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Null for a string
Message
De
07/05/2009 14:13:00
 
 
À
07/05/2009 14:02:56
Mike Cole
Yellow Lab Technologies
Stanley, Iowa, États-Unis
Information générale
Forum:
ASP.NET
Catégorie:
ADO.NET
Versions des environnements
Environment:
C# 3.0
OS:
Windows XP
Network:
Windows 2003 Server
Database:
MS SQL Server
Divers
Thread ID:
01398411
Message ID:
01398421
Vues:
53
What's the advantage of using
Nullable<int> myValue = null;
over
int? myValue = null;
?

>Naomi, it depends if your variable type is a Value type or a Reference type. A value type (int, decimal, etc) cannot have null assigned to it, so your best bet is to use the Nullable generic and declare like:
>Nullable<int > myValue = null;
>A reference type (string, classes) are values in the stack that point to values on the heap. When you declare a reference type as null, you are essentially point it at nothing.
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