Question

I am working on a tag cloud application. There are 3 database tables.

Content: ContentID, Text

Tag: TagID, Name

TagRelation: TagRelationID, TagID, ContentID

The code below is wrong. Because ‘Contains’ clause doesn’t take a list of parameters like the ‘IN’ SQL clause. Is there an alternative clause that I can use to make this code work?

        public List<Content> GetTagArticles(String tagName)
    {
        var relations = db.TagRelation.Where(t => t.Tag.Name == tagName).ToList();

        var contents = db.Content.Where(c => c.TagRelation.Contains(relations)).ToList();



        return contents.ToList();

    }

Answer 1

Try the following:

var contents = db.Content.SelectMany(c => c.TagRelation).Where(tr => relations.Contains(tr)).ToList();