通过linq查询将字符串添加到一起

Question

我正在尝试组合这些值，如果有多个所有者ID，它会将行值添加到一起。

http://i.snag.gy/fOWWQ.jpg

使用图像Given，如果我的查询已经运行，我最终会以

结束

http://i.snag.gy/qO1DO.jpg

到目前为止我尝试了什么

from Person in TargetGroups
group Person by Person.PersonId into g
select new {g.PersonId, g.Value}

Answer 1

您只需要连接Car列的值，如下所示：

TargetGroups
.GroupBy(x => x.PersonId)
.Select(x => new { PersonId = x.Key, Cars = string.Join(",", x.Select(a => a.Car)) });

查询语法：

from Person in TargetGroups
group Person by Person.PersonId into g
select new {  PersonId =  g.Key, Cars = string.Join(",", g.Select(x => x.Car)) }