Want to Run Some Code only One Time

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Hello Friends,

I am working on an online shopping website. I need some execute some code only at one time. Actually i want to add Cash On Delivery charge only at one time per order. I have write code but its doesn't work.
Here is code :

C#

if (!IsPostBack)
{
    Single CODCharges = 100;
    NetAmount = cart.Sum(c => c.NetAmount + CODCharges);
}
else
{
    NetAmount = cart.Sum(c => c.NetAmount);
}

It's not work,
help me
~~thx~~ Thanks to all in advance

Posted 18-May-12 3:43am

Yatin_Chauhan

Updated 18-May-12 6:17am

Shahin Khorshidnia

v4

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-05-18T05:05:00

Solution 1

I have a whole article devoted to this problem, please read:
Wish You Were Here… Only Once[^].

The technique I invented is quite sophisticated; in part, I planned this work as a kind of computer joke illustrating non-trivial things related to stack, uniqueness, etc. Nevertheless, this is practically well-working code. But I also describe the problem and its "usual" solutions.

—SA

Posted 18-May-12 5:05am

Sergey Alexandrovich Kryukov

Updated 18-May-12 6:26am

v3

Comments

Maciej Los 18-May-12 11:21am

Good answer and article too, my 5!

Sergey Alexandrovich Kryukov 18-May-12 11:23am

Thank you. That work as a real fun, one of those weird things I do from time to time.
--SA

Shahin Khorshidnia 18-May-12 12:18pm

+5

Sergey Alexandrovich Kryukov 18-May-12 12:25pm

Thank you, Shahin.
--SA