Page action wise authorization asp net core razor pages


ASP.NET is a popular programming used for building web . One common requirement in web development is to implement page action wise authorization, where certain actions on a page are restricted to users or roles. In this article, we will explore how to page action wise authorization in ASP.NET Core Razor .

Step 1: Define Roles and Policies

Before we can implement page action wise authorization, we need to define the roles and policies that will govern access to different actions. Roles represent groups of users with similar permissions, while policies define the specific rules for accessing certain actions.

To define roles and policies in ASP.NET Core, we can use the built-in framework. Here's an example of how to define roles and policies:

// Define roles
public static class Roles
    public const string Admin = "Admin";
    public const string User = "User";

// Define policies
public static class Policies
    public const string AdminOnly = "AdminOnly";
    public const string UserOnly = "UserOnly";

Step 2: Configure Authorization

Once we have roles and policies, we need to configure authorization in our ASP.NET Core . This involves specifying which actions require which roles or policies.

To configure authorization, we can use the Authorize attribute in our Razor Pages. Here's an example:

[Authorize(Roles = Roles.Admin)]
public class AdminPageModel : PageModel
    // Actions restricted to Admin role

[Authorize(Policy = Policies.UserOnly)]
public class UserPageModel : PageModel
    // Actions restricted to User role

Step 3: Handle Unauthorized Access

When a user tries to access an action that they are not authorized to, we need to handle the unauthorized access and provide an appropriate response. This can be done by customizing the default behavior of the Authorize attribute.

Here's an example of how to handle unauthorized access in ASP.NET Core Razor Pages:

public class CustomAuthorizationHandler : AuthorizationHandler

To use the custom authorization handler, we need to register it in the ConfigureServices of our Startup class:

services.AddAuthorization(options =>
    options.AddPolicy(Policies.AdminOnly, policy => policy.Requirements.Add(new AuthorizeAttribute { Roles = Roles.Admin }));
    options.AddPolicy(Policies.UserOnly, policy => policy.Requirements.Add(new AuthorizeAttribute { Roles = Roles.User }));



By following these steps, we can implement page action wise authorization in ASP.NET Core Razor Pages. Defining roles and policies, configuring authorization, and unauthorized access are key components of building secure web applications. With ASP.NET Core, we have powerful tools and frameworks at our disposal to achieve these goals.

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