LINQ to Entities无法识别方法'Int32 Last [Int32]
问题描述：
这是什么问题?
int folderid = (from p in db.folder where p.isDefault == true select p.id).Last();
我收到此错误
LINQ to Entities does not recognize the method 'Int32 Last[Int32]
(System.Linq.IQueryable`1[System.Int32])' method, and this method cannot be
translated into a store expression.
答
Linq无法将Last()转换为任何有效的sql语句.所以我的建议是orderby decending和Take(1)
Linq can not translate the Last() to any valid sql statment. So my suggestion would be to orderby decending and Take(1)
也许是这样的:
int? folderid =(
from p in db.folder
where p.isDefault == true
orderby p.id descending
select p.id
).Take(1).SingleOrDefault();
我不知道该选择哪一个，因此您可能必须将orderby p.id descending更改为适合您的内容.
I don't know which to take so you might have to change the orderby p.id descending to something that suites you.