How to Pass Data Between Pages Using Session in ASP.NET Core

Try

Page 1

public IActionResult PageOne()
{
    HttpContext.Session.SetString("UserName", "JohnDoe");
    HttpContext.Session.SetInt32("UserId", 123); // Storing an integer

    // You can also store complex objects by serializing them to JSON
    var userProfile = new { Name = "JaneDoe", Email = "jane@example.com" };
    HttpContext.Session.SetString("UserProfile", System.Text.Json.JsonSerializer.Serialize(userProfile));

    return RedirectToAction("PageTwo"); // Redirect to the target page
}

 Page 2

// Example in a Controller or Razor Page code-behind
public IActionResult PageTwo()
{
    string userName = HttpContext.Session.GetString("UserName");
    int? userId = HttpContext.Session.GetInt32("UserId");

    // Retrieve and deserialize the complex object
    string userProfileJson = HttpContext.Session.GetString("UserProfile");
    dynamic userProfile = null;
    if (userProfileJson != null)
    {
        userProfile = System.Text.Json.JsonSerializer.Deserialize<dynamic>(userProfileJson);
    }
    return View();
}