在 LINQ to Entities 查询中无法构造实体或复杂类型

public List<CustomerType> GetCustomerTypesBySchemaTypeCode(int schemaTypeCode)
{
var query = (from a in _reportTypeRepository.TableNoTracking.Where(v => v.SchemaType == schemaTypeCode)
group a by new { a.CustomerTypeId, a.SchemaType } into g
select new CustomerType
{
Id = g.Key.CustomerTypeId,
Name=""
// Name=_customerTypeRepository.GetById(g.Key.CustomerTypeId).Name
}).ToList();

return query;
}

public List<CustomerType> GetCustomerTypesBySchemaTypeCode(int schemaTypeCode)
{
var query = (from a in _reportTypeRepository.TableNoTracking.Where(v => v.SchemaType == schemaTypeCode)
group a by new { a.CustomerTypeId, a.SchemaType } into g
select g).ToList().Select(v =>
new CustomerType
{
Id = v.Key.CustomerTypeId,
Name = ""
// Name=_customerTypeRepository.GetById(g.Key.CustomerTypeId).Name
}).ToList();

return query;
}

原理： linq 选择数据时候 不能

new

已知的对象，只能匿名的。 但是如果从一个 List 列表 就可以

new

已知的类。