public IActionResult UserList([FromQuery] JqGridParameter jqGridParameter)
        {
            var usersQuery = _userManager.Users.AsNoTracking();

            if (jqGridParameter._search == "true")
            {
                usersQuery = usersQuery.Where(BuildWhere <ApplicationUser>(jqGridParameter.FilterObject, null));
            }

            var users = usersQuery
                        .Include(u => u.UserRoles)
                        .ThenInclude(ur => ur.Role)
                        .OrderBy(u => u.OrderNumber)
                        .ToPagedList(jqGridParameter.Page, jqGridParameter.Rows);

            return(new JsonResult(
                       new
            {
                rows = users.Select(u => _mapper.Map <ApplicationUserDto>(u)),
                total = users.PageCount,       //总页数
                page = users.PageNumber,       //当前页码
                records = users.TotalItemCount //总记录数
            }
                       ));
        }
        public async Task <IActionResult> OnGetUserListAsync([FromQuery] JqGridParameter jqGridParameter)
        {
            var usersQuery = _userManager.Users.AsNoTracking();

            if (jqGridParameter._search == "true")
            {
                usersQuery = usersQuery.Where(BuildWhere <ApplicationUser>(jqGridParameter.FilterObject, null));
            }

            var users = usersQuery.Include(u => u.UserRoles).ThenInclude(ur => ur.Role).OrderBy(u => u.OrderNumber)
                        .Skip((jqGridParameter.Page - 1) * jqGridParameter.Rows).Take(jqGridParameter.Rows).ToList();
            var userCount = usersQuery.Count();
            var pageCount = Ceiling((double)userCount / jqGridParameter.Rows);

            return(new JsonResult(
                       new
            {
                rows     //数据集合
                    = users.Select(u => new
                {
                    u.UserName,
                    u.Sex,
                    u.Email,
                    u.PhoneNumber,
                    u.EmailConfirmed,
                    u.PhoneNumberConfirmed,
                    u.CreationTime,
                    u.CreationUserId,
                    u.IsEnable,
                    u.LastModificationTime,
                    u.LastModificationUserId,
                    u.OrderNumber,
                    u.RowVersion,
                    //以下为JqGrid中必须的字段
                    u.Id                     //记录的唯一标识,可在插件中配置为其它字段,但是必须能作为记录的唯一标识用,不能重复
                }),
                total = pageCount,           //总页数
                page = jqGridParameter.Page, //当前页码
                records = userCount          //总记录数
            }
                       ));
        }