帮助：将sql命令转换为EF 4.1 Code First

Question

我有这个架构：

...我想使用此查询选择一些记录：

SELECT
    Articles.ArticleId,
    Articles.Title, 
    Articles.Tooltip, 
    Articles.UriTitle, 
    Articles.SubTitle, 
    Articles.Published,
    Tags.TagId
FROM Articles INNER JOIN
     ArticleTag ON Articles.ArticleId = ArticleTag.ArticleId INNER JOIN
         Tags ON ArticleTag.TagId = Tags.TagId
WHERE (Tags.TagId = @tagid) AND (Articles.Published = 1)

有人可以帮助我将此查询转换为EF 4.1 Code First（一个lambda表达式）吗？

更新

我使用@Ladislav Mrnka代码（作为lambda表达式）并且代码有效！现在我把生成的sql放在这里，并检查它以确保没有问题：

// C#:
var query = context.Articles.Where(a => a.Published && a.Tags.Any(t => t.TagId == tagId))
                            .Select(a = new {
                                a.ArticleId,
                                a.Title,
                                a.Tooltip,
                                a.UriTitle,
                                a.SubTitle,
                                a.Published
                            });

并且生成的sql是

SELECT 
[Extent1].[ArticleId] AS [ArticleId], 
[Extent1].[Title] AS [Title], 
[Extent1].[Tooltip] AS [Tooltip], 
[Extent1].[UriTitle] AS [UriTitle], 
[Extent1].[SubTitle] AS [SubTitle], 
[Extent1].[Description] AS [Description], 
[Extent1].[Keywords] AS [Keywords], 
[Extent1].[MetaDescription] AS [MetaDescription], 
[Extent1].[CreatedAt] AS [CreatedAt], 
[Extent1].[UpdatedAt] AS [UpdatedAt], 
[Extent1].[Viewed] AS [Viewed], 
[Extent1].[Published] AS [Published], 
[Extent1].[Body] AS [Body]
FROM [dbo].[Articles] AS [Extent1]
WHERE ([Extent1].[Published] = 1) AND ( EXISTS (SELECT 
    1 AS [C1]
    FROM [dbo].[ArticleTag] AS [Extent2]
    WHERE ([Extent1].[ArticleId] = [Extent2].[ArticleId]) AND ([Extent2].[TagId] = @p__linq__0)
))

Answer 1

尝试：

int tagId = ...;
var query = from a in context.Articles
            where a.Tags.Any(t => t.TagId == tagId) && a.Published 
            select new 
               {
                   a.ArticleId,
                   a.Title,
                   a.Tooltip,
                   a.UriTitle,
                   a.SubTitle,
                   a.Published,
                   tagId // I'm not sure if this will work but let give it a try  
               };

如果选择TagId不起作用，则问题不是太大，因为您知道所有记录都有相同的标记ID。