temp = temp.OrderByDescending(s => s.CreateTime).Skip((param.PageIndex - ) * param.PageSize).Take(param.PageSize);

var result = from u in temp.ToList()

                         join t in users on u.SendUserId equals t.UserId into sendUser

                         from s in sendUser.DefaultIfEmpty()

                         select new

                         {

                             u.DiamondId,

                             CreateTime = u.CreateTime.ToString("yyyy-MM-dd HH:mm:ss"),

                             u.Num,

                             IsAgenter = u.UserInfo.IsAgenter ? "是" : "否",

                             u.UserInfo.Name,

                             u.UserInfo.Phone,

                             Type=((Model.Enums.DiamondRecordType)u.Type).ToString(),

                             SendName=s==null?"":s.Name

                         };