LINQ内部连接 ​​- 从匿名中返回一个对象，该对象由两个表组合而成

Question

与此answer类似，我有一个包含Proudct和LanguageAttribute的匿名对象。然后我需要像这样更新Proudct对象的属性：

function [ vol1R ] = resampling(vol1, vol2, T)

[size1, size2, size3] = size(vol2);
vol1R = zeros(size1,size2,size3); % Initializing registered vol1

for i= 1:size1
    for j= 1:size2
        for k = 1:size3
            V = [i;j;k;1]; % V is the coordinates of a voxel on the registered vol1
                           % correspoding to voxel v on the  vol1
                           % V = T * v : Relationship between v and V

            v = T\V;       % Problem occurs here!!!!!!! v has some negative values
                           % v (coordinates in vol1)
            % continue 
        end

     end
end

现在如何将结果对象中只有Proudct的列表返回给调用方法？

Answer 1

你走了：

public IEnumerable<Product> GetProductList()
{

    var query = from p in db.Products
                 join la in db.LanguageAttribute on p.ID equals la.ID
                 where l.LanguageID == "en-US"
                 select new { Product = p, Description = la.Description };
    var result = query.ToList();

    result.ForEach(i => i.Product.Description = i.Description);

    List<Product> products = result.Select(i => i.Product).ToList();

    return products;
}

List没有实现IQueryable，所以我也改变了方法的返回类型。如果仍然需要IQueryable，则可以再次使用查询。