下面的asp.net core 2.1成功了。这可能适用于其他地方。字典ControllerBase.ControllerContext.RouteData.Values可以从action方法中直接访问和写入。也许这是其他解决方案中数据的最终目的地。它还显示了缺省路由数据的来源。

[Route("/to/{email?}")]
public IActionResult ToAction(string email)
{
    return View("To", email);
}
[Route("/from")]
public IActionResult FromAction()
{
    ControllerContext.RouteData.Values.Add("email", "mike@myemail.com");
    return RedirectToAction(nameof(ToAction));
         // will redirect to /to/mike@myemail.com
}
[Route("/FromAnother/{email?}")]`
public IActionResult FromAnotherAction(string email)
{
    return RedirectToAction(nameof(ToAction));
         // will redirect to /to/<whatever the email param says>
         // no need to specify the route part explicitly
}

....

int parameter=Convert.ToInt32(Session["Id"].ToString());

....

return RedirectToAction("ActionName", new { Id = parameter });

//How to use RedirectToAction in MVC

return RedirectToAction("actionName", "ControllerName", routevalue);

例子

return RedirectToAction("Index", "Home", new { id = 2});

如果有人想显示[httppost]的错误消息，那么他/她可以尝试通过传递一个ID使用

return RedirectToAction("LogIn", "Security", new { @errorId = 1 });

详情如下

 public ActionResult LogIn(int? errorId)
        {
            if (errorId > 0)
            {
                ViewBag.Error = "UserName Or Password Invalid !";
            }
            return View();
        }

[Httppost]
public ActionResult LogIn(FormCollection form)
        {
            string user= form["UserId"];
            string password = form["Password"];
            if (user == "admin" && password == "123")
            {
               return RedirectToAction("Index", "Admin");
            }
            else
            {
                return RedirectToAction("LogIn", "Security", new { @errorId = 1 });
            }
}

希望它能正常工作。

您可以将id作为RedirectToAction()方法的routeValues参数的一部分传递。

return RedirectToAction("Action", new { id = 99 });

这将导致重定向到Site/Controller/Action/99。不需要临时或任何类型的视图数据。

RedirectToAction带参数:

return RedirectToAction("Action","controller", new {@id=id});