用户创建搜索过滤器。已批准

Question

我正在创建一个搜索页面，以便根据用户名，审批状态以及当前是否已将其锁定来过滤用户。

                if (!string.IsNullOrEmpty(filterby))
        {
            int totalRecords;
            if (filterby == "all")
            {
                viewModel.PaginatedUserList = Membership.GetAllUsers(page, pageSize, out totalRecords).ToPaginatedList(page, pageSize, totalRecords, searchterm, filterby);
            }
            else if (!string.IsNullOrEmpty(searchterm))
            {
                string query = searchterm + "%";
                if (filterby == "email")
                {
                    viewModel.PaginatedUserList = Membership.FindUsersByEmail(query, page, pageSize, out totalRecords).ToPaginatedList(page, pageSize, totalRecords, searchterm, filterby);
                }
                else if (filterby == "username")
                {
                    viewModel.PaginatedUserList = Membership.FindUsersByName(query, page, pageSize, out totalRecords).ToPaginatedList(page, pageSize, totalRecords, searchterm, filterby);
                }

                else if (filterby == "approval")
                {
                    viewModel.PaginatedUserList = (PaginatedList<MembershipUser>) Membership.GetAllUsers(page, pageSize, out totalRecords).ToPaginatedList(page, pageSize, totalRecords, searchterm, filterby).Where(x => x.IsApproved == false);
                }
            }
        }

我得到“无法转换类型的对象'WhereListIterator 1[System.Web.Security.MembershipUser]' to type 'Project.Core.Pagination.PaginatedList 1 [System.Web.Security.MembershipUser]'。”每当我尝试通过批准搜索。由于我还在学习，我不太确定解决这个问题的最佳方法。任何帮助将不胜感激。