Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Passing dataset by reference
Message
 
 
À
12/03/2012 11:05:37
Information générale
Forum:
ASP.NET
Catégorie:
Autre
Versions des environnements
Environment:
C# 2.0
Divers
Thread ID:
01538045
Message ID:
01538055
Vues:
33
>>Hi,
>>
>>Here is a segment of code:
>>
>>
>>DataSet ds = new DataSet();
>>MyClass.MyMethod( ds );
>>
>>if (ds =!null)
>>{
>>    // Error message. Since ds is null.  But why the above ds =! null does not catch it? 
>>}
>>
>>MyClass.MyMethod( DataSet ds)
>>{
>>     // for testing
>>     ds = null;
>>}
>>
>>
>>Why does the line ds =! null does not catch that the ds is null?
>>
>>I also tried to declare the parameter ds as Out but it does not work either.
>
>
>Change
>
>if (ds =!null)
>
>into
>if (ds == null)
>
Thank you. But it still does not work. The only way, so far, I found the code working is if I use the Out clause when passing the parameter. But I saw it in someone else's code without the Out and it worked for them (actually her).
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham
Précédent
Répondre
Fil
Voir

Click here to load this message in the networking platform