我有一个IJapaneseDictionaryEntry
对象列表:
public interface IJapaneseDictionaryEntry
{
int Sequence { get; }
IEnumerable<IKanji> Kanjis { get; }
IEnumerable<IReading> Readings { get; }
IEnumerable<ISense> Senses { get; }
}
public interface IKanji
{
string Text { get; }
IEnumerable<KanjiInformation> Informations { get; }
IEnumerable<Priority> Priorities { get; }
}
我在这样做LINQ查询:
var a = entries.SelectMany(x => x.Kanjis)
.Select(x => new { x.Text, x.Priorities });
有没有办法可以过滤这个,所以我只检索至少有一个优先级的条目?
你可以使用Eumerable.Where
:
var a = entries.SelectMany(x => x.Kanjis)
.Where(x => x.Priorities.Any())
.Select(x => new { x.Text, x.Priorities });
或者在查询语法中:
var e =
from entry in entries
from kanji in entry.Kanjis
where kanji.Priorities.Any()
select new { kanji.Text, kanji.Priorities };