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Comment exécuter a PowerShell script

ayi

How do I run a PowerShell script?
<ul>
<li>
I have a script named myscript.ps1
</li>
<li>
I have all the necessary frameworks installed
</li>
<li>
I set that <a href="https://stackoverflow.com/questions/10635/why-dont-my-powershell-scripts-run" rel="noopener nofollow ugc">execution policy</a> thing
</li>
<li>
I have followed the instructions on <a href="http://technet.microsoft.com/en-us/library/ee176949.aspx" rel="noopener nofollow ugc">this MSDN help page</a> 
and am trying to run it like so: 
<code>powershell.exe 'C:\my_path\yada_yada\run_import_script.ps1'</code> (with or without <code>--noexit</code>)
</li>
</ul>
which returns exactly nothing, except that the file name is output.
No error, no message, nothing. Oh, when I add <code>-noexit</code>, the same thing happens, but I remain within PowerShell and have to exit manually.
The .ps1 file is supposed to run a program and return the error level dependent on that program’s output. But I’m quite sure I’m not even getting there yet.
What am I doing wrong?
<hr>
Source : <a href="https://stackoverflow.com/questions/10635/why-dont-my-powershell-scripts-run" rel="noopener nofollow ugc">Stack Overflow</a>

ayi_2

Prerequis :
<ul>
<li>
You need to be able to run PowerShell as an administrator
</li>
<li>
You need to set your PowerShell execution policy to a permissive value or be able to bypass it
</li>
</ul>
Etapes :
<ul>
<li></li>
</ul>
Launch Windows PowerShell as an Administrator, and wait for the <code>PS></code> prompt to appear
<ul>
<li></li>
</ul>
Navigate within PowerShell to the directory where the script lives:
<pre><code class="lang-auto">PS> cd C:\my_path\yada_yada\ (enter)

</code></pre>
<ul>
<li></li>
</ul>
Execute the script:
<pre><code class="lang-auto">PS> .\run_import_script.ps1 (enter)

</code></pre>
Or: you can run the PowerShell script from the Command Prompt (<code>cmd.exe</code>) like this:
<pre><code class="lang-auto">powershell -noexit "& ""C:\my_path\yada_yada\run_import_script.ps1""" (enter)

</code></pre>
according to <a href="http://poshoholic.com/2007/09/27/invoking-a-powershell-script-from-cmdexe-or-start-run/">Invoking a PowerShell script from cmd.exe (or Start | Run)</a> by Kirk Munro.
Or you could even <a href="http://www.codeproject.com/KB/threads/AsyncPowerShell.aspx">run your PowerShell script asynchronously from your C# application</a>.