如何将tablexid和tableyid添加到关系表中(在实体框架上显示为导航属性)?

I had to use something like this:

db.Items.Where(id => id.Id == newItem.Id).First().Tags.Add(newTag);

这意味着。In the "db" in the "Items" table where "the Item Id is the one i'm looking for", select it, then go via the navigation property to the "Tags" table and add a "new Tag".

这样做会用新的ID更新关系的itemtags表。

:)