Getting error whenever i try to assign role to user in Identity Framework

Question

here I am again.. I am trying to assign roles to the users which are registerd but whenever i try to update user details like assigning role i am getting role list required error. I try to debug the code but i didn't work. Need help from seniors!

View side code:

Controller side code:

Application user class which is inherited from identity user:

This is the output i getting:

Answer 1

Your validation error message has already explained the problem. When you submit the form, you only fill in the three fields of Name, Email and RoleId, but the Role and RoleList are not filled. Make these two fields nullable if you don't intend to populate them when the form is submitted:

[NotMapped]
public string? Role { get; set; }
[NotMapped]
public IEnumerable<SelectListItem>? RoleList { get; set; }