关于在LINQ表达式中出现错误,就是方法不能将时间转成表达式,经过不断的思考,终于明白了转码解决。本人就是想把后台的时间对象转成时间戳然后传给前台调用。
这样就出错:
var comments = CommentSrv.GetListByCondition(t => t.ProductId == id //商品评论
&& t.Type ==Type
&& t.Content != null
&& t.Content != " ").OrderByDescending(t => t.CreateDate);
var product = new {//展示商品的评论内容(包含时间,商品名,评论)
data.ID,
data.Name,
Commnents = comments,
CreateDate = t.CreateDate.ToUnixTime()//时间转换
};
失败提示:
LINQ to Entities does not recognize the method 'Int64 ToUnixTime(System.DateTime)' method, and this method cannot be
translated into a store expression.
修改后:
var comments = CommentSrv.GetListByCondition(t => t.ProductId == id //商品评论
&& t.Type ==Type
&& t.Content != null
&& t.Content != " ").OrderByDescending(t => t.CreateDate)).ToList();//只要修改这里就可以
var product = new {//展示商品的评论内容(包含时间,商品名,评论)
data.ID,
data.Name,
Commnents = comments,
CreateDate = t.CreateDate.ToUnixTime()//时间转换毫秒
};
时间戳转换结果:
"CreateDate":1336755430000