Pass array to a view using query string MVC

Question

I have a multiple roles and I need to pass those roles to a another view via Return RedirectTo Action method,

My Code

string[] roles = new string[] { "Admin", "Supervisor", "Interviewer" };
if (roles.Count() > 1)
{
    return RedirectToAction("LoginAs","Admin",new{@roles = roles});
}

When I pass like this in the LoginAs view shows me Url like this,

http://localhost:33883/Admin/LoginAs?roles=System.String[]

But there's no passed values.

Answer 1

Option 1 :

    public ActionResult Index()
    {
        string[] roles = new string[] { "Admin", "Supervisor", "Interviewer" };
        var routeParameters = new RouteValueDictionary();
        for (int i = 0; i < roles.Length; i++)
        {
            routeParameters["roles[" + i + "]"] = roles[i];
        }
        return RedirectToAction("Test", "Student", routeParameters);
    }

    public ActionResult Test(string[] roles)
    {
        return View("Index");
    }

Output -

Option 2: Use TempData

    public ActionResult Index()
    {
        string[] roles = new string[] { "Admin", "Supervisor", "Interviewer" };
        TempData["data"] = roles;
        return RedirectToAction("Test", "Student");
    }

    public ActionResult Test()
    {
        string[] roles = (string[])TempData["data"];
        return View("Index");
    }

Output -

Option 3 : Use Session

    public ActionResult Index()
    {
        string[] roles = new string[] { "Admin", "Supervisor", "Interviewer" };
        Session["data"] = roles;
        return RedirectToAction("Test", "Student");
    }

    public ActionResult Test()
    {
        string[] roles = (string[])Session["data"];
        return View("Index");
    }

Output -