Identity Policy is a feature of ASP.NET Core Identity that allows you to define access control policies in your application based on claims and roles. These policies can be used to restrict access to certain parts of your Blazor app based on the user's identity.
Here's how you can use Identity Policy in your Blazor app:
- Install the necessary packages: In your Blazor app, install the following packages if they are not already installed: Microsoft.AspNetCore.Authorization and Microsoft.AspNetCore.Components.Authorization.
- Configure services: Open the Startup.cs file and add the following lines of code inside the ConfigureServices method:
services.AddAuthorization(options =>
{
options.AddPolicy("RequireAdminRole",
policy => policy.RequireRole("admin"));
});
This code adds a policy called "RequireAdminRole" which requires users to have a role of "admin" in order to access resources protected by this policy.
- Authorize components or routes: To protect certain components or routes with this policy, annotate them using the [Authorize] attribute with the desired policy name:
[Authorize(Policy = "RequireAdminRole")]
public class AdminPage : ComponentBase ...
Alternatively, you can annotate an entire page in Blazor with a @attribute [Authorize]
directive.
- Check for authorization status: You can determine whether a user is authorized to access a resource by injecting an instance of AuthorizationService in your component and calling its methods like
await AuthorizationService.AuthorizeAsync(User,"RequireAdminRole")
.
That's it! With these steps, you have set up Identity Policy in your Blazor app.