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Null object

Posted on 2011-03-11
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Last Modified: 2013-12-17

Hi,

I'm developing a web application, where it has few stages to process an order. There is an object as paymentInfo from PaymentInfo class (in step 3) and I need to use it in step 4. How can I access paymentInfo object from the last phase (step 4)?

The problem is that when I declare an object such as:

PaymentInfo myobj = new PaymentInfo();

I see myobj has null value.

Any help is appreciated.

Regards,
ak





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Question by:akohan
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7 Comments
 
LVL 23

Expert Comment

by:wdosanjos
ID: 35111022
You should save the PaymentInfo object in the Session.  Something like this:

On Step 1:
PaymentInfo myobj = new PaymentInfo();
Session["PaymentInfo"] = myobj;

On the following steps:
PaymentInfo myobj = (PaymentInfo)Session["PaymentInfo"];


More info on Session:
http://msdn.microsoft.com/en-us/library/ms178581.aspx

I hope this helps.
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LVL 7

Expert Comment

by:jdavistx
ID: 35111029
Not sure how your stages are setup, but it looks like you need to pass your object to the next phase.  You need to send myObj to the next phase using whatever mechanism starts phase 4.  Your myObj is null because you're initializing a brand new PaymentInfo object.
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Author Comment

by:akohan
ID: 35111080

that is right but temporary I need to pass credit card info and saving it into session is not a safe way. Any comments on this?

Thanks.
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LVL 23

Accepted Solution

by:
wdosanjos earned 2000 total points
ID: 35111136
Session state is kept on the server memory by default.  Assuming you are using SSL, why do you think that's unsafe?   You can always encrypt the information in memory, if memory access is a concern.

More on Securing Session State:
http://msdn.microsoft.com/en-us/library/ms178201.aspx
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Author Comment

by:akohan
ID: 35111225

Yes, I do have SSL.
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LVL 75

Expert Comment

by:käµfm³d 👽
ID: 35121528
Do keep in mind, though, that whatever you decide to store in session, every user will have their own session. If you plan to store large objects, saving them to a DB may be a more logical choice.
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Author Closing Comment

by:akohan
ID: 35151040
Thanks
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