如何添加CRUD操作在WPF第二个实体How to Add CRUD Operations to a Second Entity in WPF
I'm working on a WPF program, I use EF and MVVM. I have two entities : Student and Grade. Each student can have multiple grades. I have one window and one ViewModel(Student). I can add/update/delete student info using the program. When I add grades from database, I can see grades on the screen. I don't know how to modify my program to enable user enter,modify,delete grades on that screen. Can you give me some tips or advices about that? Here is my program currently looks like. Thanks.
(原文：Let your grid include an edit column that Populate the textfield when clicked)
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