How to update many to many relationship in entity framework

Question

Hi, I have many to many relationship between students and courses as below. I want to update the courses for given student(ex student Id 10 has selected two courses having Id 2 and 6 .Now I want to delete course Id 6 for student id 10 and add new course id ,say 3 ). I am using code first approach with Entity framework 6 in MVC4. Can anyone help to solve this issue.?

Naresh Singhal · Answer

Hi Vishal, Reference to your reply, go through below links, i think it's what you need exactly. https://www.codeproject.com/Tips/893609/CRUD-Many-to-Many-Entity-Framework. http://www.entityframeworktutorial.net/EntityFramework4.3/update-many-to-many-entity-using-dbcontext.aspx Though i can help you personally but unfortunately i don't have your code . still you should try with the help of above links, i am damn sure it will bring you to the solution.

Naresh Singhal · Answer

Hi Vishal, Kindly go through below link, its all about Code First Approach with EF. Hope you may get your solution from below link. https://www.codeproject.com/Tips/869986/CRUD-operation-with-Entity-Framework-Code-First

vishal pawar · Answer

Hi Naresh, Thanks for your reply. but I am looking for "Many-to -Many" update. In the link given by you, its about one to-many . If you can give solution for many- to many update,Kindly help.

Mageshwaran R · Answer

Hi, Please refer the below link, it might helps you https://www.codeproject.com/Tips/893609/CRUD-Many-to-Many-Entity-Framework

Packiaraj Santhiyagu · Answer

Hi, This link will helps you, https://www.codeproject.com/Tips/893609/CRUD-Many-to-Many-Entity-Framework.

Hemant Jindal · Answer

Hi Vishal Please refer this link https://www.thereformedprogrammer.net/updating-many-to-many-relationships-in-entity-framework-core/ hope this help you thanks Hemant Jindal