blocks|key|1406107|text|通常，对于内部命令，PowerShell在启动下一个命令之前会等待。此规则的一个例外是基于EXE的外部Windows子系统。第一个技巧是像这样流水线到Out-Null：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1406108|Notepad.exe+%7C+Out-Null|code-block|syntax|javascript|1406109|PowerShell将等待Notepad.exe进程退出，然后再继续。这很好，但从阅读代码中可以获得一些微妙的信息。您还可以使用带有-Wait参数的Start-Process：|1406110|Start-Process+<path+to+exe>+-NoNewWindow+-Wait|1406111|如果您使用的是PowerShell社区扩展版本，则为：|1406112|$proc+=+Start-Process+<path+to+exe>+-NoNewWindow+-PassThru
$proc.WaitForExit()|1406113|PowerShell+2.0中的另一个选项是使用background+job|1406114|$job+=+Start-Job+{+invoke+command+here+}
Wait-Job+$job
Receive-Job+$job|1406115|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/out-null|1|https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/start-process|2|https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_jobs^0|23|8|23|8|0|0|0|1U|5|22|D|22|D|1|0|0|0|0|O|E|2|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|F|3|G|5|H|7|1E|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1F|8|@$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]]|D|@$9|1K|A|1L|1|1M]]|E|$]]|$1|M|3|N|5|H|7|1N|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1O|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1P|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|1Q|8|@]|D|@$9|1R|A|1S|1|1T]]|E|$]]|$1|U|3|V|5|H|7|1U|8|@]|D|@]|E|$I|J]]|$1|W|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]|14|$5|Z|10|11|E|$12|15]]|16|$5|Z|10|11|E|$12|17]]]]

Normally, for internal commands PowerShell does wait before starting the next command. One exception to this rule is external Windows subsystem based EXE. The first trick is to pipeline to <a href="https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/out-null" rel="noreferrer"><code>Out-Null</code></a> like so:
<pre><code>Notepad.exe | Out-Null
</code></pre>
PowerShell will wait until the Notepad.exe process has been exited before continuing. That is nifty but kind of subtle to pick up from reading the code. You can also use <a href="https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/start-process" rel="noreferrer"><code>Start-Process</code></a> with the <code>-Wait</code> parameter:
<pre><code>Start-Process &lt;path to exe&gt; -NoNewWindow -Wait
</code></pre>
If you are using the PowerShell Community Extensions version it is:
<pre><code>$proc = Start-Process &lt;path to exe&gt; -NoNewWindow -PassThru
$proc.WaitForExit()
</code></pre>
Another option in PowerShell 2.0 is to use a <a href="https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_jobs" rel="noreferrer">background job</a>:
<pre><code>$job = Start-Job { invoke command here }
Wait-Job $job
Receive-Job $job
</code></pre>

blocks|key|1406192|text|除了使用Start-Process+-Wait之外，通过管道传输可执行文件的输出还会让Powershell等待。根据需要，我通常会通过管道连接到Out-Null、Out-Default、Out-String或Out-String+-Stream。Here是一些其他输出选项的长长列表。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1406193|#+Saving+output+as+a+string+to+a+variable.
$output+=+ping.exe+example.com+%7C+Out-String

#+Filtering+the+output.
ping+stackoverflow.com+%7C+where+{+$_+-match+'%5Ereply'+}

#+Using+Start-Process+affords+the+most+control.
Start-Process+-Wait+SomeExecutable.com|code-block|syntax|javascript|1406194|我很怀念您引用的CMD/Bash样式运算符(&，&&，%7C%7C)。看起来我们必须成为more+verbose+with+Powershell。|1406195|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/start-process|1|https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/out-null|2|https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/out-default|3|https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/out-string|4|https://devcentral.f5.com/articles/powershell-abcs-o-is-for-output|5|https://stackoverflow.com/q/2416662/80161^0|4|J|20|8|29|B|2L|A|2W|I|4|J|0|20|8|1|29|B|2|2L|A|3|3F|4|4|0|0|14|S|5|0^^$0|@$1|2|3|4|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]|$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@$9|1F|A|1G|1|1H]|$9|1I|A|1J|1|1K]|$9|1L|A|1M|1|1N]|$9|1O|A|1P|1|1Q]|$9|1R|A|1S|1|1T]]|E|$]]|$1|F|3|G|5|H|7|1U|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1V|8|@]|D|@$9|1W|A|1X|1|1Y]]|E|$]]|$1|M|3|-4|5|6|7|1Z|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]|W|$5|P|Q|R|E|$S|X]]|Y|$5|P|Q|R|E|$S|Z]]|10|$5|P|Q|R|E|$S|11]]|12|$5|P|Q|R|E|$S|13]]]]

Besides using <a href="https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/start-process" rel="nofollow noreferrer"><code>Start-Process -Wait</code></a>, piping the output of an executable will make Powershell wait. Depending on the need, I will typically pipe to <a href="https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/out-null" rel="nofollow noreferrer"><code>Out-Null</code></a>, <a href="https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/out-default" rel="nofollow noreferrer"><code>Out-Default</code></a>, <a href="https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/out-string" rel="nofollow noreferrer"><code>Out-String</code></a> or <code>Out-String -Stream</code>. <a href="https://devcentral.f5.com/articles/powershell-abcs-o-is-for-output" rel="nofollow noreferrer">Here</a> is a long list of some other output options.
<pre><code># Saving output as a string to a variable.
$output = ping.exe example.com | Out-String

