SharePoint Dragons

Nikander & Margriet on SharePoint

Add a multivalued taxonomy field to the default view in a custom list thru PowerShell

The title says it all, really. There was one particularly tricky part, where the view needed to be stored in a separate variable, like so:

$view = $myCustomList.DefaultView

Because $myCustomList.DefaultView resulted in the creation of a new View object every time, causing any changes you made to a previous object instance to be lost. The code is here, and it requires you to set up a managed metadata service instance (ours is called Managed Metadata Service), the following blog post can help you with that:

$TestSiteUrl = “http://demosrv/sites/Wilmie”
$Web = Get-SPWeb -identity $TestSiteUrl

#Dev: remove list and create it every time anew
$List = $Web.Lists[“CustList”]

$listTemplate = [Microsoft.SharePoint.SPListTemplateType]::GenericList
$lstId = $Web.Lists.Add(“CustList”,”Cust Descr”,$listTemplate)
write-host “list ” $ListName ” created successfully” $ListName -ForegroundColor Green  

$myCustomList = $Web.Lists[“CustList”]

#Example simple text field (without taxonomy field, this makes testing easier)
#$firstNameColXml = “<Field Type=’Text’ DisplayName=’FirstName’ Required=’TRUE’ MaxLength=’255′ StaticName=’FirstName’ Name=’FirstName’ />”
#$myCustomList.Fields.AddFieldAsXml($firstNameColXml,$true, [Microsoft.SharePoint.SPAddFieldOptions]::AddFieldToDefaultView)  

$taxonomySite = Get-SPSite “http://demosrv:1971″
$taxonomySession = Get-SPTaxonomySession -site $taxonomySite
$termStore = $taxonomySession.TermStores[“Managed Metadata Service”]
write-host “Connection made with term store -“$termStore.Name
$termStoreGroup = $termStore.Groups[“MyTermStoreGroup”];
$termSet = $termStoreGroup.TermSets[“MyTermSet”];

Add-Type -Path ‘C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\ISAPI\Microsoft.SharePoint.Taxonomy.dll’
$taxonomyField = [Microsoft.SharePoint.Taxonomy.TaxonomyField] $myCustomList.Fields.CreateNewField(“TaxonomyFieldTypeMulti”, “Location”)
$taxonomyField.Required = $false
$taxonomyField.StaticName = “my_static_name”
$taxonomyField.SspId = $termStore.Id
$taxonomyField.TermSetId = $termSet.Id
Write-Host “Added field ” $taxonomyField.Title ” to list ” $myCustomList.Title -ForegroundColor Green

$field = $myCustomList.Fields[“Location”];
# PLEASE NOTE: It’s important to store the view in a variable, because calling list.DefaultView results in the creation of a NEW view object every time,
# if you do that, new columns will NEVER be added succesfully to the view.
$view = $myCustomList.DefaultView

Write-Host “Added field ” $field.Title ” to default view” -ForegroundColor Green

Write-Host “Finished set metadata”

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