I'm having trouble with SharePoint CSOM getting child terms using Term object's GetTerms method. In PowerShell using PnP PowerShell I do this:

PS C:\> $term = Get-PnPTerm -Identity "Regions" -TermSet "Location" -TermGroup "Common"
PS C:\> $childTerms = $term.GetTerms(100)
PS C:\> $term.Context.Load($childTerms)
PS C:\> $term.Context.ExecuteQuery()

Exception calling "ExecuteQuery" with "0" argument(s): "Specified argument was out of the range of valid values.
Parameter name: lcid"
At line:1 char:1
+ $term.Context.ExecuteQuery()
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : ServerException

I get the same error when I do this inside ASP.NET MVC application representing remote web in my SharePoint provider-hosted add-in.

  • Are you trying to get all terms inside the TermSet or a Term?
    – Asad Refai
    Nov 9 '17 at 13:28

You can refer the code of PnP GetTerm function @ GitHub you will get better understanding of the command.

Update : Solution to your problem

I am having PnP's October 2017 Intermediate Release 2. They way you load the term object is causing problem. Follow below code it should work.

$term = Get-PnPTerm -Identity "Regions" -TermSet "Location" -TermGroup "Common"
$ctx = $term.Context
$term.Terms ## This should list all child terms
  • I need to get all child terms under particular term in a term set, not all the terms from that term set
    – Rustam
    Nov 9 '17 at 13:46
  • @Rustam once you get all terms, can you not manipulate the terms and retrieve your desired ones.
    – Asad Refai
    Nov 9 '17 at 14:58
  • I'm interested in how to use the API method I asked about.
    – Rustam
    Nov 9 '17 at 16:28
  • @Rustam Check the updated answer, it should work.
    – Asad Refai
    Nov 10 '17 at 5:55
  • 1
    The Terms property only contains child terms directly under the main term. I have a tree structure of child terms and need to get them all recursively
    – Rustam
    Nov 11 '17 at 17:40

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