# Filtering the output.
ping stackoverflow.com | where { $_ -match '^reply' }

# Using Start-Process affords the most control.
Start-Process -Wait SomeExecutable.com
</code></pre>
I do miss the CMD/Bash style operators that you referenced (&amp;, &amp;&amp;, ||). It
seems we have to be <a href="https://stackoverflow.com/q/2416662/80161">more verbose with Powershell</a>.

blocks|key|1190865|text|如果您使用Start-Process+<path+to+exe>+-NoNewWindow+-Wait|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1190866|您还可以使用-PassThru选项回显输出。|1190867|entityMap^0|5|1A|0|6|9|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

If you use <code>Start-Process &lt;path to exe&gt; -NoNewWindow -Wait</code>

You can also use the <code>-PassThru</code> option to echo output.

blocks|key|1406334|text|一些程序不能很好地处理输出流，使用管道到Out-Null可能不会阻止它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1406335|而且Start-Process需要-ArgumentList开关来传递参数，这就不太方便了。|1406336|还有另一种方法。|1406337|$exitCode+=+[Diagnostics.Process]::Start(<process>,<arguments>).WaitForExit(<timeout>)|code-block|syntax|javascript|1406338|entityMap^0|K|8|0|2|D|H|D|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|Z|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

Some programs can't process output stream very well, using pipe to <code>Out-Null</code> may not block it. 
And <code>Start-Process</code> needs the <code>-ArgumentList</code> switch to pass arguments, not so convenient. 
There is also another approach. 

<pre><code>$exitCode = [Diagnostics.Process]::Start(&lt;process&gt;,&lt;arguments&gt;).WaitForExit(&lt;timeout&gt;)
</code></pre>

blocks|key|1406401|text|只需使用"Wait-process“：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1406402|"notepad","calc","wmplayer"+%7C+ForEach-Object+{Start-Process+$_}+%7C+Wait-Process+;dir|code-block|syntax|javascript|1406403|工作完成了|1406404|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Just use "Wait-process" :

<pre><code>"notepad","calc","wmplayer" | ForEach-Object {Start-Process $_} | Wait-Process ;dir
</code></pre>

job is done

blocks|key|1191049|text|包含选项-NoNewWindow会给我一个错误：Start-Process+:+This+command+cannot+be+executed+due+to+the+error:+Access+is+denied.|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1191050|我能让它工作的唯一方法是调用：|1191051|Start-Process+<path+to+exe>+-Wait|code-block|syntax|javascript|1191052|entityMap^0|4|C|O|2B|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

Including the option <code>-NoNewWindow</code> gives me an error: <code>Start-Process : This command cannot be executed due to the error: Access is denied.</code>

The only way I could get it to work was to call:

<pre><code>Start-Process &lt;path to exe&gt; -Wait
</code></pre>

blocks|key|1191066|text|更进一步，您甚至可以即时解析|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1191067|例如：|1191068|&+"my.exe"+%7C+%25{
++++if+($_+-match+'OK')
++++{+Write-Host+$_+-f+Green+}
++++else+if+($_+-match+'FAIL%7CERROR')
++++{+Write-Host+$_+-f+Red+}
++++else+
++++{+Write-Host+$_+}
}|code-block|syntax|javascript|1191069|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Taking it further you could even parse on the fly

e.g.

<pre><code>&amp; "my.exe" | %{
 if ($_ -match 'OK')
 { Write-Host $_ -f Green }
 else if ($_ -match 'FAIL|ERROR')
 { Write-Host $_ -f Red }
 else 
 { Write-Host $_ }
}
</code></pre>

blocks|key|1191134|text|总是有cmd的。如果您在引用start-process的参数时遇到问题，可能不会那么烦人：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1191135|cmd+/c+start+/wait+notepad|code-block|syntax|javascript|1191136|或|1191137|notepad+%7C+out-host|1191138|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

There's always cmd. It may be less annoying if you have trouble quoting arguments to start-process:
<pre><code>cmd /c start /wait notepad
</code></pre>
Or
<pre><code>notepad | out-host
</code></pre>

I have a PowerShell 1.0 script to just open a bunch of applications. The first is a virtual machine and the others are development applications. I want the virtual machine to finish booting before the rest of the applications are opened.

In bash I could just say <code>"cmd1 &amp;&amp; cmd2"</code>

This is what I've got...

<pre><code>C:\Applications\VirtualBox\vboxmanage startvm superdooper
 &amp;"C:\Applications\NetBeans 6.5\bin\netbeans.exe"
</code></pre>

How to tell PowerShell to wait for each command to end before starting the next?

虚拟机

Windows

我有一个PowerShell 1.0脚本来打开一堆应用程序。第一个是虚拟机，其他是开发应用程序。我希望虚拟机在其他应用程序打开之前完成引导。在狂欢中我只能说"cmd1 && cmd2"这就是我得到的..。C:\Applications\VirtualBox\vboxmanage startvm superdooper ...

问如何告诉PowerShell在开始下一个命令之前等待每个命令结束？
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问如何告诉PowerShell在开始下一个命令之前等待每个命令结束？
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