-Path+$leaf+$relPath
++++++++$path+=+Split-Path+-Parent+$path
++++}+until+(($path+-eq+$relativeTo)+-Or+($path.Length+-eq+0))
++++$relPath
}|code-block|syntax|javascript|262838|举个例子：|262839|PS>+$configRoot+=+'C:\Users\P799634t\code\RMP\v2\AWD'
PS>+$queryPath+=+'C:\Users\P799634t\code\RMP\v2\AWD\config_queries\LOAD_UNQ_QUEUE_QUERY2.sql'
PS>+Write-Host+(Get-RelativePath+$queryPath+$configRoot)
config_queries\LOAD_UNQ_QUEUE_QUERY2.sql|262840|当一个文件路径不是另一个文件路径的子路径时，它的行为是合理的：|262841|PS>+$root+=+'C:\Users\P799634t\code\RMP\v2\AWD'
PS>+$notRelated+=+'E:\path\to\origami'
PS>+Write-Host+(Get-RelativePath+$notRelated+$root)
E:\path\to\origami|262842|entityMap^0|R|M|0|0|L|2|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|15|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|16|8|@]|D|@]|E|$]]|$1|Q|3|R|5|L|7|17|8|@]|D|@]|E|$M|N]]|$1|S|3|T|5|6|7|18|8|@]|D|@]|E|$]]|$1|U|3|V|5|L|7|19|8|@]|D|@]|E|$M|N]]|$1|W|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|X|$]]

Sometimes I have multiple &quot;roots&quot; from which I want to generate relative file paths. I have found <code>Resolve-Path -Relative</code> unusable in this kind of situation. Changing a global setting, current location, in order to generate a relative file path seems error-prone and (if you're writing parallel code) possibly not thread-safe.
The following should work in early or recent versions of Powershell and Powershell Core, doesn't change your current directory, even temporarily, and is OS-independent and thread-safe.
It doesn't address the second example from OP (inserting <code>..</code> as required.)
<pre><code>function Get-RelativePath {
 param($path, $relativeTo)
 # strip trailing slash
 $relativeTo = Join-Path `
 (Split-Path -Parent $relativeTo) `
 (Split-Path -Leaf $relativeTo)
 $relPath = Split-Path -Leaf $path
 $path = Split-Path -Parent $path
 do { 
 $leaf = Split-Path -Leaf $path
 $relPath = Join-Path $leaf $relPath
 $path = Split-Path -Parent $path
 } until (($path -eq $relativeTo) -Or ($path.Length -eq 0))
 $relPath
}
</code></pre>
An example:
<pre><code>PS&gt; $configRoot = 'C:\Users\P799634t\code\RMP\v2\AWD'
PS&gt; $queryPath = 'C:\Users\P799634t\code\RMP\v2\AWD\config_queries\LOAD_UNQ_QUEUE_QUERY2.sql'
PS&gt; Write-Host (Get-RelativePath $queryPath $configRoot)
config_queries\LOAD_UNQ_QUEUE_QUERY2.sql
</code></pre>
It behaves reasonably when one file path is not a sub-path of the other:
<pre><code>PS&gt; $root = 'C:\Users\P799634t\code\RMP\v2\AWD'
PS&gt; $notRelated = 'E:\path\to\origami'
PS&gt; Write-Host (Get-RelativePath $notRelated $root)
E:\path\to\origami
</code></pre>

I'd like to convert a path to a relative path in a PowerShell script.
How do I do this using PowerShell?

For example:

<pre><code>Path to convert: c:\documents\mynicefiles\afile.txt
Reference path: c:\documents
Result: mynicefiles\afile.txt
</code></pre>

And

<pre><code>Path to convert: c:\documents\myproject1\afile.txt
Reference path: c:\documents\myproject2
Result: ..\myproject1\afile.txt
</code></pre>

How to convert absolute path to relative path in PowerShell?

我想在PowerShell脚本中将路径转换为相对路径。如何使用PowerShell完成此操作？例如：Path to convert: c:\documents\mynicefiles\afile.txtReference path:  c:\documentsResult:          mynicefiles\a...

问如何在PowerShell中将绝对路径转换为相对路径？
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问如何在PowerShell中将绝对路径转换为相对路径？
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