TempData in Asp.net MVC is not working exactly the same as session in Asp.net?

Question

I am using TempData[] in MVC application but its not working fine as like that session.

After refresh the page after login page then tempdata have null value please suggest me and also using in web.config

<sessionState mode="InProc" timeout="10"/>.

Please, look at http://stackoverflow.com/questions/1500402/when-to-use-tempdata-vs-session-in-asp-net-mvc/1500485#1500485 — Elvin Mammadov, Aug 30 '13 at 06:59
If you need something like session, why don't you just use session? — VahidNaderi, Aug 30 '13 at 07:03

score 1 · Accepted Answer · edited May 23 '17 at 10:32

1

TempData is available only for a user’s session, so it persists only till we have read it and gets cleared at the end of an HTTP Request. A scenario that fits the usage of TempData, is when data needs to persist between two requests – a redirect scenario. You can use method Keep to store until next request

   TempData.Keep

http://msdn.microsoft.com/en-us/library/ee703497.aspx

To fill data from controller, create action:

public ActionResult GetData()
{
   // get data from your data source, replace with db call or where to get data
   var data = new [] {"sample1", "sample2"};

   return Json(data, JsonRequestBehavior.AllowGet);
}

on client when you need data:

$.getJSON(@Url.Action("GetData"), function(data) {
   // fill dropdown instead alert
   alert(data);
});

See more:

AJAX request aspnet

similar question but for post

edited May 23 '17 at 10:32

Community

1
1

answered Aug 30 '13 at 06:57

syned

2,201
19
22

Thanks Syned, its working fine. But I have one more question related to session value. how to manage the session into generic handler class? – Andas Hilloans Aug 30 '13 at 07:13
What do you mean "into generic handler class"? Describe please your use case. – syned Aug 30 '13 at 07:16
Genric handler for http web request which is inherit the "IHttpHandler" interface. – Andas Hilloans Aug 30 '13 at 11:20
Most of time you don't need handlers in your mvc application, why do you need it? – syned Aug 30 '13 at 12:07
Genric handler use for fill drop down using jquery. – Andas Hilloans Sep 02 '13 at 14:25
If data is related to some controller just add method to that controller and use ajax to get it – syned Sep 02 '13 at 14:29

score 0 · Answer 2 · answered Aug 30 '13 at 06:57

0

It is supposed to be null after a refresh because TempData is meant only for a single redirect. In your case you must use Session instead.

answered Aug 30 '13 at 06:57

Srinivas

1,063
7
15

Yes, you are right after refresh the page or single redirect TempData loose the data. But I thing session is not good way in MVC application – Andas Hilloans Aug 30 '13 at 07:00
TempData uses session. – Adam Tuliper Aug 30 '13 at 07:12

score 0 · Answer 3 · answered Aug 30 '13 at 07:29

You can store your data in session.

for example

 public static int Points
        {
            get
            {
                int points = Convert.ToInt32( HttpContext.Current.Session["PointssessionKey"]); 
                return  points;
            }
            set
            {
                HttpContext.Current.Session["PointssessionKey"] = value;
            }
        }

and also keep in temp data as

TempData.Keep

TempData in Asp.net MVC is not working exactly the same as session in Asp.net?

3 Answers3