实体框架获取CurrentContext

Question

I'm extending an entities' partial class to have a method. How do I get a reference to the context that the entity is attached to (if any) to get more entities from the same context.

If that's not clear, basically the code I'm looking to write is along these lines (air code):

public void AssignSize(int width, int height)
{
    var size = (from s in this.context.Sizes
                where s.width == width && s.height == height
                select s).FirstOrDefault();

    ...
}

Nb: This doesn't work.

Answer 1

您需要将上下文传递给此方法，或者更好的是，不是传入宽度和高度，而是传入size对象本身。

Answer 2

Take a look at this article:

how-to-get-the-objectcontext-from-an-entity

It shows a workaround to get the context from an entity.

Answer 3

Entities db = new Entities();

Where Entities is the name that you said in EF ...