In this article I will explain with an example, how to pass (send) Session value from one Controller to another Controller in ASP.Net Core (.Net Core 8) MVC.
Note: For beginners in ASP.Net Core (.Net Core 8) MVC, please refer my article ASP.Net Core 8: Hello World Tutorial with Sample Program example.
 
 

Model

Following is a Model class named PersonModel with four properties i.e. PersonId, Name, Gender and City.
public class PersonModel
{
    ///<summary>
    /// Gets or sets PersonId.
    ///</summary>
    public int PersonId { get; set; }
 
    ///<summary>
    /// Gets or sets Name.
    ///</summary>
    public string Name { get; set; }
 
    ///<summary>
    /// Gets or sets Gender.
    ///</summary>
    public string Gender { get; set; }
 
    ///<summary>
    /// Gets or sets City.
    ///</summary>
    public string City { get; set; }
}
 
 

Namespace

You will need to import the following namespaces.
using Newtonsoft.Json;
 
 

Controllers

Source Controller

The Controller consists of following Action methods.

Action method for handling GET operation

Inside this Action method, Session object is set.
Then string value is set in the Session object using the SetString method of the HttpContext.Session property in Controller and the View is returned.
 

Action method for handling POST operation

This Action method handles the Form Submission when the Button is clicked.
Note: For details about how to enable Session, please refer my article .Net Core 8: Enable Session in ASP.Net Core.
 
When the Send Button is clicked, the object of PersonModel class is serialized into a JSON string and then set into the Session object using the SetString method of the HttpContext.Session property.
Finally, redirection is made to the PersonDetails Action method.
public class HomeController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public IActionResult Send()
    {
        //Create the Model object.
        PersonModel person = new PersonModel
        {
            PersonId = 1,
            Name = "Mudassar Khan",
            Gender = "Male",
            City = "Mumbai"
        };
 
        //Serialize and set value in Session object.
        HttpContext.Session.SetString("Person", JsonConvert.SerializeObject(person));
 
        //Send Model object as Session to another Controller.
        return RedirectToAction("Index", "PersonDetails");
    }
}
 

Destination Controller

The Controller consists of the following Action method.
 

Action method for handling GET operation

Inside this Action method, the JSON string is fetched from the Session object and deserialized back to the PersonModel class object and finally it is sent to the View.
public IActionResult Index()
{
    //Fetch the Serialized JSON string from Session.
    PersonModel person = JsonConvert.DeserializeObject<PersonModel>(HttpContext.Session.GetString("Person"));
 
    //Return Model to View.
    return View(person);
}
 
 

Views

Source View

The View consists of an HTML Form with following ASP.Net Tag Helpers attributes.
asp-action – Name of the Action. In this case the name is Send.
asp-controller – Name of the Controller. In this case the name is Home.
method – It specifies the Form Method i.e. GET or POST. In this case it will be set to POST
The Form consists of a Submit Button and when the Button is clicked, the Form is submitted.
@addTagHelper*,Microsoft.AspNetCore.Mvc.TagHelpers
@{
    Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <form method="post" asp-action="Send" asp-controller="Home">
        <input type="submit" value="Send" />
    </form>
</body>
</html>
 

Destination View

Inside the View, in the very first line the PersonModel class is declared as Model for the View.
The View consists of an HTML Table which is used for displaying the values of the properties of the PersonModel class.
@model Pass_Session_MVC_Core.Models.PersonModel
@{
     Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <table cellpadding="0" cellspacing="0">
        <tr>
            <th colspan="2" align="center">Person Details</th>
        </tr>
        <tr>
            <td>PersonId:</td>
            <td>@Model.PersonId</td>
        </tr>
        <tr>
            <td>Name:</td>
            <td>@Model.Name</td>
        </tr>
        <tr>
            <td>Gender:</td>
            <td>@Model.Gender</td>
        </tr>
        <tr>
            <td>City:</td>
            <td>@Model.City</td>
        </tr>
    </table>
</body>
</html>
 
 

Screenshot

ASP.Net Core: Pass (Send) Session value from one Controller to another Controller
 
 

Downloads

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