例如:
var sums = modellist
.GroupBy(x => x.userId)
.Select(group => new
{
Peo = group.Key,
fist = group.First()
}).ToList();
解析:
GroupBy后面用Select;
则:循环每一个分组进行select
例如:
var sums = modellist
.GroupBy(x => x.userId)
.Select(group => new
{
Peo = group.Key,
fist = group.First()
}).ToList();
解析:
GroupBy后面用Select;
则:循环每一个分组进行select