private static bool UserIsMemberOfGroup(GraphConnection graphConnection, string userUPN, string groupDisplayName)
{
// Get the group for which we want to check membership
FilterGenerator filter = new FilterGenerator();
Expression filterExpression = ExpressionHelper.CreateEqualsExpression(typeof(Group), GraphProperty.DisplayName, groupDisplayName);
filter.QueryFilter = filterExpression;
PagedResults <Group> groupToCheckResults = graphConnection.List <Group>(null, filter);
if (groupToCheckResults.Results.Count == 1)
{
// Add group to our groups to check list
Group groupToCheck = groupToCheckResults.Results[0] as Group;
IList <String> groupsList = new List <string>();
groupsList.Add(groupToCheck.ObjectId);
// Get the user for which we want to check the group membership
FilterGenerator userFilter = new FilterGenerator();
Expression userFilterExpression = ExpressionHelper.CreateEqualsExpression(typeof(User), GraphProperty.UserPrincipalName, userUPN);
userFilter.QueryFilter = userFilterExpression;
User retrievedUser = new User();
PagedResults <User> pagedUserResults = graphConnection.List <User>(null, userFilter);
if (pagedUserResults.Results.Count == 1)
{
retrievedUser = pagedUserResults.Results[0] as User;
// Check if the user belongs to any of the passed groups
IList <String> memberships = graphConnection.CheckMemberGroups(retrievedUser, groupsList);
// If the passed group is returned back then the user is a member
if (memberships.Contains(groupToCheck.ObjectId))
{
return(true);
}
else
{
return(false);
}
}
else
{
throw new ArgumentException(String.Format("Group {0} does not exist", groupDisplayName));
}
}
else
{
throw new ArgumentException(String.Format("User {0} does not exist", userUPN));
}
}
