Sharepoint: How to determine if user is member of group through API

Question

I need know if some(not only current) user is member of some group.

Moreover, I need know if user placed inside domain group, which placed in sharepoint group. For example:

Group 'GroupA' contains user 'XXX\Domain Users'. I have user 'XXX\someuser' from domain XXX and need to know if this is member of 'GroupA'. In this example it is true.

For now I found only one way:

Impersonate as specified user and check web.SiteGroups['GroupA'].ContainsCurrentUser

But it is look like hack.

Christian · Answer 1 · 2010-12-10T07:21:01.033

0

Should be the same as in .NET:

principal.IsInRole('GROUPNAME')

Or you can try to do following:

WindowsIdentity identity = WindowsIdentity.GetCurrent();
WindowsPrincipal principal = new WindowsPrincipal(identity);
if( principal.IsInRole(@"MYCOMPANY\AllFTE") ){
  // perform operation allowed for fulltime employees
}

Maybe that post helps you out: http://mnigbor.blogspot.com/2010/05/using-windowsidentityimpersonate-in.html

edited Dec 10 '10 at 07:21

answered Dec 09 '10 at 15:34

Christian

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SPUser doesn't have this method(or any like). What is the type of principal ? – Sergey Azarkevich Dec 09 '10 at 15:40
The type would be IPrincipal. Have you seen the Property Groups in the SPUser Class? Maybe this helps you out? – Christian Dec 09 '10 at 16:08
Property user.Groups contains only sharepoint groups and not contains special groups from windows domain like 'XXX\Domain Users'. :( – Sergey Azarkevich Dec 10 '10 at 07:12
Edited the answer. Have a look. – Christian Dec 10 '10 at 07:21

Sharepoint: How to determine if user is member of group through API

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