NHibernate标准问题

Question

我在hibernate中有一个查询：

string[] NewsId = new string[] {"ABC","DEF","GHI"};

public IEnumerable<News> NewsSelected(string[] NewsId)
    {

        List<ICriterion> criteria = new List<ICriterion>();
        criteria.Add(Restrictions.In("Id", NewsId));
        var results = _repository.GetByCriteria(criteria);
        return results;
    }

它返回零，但

public IEnumerable<News> NewsSelected(string[] NewsId)
    {

        List<ICriterion> criteria = new List<ICriterion>();
        criteria.Add(Restrictions.In("Id", new[]{"ABC","DEF","GHI"}));
        var results = _repository.GetByCriteria(criteria);
        return results;
    }

完美无缺。我在这里缺少什么？

Answer 1

您需要将查询参数复制到本地变量，如：

string[] NewsId = new string[] {"ABC","DEF","GHI"};

public IEnumerable<News> NewsSelected(string[] NewsId)
{
    var newsId = NewsId;

    List<ICriterion> criteria = new List<ICriterion>();
    criteria.Add(Restrictions.In("Id", newsId));
    var results = _repository.GetByCriteria(criteria);
    return results;
}