linq - 转换 IQueryable

Question

I have a LINQ query that returns all absences for an employee. The first part of the linq statement gets a basic list of the employees details, but I also return an IQueryable list of illnesses related to that absence.

I'd like to somehow convert that IQueryable list to a comma delimited list of Illnesses.

Currently I use (majorly stripped down):

DetailsOfSickness = (
  from t2 in Illnesses
  join ai1 in AbsenceIllnesses on t2.IllnessID equals ai1.IllnessID
  select new { Illness = ", " + t2.IllnessName })

Which returns the list but I'd like the results like: Headache, Flu, Cramps.... etc. Any ideas?

score 9 · Accepted Answer

您可以用来String.Join创建逗号分隔的字符串。

string DetailsOfSickness = 
    String.Join(", ", (
      from t2 in illnesses
      join ai1 in absenceIllnesses on t2.IllnessID equals ai1.IllnessID
      select t2.IllnessName).ToArray());

score 3 · Accepted Answer

这样的事情应该这样做：

DetailsOfSickness = String.Join(", ", (
  from t2 in Illnesses
  join ai1 in AbsenceIllnesses on t2.IllnessID equals ai1.IllnessID
  select t2.IllnessName).ToArray());

请注意，非编译器，未经测试的代码。

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