使用MVC和AngularJS和实体框架编辑一个制表符

I'm trying to create a function that enables you to edit registered users. I'm trying to edit FirstName, LastName and Email. In this method I get the stuff that is written into the input fields, but Id is null so naturally editedUser is always null aswell. How can I get the users Id into the method so editedUser get's set to the user being edited?I'm trying to create a function that enables yo