Why isn't this casting?

[Joe]

entityType implements IPersistent and does get into the if statement but p
is always null.

Type t = entityType.GetI nterface(typeof (IPersistent).N ame);

if (t != null)
{
IPersistent p = entityType as IPersistent;

// p Is always null.
}

-Joe

[Bruno Jouhier]

Re: Why isn't this casting?

You are mixing the "type" and the "instance"

In your code, entityType is a type.
You probably have a variable like entityInstance that references an instance
of entityType, and the "as" operator should be applied to this variable:

IPersistent p = entityInstance as IPersistent;

Bruno

"Joe" <jbassking@noem ail.noemail> a écrit dans le message de news:
%23QohlQeOGHA.3 360@TK2MSFTNGP1 5.phx.gbl...[color=blue]
> entityType implements IPersistent and does get into the if statement but p
> is always null.
>
> Type t = entityType.GetI nterface(typeof (IPersistent).N ame);
>
> if (t != null)
> {
> IPersistent p = entityType as IPersistent;
>
> // p Is always null.
> }
>
> -Joe
>[/color]

[Joe]

Re: Why isn't this casting?

Bruno,

Does this mean I get the stupid question award for the year? I can't believe
I didn't realize I was trying to cast the type and not the object.

Thanks for your clear set of eyes!

-Joe

"Bruno Jouhier" <bjouhier@clu b-internet.fr> wrote in message
news:44001767$0 $1146$7a628cd7@ news.club-internet.fr...[color=blue]
> You are mixing the "type" and the "instance"
>
> In your code, entityType is a type.
> You probably have a variable like entityInstance that references an
> instance of entityType, and the "as" operator should be applied to this
> variable:
>
> IPersistent p = entityInstance as IPersistent;
>
> Bruno
>
> "Joe" <jbassking@noem ail.noemail> a écrit dans le message de news:
> %23QohlQeOGHA.3 360@TK2MSFTNGP1 5.phx.gbl...[color=green]
>> entityType implements IPersistent and does get into the if statement but
>> p is always null.
>>
>> Type t = entityType.GetI nterface(typeof (IPersistent).N ame);
>>
>> if (t != null)
>> {
>> IPersistent p = entityType as IPersistent;
>>
>> // p Is always null.
>> }
>>
>> -Joe
>>[/color]
>
>[/color]

[Bruno Jouhier]

Re: Why isn't this casting?


"Joe" <jbassking@noem ail.noemail> a écrit dans le message de news:
uy6rSiiOGHA.201 2@TK2MSFTNGP14. phx.gbl...[color=blue]
> Bruno,
>
> Does this mean I get the stupid question award for the year?[/color]

Probably not, unfortunately!
[color=blue]
> I can't believe I didn't realize I was trying to cast the type and not the
> object.
>
> Thanks for your clear set of eyes![/color]

You're very welcome.

Bruno.
[color=blue]
>
> -Joe
>
> "Bruno Jouhier" <bjouhier@clu b-internet.fr> wrote in message
> news:44001767$0 $1146$7a628cd7@ news.club-internet.fr...[color=green]
>> You are mixing the "type" and the "instance"
>>
>> In your code, entityType is a type.
>> You probably have a variable like entityInstance that references an
>> instance of entityType, and the "as" operator should be applied to this
>> variable:
>>
>> IPersistent p = entityInstance as IPersistent;
>>
>> Bruno
>>
>> "Joe" <jbassking@noem ail.noemail> a écrit dans le message de news:
>> %23QohlQeOGHA.3 360@TK2MSFTNGP1 5.phx.gbl...[color=darkred]
>>> entityType implements IPersistent and does get into the if statement but
>>> p is always null.
>>>
>>> Type t = entityType.GetI nterface(typeof (IPersistent).N ame);
>>>
>>> if (t != null)
>>> {
>>> IPersistent p = entityType as IPersistent;
>>>
>>> // p Is always null.
>>> }
>>>
>>> -Joe
>>>[/color]
>>
>>[/color]
>
>[/color]