Cosmos DB按标记值降序排列

我使用Cosmos DB C#库创建了一个助手方法,使用continuationtoken按降序检索行。但是,当我尝试按降序排序时,它不会返回任何行。查询不使用orderby或orderbydescending。请让我知道我需要更正什么才能按正确的顺序检索行。

  public static async Task<(IEnumerable<T> resultRows, string responseContinuation)> GetIAlltemsAsyncOrderByCount(Expression<Func<T,bool>> predicate, Expression<Func<T,object>> orderby,bool descending, int MaxItemCountPerQuery,string continuationToken="")
    {
        var uri = UriFactory.CreateDocumentCollectionUri(DatabaseId, CollectionId);

        var feedOptions = new FeedOptions
        {
            MaxItemCount = MaxItemCountPerQuery
        };

        string responseContinuation = "";

        if (!string.IsNullOrEmpty(continuationToken))
        {
            feedOptions.RequestContinuation = continuationToken;
            responseContinuation = continuationToken;
        }

        var resultRows = new List<T>();

            using (var query = descending ? client.CreateDocumentQuery<T>(uri, feedOptions).Where(predicate).OrderByDescending(orderby).AsDocumentQuery() : client.CreateDocumentQuery<T>(uri, feedOptions).Where(predicate).OrderBy(orderby
                ).AsDocumentQuery())
            {


                if (query.HasMoreResults)
                {
                    var result = await query.ExecuteNextAsync<T>();

                    responseContinuation = result.ResponseContinuation;

                    resultRows.AddRange(result);


                    /* process result */

                }
            }

            return (resultRows, responseContinuation);

    }