Session value becomes null across action method in same controller in mvc

Question

User-129908252 posted

I'm saving the list object into session like this In action method

HttpContext.Session["AdditionalShippingAddress"] = resultobj;

Another post action while accessing getting null

List<AdditionalShippingAddressModel> shippingAddressList = (List<AdditionalShippingAddressModel>)HttpContext.Session["AdditionalShippingAddress"];

I don't know why it is happening.

Please suggest me.

Thanks In Advance.

Answer 1

User475983607 posted

Did you make sure the data is not null to begin with?  

Other than that, you're describing the danger of using InProc Session without checking for null.  

Keep in mind, storing items in Session is the same as storing data in two different places; Session and the Database.  The database is typically and should be the system of record. Therefore, if Session is null for any reason you should reload Session from the system of record - the database.  This is a common pattern when using session or any form of secondary persistence. 

Answer 2

User-271186128 posted

Hi jagan12013,

First, as mgebhard said, please set a break point and check whether the resultobj is null or not.

Second, perhaps the session expired, please make sure it not exceeded the expiry time.

Finally, you could check the Session-State Modes, if you are using InProc mode, the data might loss. You could try to use SQLServer mode. More details, please refer to this article:

https://msdn.microsoft.com/en-us/library/ms178586.aspx

Best regards,
Dillion