/// <summary>

        /// mongodb分页查询

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="sortQuery"></param>

        /// <param name="query"></param>

        public void GetPaging<T>(Dictionary<string, string> sortQuery,  Expression<Func<T,bool>> query)

        {

            if (sortQuery.Count < )

            {

                return;

            }

            IMongoClient mongoClient = new MongoClient("");

            IMongoDatabase mongoDatabase = mongoClient.GetDatabase("");

            var sort = Builders<T>.Sort;

            SortDefinition<T> sortimp = null;

            foreach (var item in sortQuery)

            {

                if (item.Value == "d")

                {

                    sortimp = sort.Descending(item.Key);

                }

                else

                {

                    sortimp = sort.Ascending(item.Key);

                }

            }

            mongoDatabase.GetCollection<T>(typeof(T).Name).Find<T>(query).Sort(sortimp)?.Limit().Skip();

        }