how to use session value in app_Code layer (logic file) in asp.net

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hi to all,
Here i using session value in normal page.now i want to pass in app_Code file page (logic page i need the session value).following below code is used in my application but i occur null values.

Normal page code: (.CS)

C#

string mac1 = string.Empty;

      
      string mac1 = string.Empty;

        string mac = string.Empty;
        //  GetMACAddress();
        mac = macAddress.Value;

       // 

        Session["macAddress"] = mac;
        mac1 = Session["macAddress"].ToString();

In APP_CODE
logic.cs:-
string mac2 = System.Web.HttpContext.Current.Session["macAddress"].ToString();

but this code return null. how to access session value in app_code. Kindly help for this task.

Posted 19-Jun-15 0:03am

JOTHI KUMAR Member 10918227

Updated 19-Jun-15 0:37am

v2

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Sinisa Hajnal 19-Jun-15 6:33am

Are you sure you're setting the value?

JOTHI KUMAR Member 10918227 19-Jun-15 6:35am

sorry what??

jaket-cp 19-Jun-15 6:49am

I believe what Sinisa is asking, have you set the session value, as in the Normal page code: (.CS)
Session["macAddress"] = mac;

Also click on the reply to the comment, otherwise I do not believe the person who made the comment will get a notification.

JOTHI KUMAR Member 10918227 19-Jun-15 6:51am

hmm yeah

2 solutions

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PANKAJMAURYA · Answer 1 · 2015-06-19T00:42:00

Solution 1

Hi

You must be missing something

Session values will be available through

System.Web.HttpContext.Current.Session["VariableName"]

Before getting session value you must set it .

Either you are not setting it or your session expires before you trying to get it.

Posted 19-Jun-15 0:42am

PANKAJMAURYA

Comments

JOTHI KUMAR Member 10918227 19-Jun-15 7:02am

sorry im new in .net.when the session expires.how to extend the session.can you tell me

PANKAJMAURYA · Answer 2 · 2015-06-19T01:21:00

By default, Session timeouts are 20 minutes in ASP.NET. To increase the timeout or expiry you have to change the timeout attribute for SessionState in the web.config file

<sessionstate timeout="40" />

If you are using Forms authentication, You have to adjust this attribute:

<authentication mode="Forms">
          <forms timeout="40" />
    </authentication>