asp.net-identity

Blazor Role based Authorization – No service for type ‘Microsoft.AspNetCore.Identity.RoleManager’

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I’m using a free project from GitHub that uses Blazor with EF Identity and SQLite. Its a good starting point for me to learn and add more functionality. Currently, I would like to add authorization to the project to allow specific users to have access to particular pages. My first step is to add default roles and account. I managed to find some sample codes that do that during startup. However, I get the following runtime error.

Add Roles to User using checkboxes

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I am developing a Razor application and I need the Admin to assign or update roles of the Users. I am using a checkbox to carry out this action. So far, I have been able to populate the view to show the users and their respective roles ticked in the checkbox, but I haven’t been able to update their roles, as anytime a checkbox is ticked to add a role, it doesn’t add the role to the user. I think this line is the culprit: var selectedRoles = model.Where(x => x.Selected).Select(y => y.RoleName);.

ASP.NET Core Identity registration XSRF/CSRF protection

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I’m learning asp.net core 3.1 with Razor pages. While watching tutorials on identity/authentication/authorization, a common example approach for user creation/registration form is to wrap some IsAdmin checkbox or user role selection dropdown box inside a @if(User.IsInRole(...)) block, to be bound and checked later in post handlers. This makes such that regular users can register as guests/customers etc, while admins can create other admin roles.