Requirement: Copy Attachment from one list to another in SharePoint Online.
PowerShell to Copy Attachment to Another List in SharePoint Online:
Had a requirement to copy attachments between SharePoint Online lists. (only attachment - Not list items!). This script gets the attachments from source list, searches the matching list item based on "Mapping Column" value and attaches list attachments to the destination list items.
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PowerShell to Copy Attachment to Another List in SharePoint Online:
Had a requirement to copy attachments between SharePoint Online lists. (only attachment - Not list items!). This script gets the attachments from source list, searches the matching list item based on "Mapping Column" value and attaches list attachments to the destination list items.
#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
Function Copy-Attachments()
{
param
(
[Parameter(Mandatory=$true)] [string] $SiteURL,
[Parameter(Mandatory=$true)] [string] $SourceListName,
[Parameter(Mandatory=$true)] [string] $TargetListName,
[Parameter(Mandatory=$false)] [string] $MappingColumn="Title"
)
Try {
#Setup Credentials to connect
$Cred = Get-Credential
$Cred = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.UserName,$Cred.Password)
#Setup the context
$Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
$Ctx.Credentials = $Cred
#Get the Source List & Target Lists
$SourceList = $Ctx.Web.Lists.GetByTitle($SourceListName)
$TargetList = $Ctx.Web.Lists.GetByTitle($TargetListName)
#Get All Items
$SourceListItems = $SourceList.GetItems([Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery())
$TargetListItems = $TargetList.GetItems([Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery())
$Ctx.Load($SourceListItems)
$Ctx.Load($TargetListItems)
$Ctx.ExecuteQuery()
#Iterate through each list item from source
ForEach($SourceItem in $SourceListItems)
{
#Get All attachments from the List Item
$AttachmentsColl = $SourceItem.AttachmentFiles
$Ctx.Load($AttachmentsColl)
$Ctx.ExecuteQuery()
#Get Matching List item in the target list
$ListItem = $TargetListItems | Where { $_[$MappingColumn] -eq $SourceItem[$MappingColumn]}
if($ListItem -ne $null)
{
#Get attachment for each list item
ForEach($Attachment in $AttachmentsColl)
{
$AttachmentCreation = New-Object Microsoft.SharePoint.Client.AttachmentCreationInformation
#Get the Source attachment
$FileContent = [Microsoft.SharePoint.Client.File]::OpenBinaryDirect($Ctx, $Attachment.ServerRelativeUrl)
$Buffer = New-Object byte[]($FileContent.length)
$BytesRead = $FileContent.stream.Read($Buffer, 0, $Buffer.Length)
$ContentStream = New-Object -TypeName System.IO.MemoryStream ($Buffer)
$AttachmentCreation.ContentStream = $ContentStream
$AttachmentCreation.FileName = $Attachment.FileName
[void]$ListItem.AttachmentFiles.Add($AttachmentCreation)
$Ctx.ExecuteQuery()
}
}
}
write-host -f Green "List Attachments Copied from '$SourceListName' to '$TargetListName' !"
}
Catch {
write-host -f Red "Error Copying List Attachments!" $_.Exception.Message
}
}
#Set Parameters
$SiteURL= "https://crescent.sharepoint.com/"
$SourceListName="Projects"
$TargetListName="Project Temp"
#Call the function to copy list items
Copy-Attachments -siteURL $SiteURL -SourceListName $SourceListName -TargetListName $TargetListName
