Import From CSV File into SharePoint List using Powershell

Periodically, We needed the data from a CSV file, which is generated by an external Third-party application, to be imported to SharePoint 2010 List. To fulfill this requirement,  I wrote a quick PowerShell script which will read the CSV file and import the data into the SharePoint list using PowerShell.

PowerShell Script to import from CSV file to SharePoint 2010 list
Lets import CSV file to SharePoint list using PowerShell

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

#Read the CSV file
$CSVData = Import-CSV -path "C:\Data.csv"

#If the CSV Doesn't has column Headers, you can create Named Headers
$CSVData = Import-CSV -path "C:\Data.csv" -Header("Title", "Description", "Priority", "AssignedTo", "DueDate", "Status")

#Get the Web
$web = Get-SPWeb -identity "http://sharepoint.crescent.com/sites/Marketing/"

#Get the Target List
$list = $web.Lists["Log"]

#Iterate through each Row in the CSV
foreach ($row in $CSVData) 
 {
   $item = $list.Items.Add();
   
   $item["Title"] = $row.Title
   $item["Description"] = $row.Description
   $item["Priority"] = $row.Priority

   #Set the People Picker Field value
   $item["Assigned To"] = Get-SPUser -Identity $row.AssignedTo -web "http://sharepoint.crescent.com/sites/Marketing/"
    
   #Set the Date Field value
   $item["Due Date"] = Get-Date $row.DueDate

   $item["Status"] = $row.Status
   $item.Update()
 }

We scheduled this script through Windows Task Scheduler: How to schedule a PowerShell script using windows task scheduler

In another case, before importing a list item from the CSV file, I had to check whether the item which is being added, already exists in the List. If It doesn't exist, let the script add a new item from CSV file.

$ListItems = $reconciliationList.Items | Where-Object { $_.Item("Title") -eq $row.Title}

  if ($ListItems -eq $null)
    { 
      #ADD Item to the List
    }

Update Lookup values in PowerShell:
Unlike other fields, SharePoint lookup fields can't be set directly. We have to get the lookup parent id, to update the lookup field values.

   
 #For Lookup values: Lookup Parent List
 $DepartmentList=$web.Lists["Department"]

 #Get the Lookup Item from Parent List
 $LookupItem = $departmentList.Items | Where-Object { $_.Item("Title") -eq $row.Department}

 if($LookupItem -ne $null)
 {
     $deptLookup = New-Object Microsoft.Sharepoint.SPFieldLookupValue($LookupItem.ID,$row.Department)
 }

 #Set the Lookup field value
 $item["Department"] = $deptLookup
   
 $item.Update()