ASP.NET Identity - (ASP.NET MVC Authentication and Authorization)

ASP.NET Identity is a membership system that allows you to add authentication and authorization to your ASP.NET MVC applications. It enables you to manage user authentication and access control in a secure and scalable way. In this tutorial, we'll discuss how to use ASP.NET Identity in your ASP.NET MVC application.

Syntax

The syntax for using ASP.NET Identity in ASP.NET MVC involves configuring the membership provider in the web.config file and using the UserManager and SignInManager classes in your code.

Example

To use ASP.NET Identity in your ASP.NET MVC application, you need to follow these steps:

1. Add the necessary NuGet packages to your project:

   Microsoft.AspNet.Identity.Core
   Microsoft.AspNet.Identity.EntityFramework
   

2. Configure the membership provider in the web.config file:

   <connectionStrings>
     <add name="DefaultConnection"
          connectionString="connection string"
          providerName="System.Data.SqlClient" />
   </connectionStrings>
   
   <system.web>
     <authentication mode="None" />
     <compilation debug="true" targetFramework="4.8" />
     <httpRuntime targetFramework="4.8" />
     <membership defaultProvider="AspNetSqlMembershipProvider">
       <providers>
         <clear />
         <add name="AspNetSqlMembershipProvider"
              type="System.Web.Security.SqlMembershipProvider"
              connectionStringName="DefaultConnection"
              enablePasswordRetrieval="false"
              enablePasswordReset="true"
              requiresQuestionAndAnswer="false"
              requiresUniqueEmail="false"
              maxInvalidPasswordAttempts="5"
              minRequiredPasswordLength="6"
              minRequiredNonalphanumericCharacters="0"
              passwordAttemptWindow="10"
              applicationName="/" />
       </providers>
     </membership>
     <roleManager enabled="false" />
   </system.web>
   

3. Add the necessary code to your controllers or views to manage user authentication and authorization:

   // UserManager
   var userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context));
   var user = await userManager.FindAsync(userName, password);
   
   // SignInManager
   var signInManager = AuthenticationManager.GetSignInManager();
   signInManager.SignIn(user, isPersistent: false, rememberBrowser: false);
   

Explanation

ASP.NET Identity provides a simple way to add authentication and authorization to your ASP.NET MVC applications. It allows you to create and manage user accounts, user roles, and user permissions. The membership provider configuration in the web.config file allows you to specify which data store to use for user accounts. You can then use the UserManager and SignInManager classes to create, edit, and authenticate user accounts in your code.

Use

ASP.NET Identity is useful when you need to add user authentication and access control to your ASP.NET MVC application. It allows you to manage user accounts and roles in a secure and scalable way.

Important Points

Here are some important points to keep in mind when using ASP.NET Identity in your ASP.NET MVC application:

• ASP.NET Identity uses a database to store user account information, so you need to configure the membership provider in the web.config file to point to the correct database.
• You can customize the ASP.NET Identity user model by deriving from IdentityUser.
• ASP.NET Identity provides a default web UI for managing user accounts, but you can also customize the UI or create your own.

Summary

In this tutorial, we discussed ASP.NET Identity, which allows you to add authentication and authorization to your ASP.NET MVC applications. We covered the syntax, example, explanation, use, and important points of using ASP.NET Identity in your ASP.NET MVC application. With this knowledge, you can implement user authentication and access control in your ASP.NET MVC application in a secure and scalable way.