Powershell Script to Enable and Disable SharePoint list versioning

Question

Hi,
We have a Sharepoint list with a date and time field named 'Today' which we update overnight
via PowerShell script to give the current date and this recalculates other calculated fields
in the list.
All is fine but we have versioning enabled on the list and so we get a new version created everyday.
Is there a way to disable the versioning prior to running the update and then re-enable
after?
This is the script
Add-PSSnapin Microsoft.SharePoint.PowerShell
Start-SPAssignment -Global
$SPWeb = Get-SPWeb "<SharePointSiteUrl>"
$List = $SPWeb.Lists["ListName"]
$Items = $List.Items
foreach ($item in $items)
 $modifiedBy = $item["Editor"]
 $modified = $item["Modified"]
 $item["Today"] = Get-Date
 $item["Editor"] = $modifiedBy
 $item["Modified"] = $modified
 $item.Update()
 $list.Update()
$SPWeb.Dispose()
Stop-SPAssignment -Global  

Answer 1

Hi
Here is a quick powershell script to iterate a site collection and remove versioning on all list of base-type Document Library. Also the iteration removes all the current versions of list items. Great for freeing up space and also to make publishing sites
a little more easy to manage content for trusted content approvers!
Check the below powershell script
[void][System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
# Get site
$site = new-object Microsoft.SharePoint.SPSite("http://YoServer:1002")
# Iterate all the webs of the site
foreach ($web in $site.AllWebs)
# loop through all lists in web
foreach ($list in $web.Lists)
# Ensure list is of base Document Library
if ($list.BaseType -ne "DocumentLibrary")
# Move on
continue
# Loop through each item
foreach ($item in $list.Items)
# Get the file
$file = $item.File
# Delete all versions
$file.Versions.DeleteAll()
# Remove version from the list
$list.EnableVersioning = $false
$list.EnableModeration = $false
# We still want to ensure check out
$list.ForceCheckout = $true
$list.Update()
$web.Dispose();
$site.Dispose();
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