How to retrieve a data in a Variable from EntityDataSource

May be this is too trivial question.

I use C#, asp.net 4, EF4,

I have a page with a DetailsView contr开发者_开发技巧ol is connected with EntityDataSource. All is working.

In code behind I need to create a variable that will populate with data from EntityDataSource, lets imagine field UserId.

My questions: How to retrieve and use data from EntityDataSource?

Thanks guys. I am very beginners you advices are really important for me! Thanks

Maybe the DetailsView.DataKey Property will help you