linq - Avoid "Parameterless Queries Error" with Linq Let clause

Question

I'd like my Linq query to create an additional column in the results on the fly. In this case the column is a Class object I created that will contain image info. I was wondering what the right way is of doing this:

var validPics = (from x in db.picsVotesTagsJs let picObj = new CarShowImages(x.picname) where x.enabled == 1 select x).Take(25);
var myArray = validPicSummaries.ToArray();

Line 2 gerenates the error:

Only parameterless constructors and initializers are supported in LINQ to Entities.

This is my first time using the Let clause. My queries are usually pretty simple.

Answer 1

创建无参数构造函数并使用一些公共属性（例如PicName）为您的CarShowImages对象设置图片名称：

var validPics = (from x in db.picsVotesTagsJs
                 where x.enabled == 1
                 select new CarShowImages { PicName = x.picname }).Take(25);
var myArray = validPics.ToArray();