How to configure confirmation email token lifespan in asp net core mvc

Configuring Confirmation Email in ASP.NET Core MVC

When developing an ASP.NET Core MVC application, it is often necessary to send confirmation emails to users for various purposes, such as account activation or password reset. These emails typically contain a token that expires after a certain period of time. In this article, we will explore how to configure the lifespan of the confirmation email token in ASP.NET Core MVC.

Step 1: Install the Required Packages

Before we can start configuring the confirmation email token lifespan, we need to install the necessary packages. Open your project in Visual Studio and navigate to the Package Manager Console. Run the following command to install the required packages:

Install-Package Microsoft.AspNetCore.Identity

Step 2: Configure Token Lifespan in Startup.cs

Next, we need to configure the lifespan of the confirmation email token in the Startup.cs file. Open the file and locate the ConfigureServices . Add the following code inside the method:

services.Configure( =>
    options.TokenLifespan = .FromHours(24);

This code configures the lifespan of the confirmation email token to 24 hours. You can adjust the TimeSpan value according to your requirements.

Step 3: and Send Confirmation Email

Now that we have configured the token lifespan, we can generate and send the confirmation email to the user. Here's an example of how to do this:

public async Task SendConfirmationEmail( userId)
    var user = await _userManager.FindByIdAsync(userId);
    var token = await _userManager.GenerateEmailConfirmationTokenAsync(user);
    var encodedToken = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(token));
    var confirmationLink = Url.Action("ConfirmEmail", "Account", new { userId = user.Id, token = encodedToken }, Request.Scheme);
    // Send the confirmation email with the generated link
    // ...
    return View();

In this example, we first retrieve the user by their ID the UserManager class. Then, we generate the email confirmation token and encode it using WebEncoders.Base64UrlEncode. Finally, we generate the confirmation link using the encoded token and send the email to the user.


Configuring the confirmation email token lifespan in ASP.NET Core MVC is a crucial step in ensuring the and usability of your application. By following the steps outlined in this article, you can easily customize the lifespan of the token according to your requirements.

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