我在这个表达式中遇到了上述错误:
var aggregate = from t in entities.TraceLines
join m in entities.MethodNames.Where("it.Name LIKE @searchTerm", new ObjectParameter("searchTerm", searchTerm)) on t.MethodHash equals m.MethodHash
where (t.CallTypeId & (int)types) == t.CallTypeId && t.UserSessionProcessId == m_SessionId
group t by m.Name into d
select new
{
d.Key,
d.Sum(x => x.InclusiveDurationMilliseconds) // <- squigglies on this line
};
知道是什么导致了这个错误吗?
最佳答案
做类似的事情:
select new
{
d.Key,
Sum = d.Sum(x => x.InclusiveDurationMilliseconds)
};
它可以从另一个属性中投影属性名称,但不能从方法中投影....
关于c# - LINQ to Entities Group By 表达式给出 'Anonymous type projection initializer should be simple name or member access expression',我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3097385/