从 IEnumerable
本文关键字:IEnumerable object lin | 更新日期: 2023-09-27 18:31:07
我需要做的是选择嵌套元素的列表,这是我的查询,returns
IEnumerable<IEnumerable<object>>
这是我的linq表达式:
from a in (questions.Select(x => x.AnswerList).ToList())
select a.Select(x => x.AnswerBasicViewModel);
我应该怎么做才能让它只return
IEnumerable<object>
而不是IEnumerable<IEnumerable<object>>
?
只是为了在我的样本中清楚,我想得到IEnumerable<AnswerBasicViewModel>
.
使用SelectMany
运算符:
from q in questions
from a in q.AnswerList
select a.AnswerBasicViewModel
或者干脆
questions.SelectMany(q => q.AnswerList)
.Select(a => a.AnswerBasicViewModel)
SelectMany 是这里要走的路:
questions.SelectMany(x => x.AnswerList).Select(x => x.AnswerBasicViewModel);