What does this mean?

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C#

int? count = (from cartItems in storeDB.Carts
                     where cartItems.CartId == ShoppingCartId
                     select (int?)cartItems.Count).Sum();

and

C#

return count ?? 0;

Posted 11-Jan-12 23:58pm

Yousif Mazeh

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KiranBabu M 12-Jan-12 6:07am

what do u want to know in the above code?

1 solution

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Wayne Gaylard · Accepted Answer · 2012-01-12T00:03:00

Solution 1

int? indicates a nullable integer i.e an integer type that can also store a null value.

the ?? is called the null-coalescing operator and is used for defining a default value for nullable types. So in your case if count is null, it will return 0.

Hope this helps

Posted 12-Jan-12 0:03am

Wayne Gaylard

Comments

RaisKazi 12-Jan-12 6:06am

My 5.

Wayne Gaylard 12-Jan-12 6:11am

Thanks!

Yousif Mazeh 12-Jan-12 6:09am

thank u very much :)

Wayne Gaylard 12-Jan-12 6:12am

My pleasure - glad to help.