How to update Column value in a list using powershell.

Question

Hi All,
I am trying to copy value of One column to another column in same list. I am using SPSiteDataQuery for this. I am using following power shell script.
if ((Get-PSSnapin -Name Microsoft.SharePoint.Powershell -ErrorAction SilentlyContinue) -eq $null )
    Add-PSSnapin Microsoft.SharePoint.Powershell
 $CopyFromColumnName1 = "Section-1 Summary" #column copy source 1
 $CopyToColumnName1 = "RichTextBoxControl"  #destination column 1
$siteCollectionUrl = http://someURL
$site =new-object Microsoft.SharePoint.SPSite($siteCollectionUrl)
$query = new-object Microsoft.SharePoint.SPSiteDataQuery
$query.ViewFields = "<FieldRef Name='Title' /><FieldRef Name='PublishingPageLayout' /><FieldRef Name='FileLeafRef' /><FieldRef Name='RTC' /><FieldRef Name='SummaryOne' />";
$query.Webs = "<Webs Scope='SiteCollection'>"
$query.Lists = "<Lists ServerTemplate='850'/>"
$query.Query = "<Where>
                    <Contains>
                        <FieldRef Name='PublishingPageLayout' />
                        <Value Type='URL'>SomePageLayout</Value>
                    </Contains>
                </Where>"
$spListItems = $site.rootweb.GetSiteData($query)
#Write-Host $spListItems
foreach($row in $spListItems.Rows)
  $row.RTC = $row.SummaryOne
  write-Host $row.RTC
  $childWeb.Dispose()
$site.Dispose()
Here the column RTC is not updating on executing the script. I want to copy data from "SummaryOne" to "RTC" column.
Please assist me with this issue.
amol

Answer 1

Hi Bruno,
Thanks for reply I use following script and it is working for me.
if ((Get-PSSnapin
-Name Microsoft.SharePoint.Powershell
-ErrorAction SilentlyContinue)
-eq $null )
Add-PSSnapin
Microsoft.SharePoint.Powershell
#Use the Display Names
$webApplicationURL
= Read-Host
'Provide Site collection/Contnt HUB URL'
$webApp
= Get-SPWebApplication
$webApplicationURL
$CopyFromColumnName1
= "colName"
#column copy source 1
$CopyToColumnName1
= "coltoCopyVal" 
#destination column 1
if($webApp
-ne $null)
foreach($siteCollectionUrl
in $webApp.Sites)
$site =new-object
Microsoft.SharePoint.SPSite($siteCollectionUrl.Url)
$query =
new-object Microsoft.SharePoint.SPSiteDataQuery
$query.ViewFields
= "<FieldRef Name='Title' /><FieldRef Name='PublishingPageLayout' /><FieldRef Name='FileLeafRef' /><FieldRef Name='RTC' /><FieldRef Name=’Name’ />";
$query.Webs
= "<Webs Scope='SiteCollection'>"
$query.Lists
= "<Lists ServerTemplate='850'/>"
$query.Query
= "<Where>
<Contains>
       <FieldRef Name='PublishingPageLayout' />
<Value Type='URL'>PageLayout</Value>
</Contains>
</Where>"
$spListItems
= $site.rootweb.GetSiteData($query)
#Write-Host $spListItems
foreach($row
in $spListItems.Rows)
$listId
= $row["ListId"]
$webId =
$row["WebId"]
$childWeb
= $site.OpenWeb([GUID]($webId))
$pagesList
= $childWeb.Lists[[GUID]($listId)];
$itemUrl
= $childWeb.Url
+ "/"
+ $pagesList.RootFolder.Url
+ "/"
+ $row['FileLeafRef'].Split(';#')[2]
$listItme
= $pagesList.GetItemById($row.ID)
$listItme['RTC']
= $listItme[Name']
[Microsoft.SharePoint.SPSecurity]::RunWithElevatedPrivileges({
$listItme.SystemUpdate()
$childWeb.Dispose()
$site.Dispose()
else
Echo $webApplicationURL
"does not exist, check the WebApplication name"
Regards
Amol
amol