使用聚合的分页投影nhibernate查询的总结果

我正在动态构建一个需要实现分页的nhibernate预测查询。 就像是…

var projections = Projections.ProjectionList(); foreach (var p in projection.Projections) { IProjection newProjection = null; switch (p.AggregateFunc) { case AggregateFuncTypeEnum.GroupProperty: newProjection = Projections.GroupProperty(p.Path); break; case AggregateFuncTypeEnum.Sum: newProjection = Projections.Sum(p.Path); break; default: newProjection = Projections.Property(p.Path); break; } projections.Add(newProjection, p.Name); } criteria.SetProjection(projections).SetResultTransformer(new AliasToBeanResultTransformer(projectionType)); 

我可以得到前15个结果

 criteria.SetFirstResult(0); criteria.SetMaxResults(15); var results = criteria.List(); 

但是我还需要发送另一个查询来获取记录总数，但到目前为止我还没有想到这一点。 仍然需要应用投影，即如果结果按“代码”分组，总和为“成本”，那么100条记录可能会返回20行，而这是我感兴趣的20条。

如何获取将返回的记录总数？ 谢谢

Answer 1

也许这个：

 var rowcount = CriteriaTransformer.Clone(criteria); var goupprojections = Projections.ProjectionList(); var projections = Projections.ProjectionList(); foreach (var p in projection.Projections) { IProjection newProjection = null; switch (p.AggregateFunc) { case AggregateFuncTypeEnum.GroupProperty: newProjection = Projections.GroupProperty(p.Path); goupprojections.Add(Projections.GroupProperty(p.Path), p.Name); break; case AggregateFuncTypeEnum.Sum: newProjection = Projections.Sum(p.Path); break; default: newProjection = Projections.Property(p.Path); break; } projections.Add(newProjection, p.Name); } criteria.SetProjection(projections).SetResultTransformer(new AliasToBeanResultTransformer(projectionType)); if (goupprojections.Aliases.Length == 0) { rowcount.SetProjection(Projections.RowCount()) } else { rowcount.SetProjection(Projections.Count(goupprojections)) } var results = criteria.Future(); var count = rowcount.FutureValue();