I had to migrate data from ListA to ListB with the condition that values in Created By, Create Date, Updated By and Update Date columns must not be changed in ListB.
So I wrote this little PowerShell script to do the job.
Solution:
cls;
[void][reflection.assembly]::Loadwithpartialname("Microsoft.SharePoint")
$Site=[Microsoft.SharePoint.SPSite]("http://sharepoint01:1100")
$SiteWeb = $Site.openWeb()
$SourceList = $SiteWeb.Lists["ListA"]
$DestinationList = $SiteWeb.Lists["ListB"]
$ItemsColl = $SourceList.items
write-host "Total items found: " $SourceList.items.count
foreach ($Item in $ItemsColl)
{
write-host "Copying Item: " $Item["Title"]
$NewItem = $DestinationList.items.Add()
$NewItem["Title"] = $Item["Title"]
$NewItem["Author"] = $Item["Author"]
$NewItem["Editor"] = $Item["Editor"]
$NewItem["Modified"] = $Item["Modified"]
$NewItem["Created"] = $Item["Created"]
$NewItem.Update()
}
$Web.dispose
$Site.dispose
write-host "All items have been copied successfully."
