nHibernate Linq Projection

Question

我正在使用Linq for 1.0版本的nHibernate。我跑的时候 以下linq语句我收到错误

不是单一长度投影：姓氏

我可以在网上找到很少的引用并查看 来源说它永远不会发生！ ClientID是Int类型和 姓氏是一个字符串。当我注释掉所有字符串字段时 投影，只需将ClientID运行就可以了，但是只要我添加就可以了 姓氏错了。

var context = m_ClientRepository.Linq;

var result = (from client in context
              from address in client.Addresses
              from contact in client.Contacts
              where client.Surname.StartsWith(surname)
              && client.GivenName.StartsWith(givenName)
              && contact.Value.StartsWith(phoneNumber)
              group client by new { client.ClientID, client.Surname, client.GivenName } into clientGroup
              select new ClientSearchDTO()
              {
                  ClientID = clientGroup.Key.ClientID,
                  Surname = clientGroup.Key.Surname,
                  GivenName = clientGroup.Key.GivenName,
                  Address = clientGroup.Max(x => x.Addresses.FirstOrDefault().Address),
                  PhoneNumber = clientGroup.Max(x => x.Contacts.FirstOrDefault().Value)
              })
              .Skip(Paging.FirstRecord(pageNumber))
              .Take(5);

Answer 1

AFAIK，LINQ to nHibernate 1.0中select子句aren't supported中的子查询。

这可能是您问题的根源。