//根据子项目id得到flowjump实体类
flowJumps = this.FlowJumps;
//按工序groupby flowjumps
IEnumerable<IGrouping<int, FlowJump>> query =
flowJumps.GroupBy(pet => pet.processID, pet => pet);
foreach (IGrouping<int, FlowJump> info in query)
{
List<FlowJump> sl = info.ToList<FlowJump>();//分组后的集合
//也可循环得到分组后,集合中的对象,你可以用info.Key去控制
//foreach (FlowJump set in info)
//{
//}
}
![](https://img2024.cnblogs.com/blog/35695/202408/35695-20240813180353098-2140851696.jpg)