asp.net mvc keep object alive, information

Question

i have this code

[HttpPost]
public ActionResult Index(LoginModel loginModel)
{
    if (ModelState.IsValid)
    { 
       // some lines of code . bla bla bla
         


        

Answer 1

Confusion

but when i refresh, everything messes up, it says that the loginModel is like null

Answer

This is due to the fact that you have read the TempData key and Once it is read, data will be lost for that particular key.

var Value = TempData["keyName"] //Once read, data will be lost

---

Question

how can i like keep track of the current login users

Answer

So to persist the data even after the data is read you can Alive it like below

var Value = TempData["keyName"];
TempData.Keep();                 //Data will not be lost for all Keys
TempData.Keep("keyName");        //Data will not be lost for this Key

TempData works in new Tabs/Windows also, like Session variable does.

You could use Session Variable also, Only major problem is that Session Variable are very heavy comparing with TempData. Finally you are able to keep the data across Controllers/Area also.

Hope this post will help you alot.