How to check if Group on sub site exists CSOM

Question

I want to copy a SharePoint Permissions Groups to subsites that does not have that group already. The permissions inheritance is broken.

Lets say we have the following site structure:

https://x.sharepoint.com/SubsiteLevel1/
https://x.sharepoint.com/SubsiteLevel1/SubsiteLevel2/

How would I go about getting the site specific Groups that are used on SubsiteLevel2 (or any site). The problem I am facing is that when I get the Groups from a site I can only get the SiteGroups. So all groups on the Site Collection.

GroupCollection groupCollection = web.SiteGroups;

How can I get the specific groups that are used on a sub site?

Answer 1

You can get it via the RoleAssignmentCollection.Groups property.

Check the below code:

using (ClientContext context = new ClientContext("site-collection-url"))
{   
    //pass the sp web 
    Web oWeb = context.Site.OpenWeb("SubsiteLevel1");
    context.Load(oWeb);
    context.ExecuteQuery();

    var groups = oWeb.RoleAssignments.Groups;
    context.Load(groups);
    context.ExecuteQuery();

    foreach(Microsoft.SharePoint.Client.Group group in groups)
    {                    
        Console.WriteLine(group.Title);
    }   

}

To get the 2nd level subsite groups, replace the

context.Site.OpenWeb("SubsiteLevel1");

to below (use the server-relative url of the sp web):

context.Site.OpenWeb("SubsiteLevel1/SubsiteLevel2");

MSDN - RoleAssignmentCollection.Groups property