How to determine if a website is installed in IIS7 with Powershell?

Question

I'm pretty new to powershell, and I'm trying to automate the removal of a prior version of a website and addition of the newer version as a part of a TFS 2010 Build Template (Windows Workflow 4.0). Is it possible to see if a website or web app pool exists in IIS7 with powershell? I've tried running the following command:

import-module WebAdministration
Get-Website -Name "Default Web Site"

The output lists all of the websites installed on the box, not just the default web site.

Name             ID   State      Physical Path                  Bindings
-------------------------------------------------------------------------
Default Web Site 1    Started    %SystemDrive%\inetpub\wwwroot  http *:80:
                                                                net.tcp 808:*
                                                                net.pipe *
                                                                net.msmq localhost
                                                                msmq.formatname localhost 
MyWebsite1       2    Started    C:\inetpub\MyWebsite1          http *:80:mywebsite1.com
MyWebsite2       3    Started    C:\inetpub\MyWebsite2          http *:80:mywebsite2.com

If I try to run the command without the "-Name" parameter, the result is exactly the same.

Answer 1

You can use Test-Path for both checking web sites & application pools:

Import-Module webadministration
$alias = "MyWebSite1"
$IISPath = "IIS:\Sites\Default Web Site\$alias"

if (Test-Path $IISPath) { Write-Host "$alias exists." }

$IISPath = "IIS:\AppPools"
cd $IISPath
if (Test-Path ".\MyAppPool") { Write-Host "MyAppPool exists." }