How to instance type of configuration

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Enosh Chang - 13 Oct 2006 17:25 GMT

Hi all:

I saw there is one line on configuration file as following,

<add name="MyProfileProvider"
connectionStringName="MyDatabase"
applicationName="/"
type="System.Web.Profile.SqlProfileProvider, System.Web" />

I want to know how to instance type in my code. Thanks!

Best Regards
Enosh Chang

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Carl Daniel [VC++ MVP] - 13 Oct 2006 17:33 GMT

> Hi all:
>
[quoted text clipped - 6 lines]
>
> I want to know how to instance type in my code. Thanks!

I think you're asking how to create an instance of a type knowing only the
name of the type. In that case:

Type ty = Type.GetType(
"System.Web.Profile.SqlProfileProvider, System.Web"
);
System.Web.SqlProfileProvider prov
= (System.Web.SqlProfileProvider)Activator.CreateInstance(ty);

If that wasn't what you were looking for, post back with a more detailed
question.

-cd

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Massimo - 13 Oct 2006 17:41 GMT

>> I saw there is one line on configuration file as following,
>>
[quoted text clipped - 13 lines]
> System.Web.SqlProfileProvider prov
> = (System.Web.SqlProfileProvider)Activator.CreateInstance(ty);

You probably should use an interface or an abstract class here: if you're
reading the type name from a configuration file, chanches are you just don't
know the actual type of the object, so you can't give a type to "prov".

Massimo

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Enosh Chang - 14 Oct 2006 00:26 GMT

"Massimo" <barone@mclink.it>
???????:%23LFqsZu7GHA.4084@TK2MSFTNGP05.phx.gbl...

>>> I saw there is one line on configuration file as following,
>>>
[quoted text clipped - 20 lines]
>
> Massimo

That's so great. But I encounter another problem that it displays "Could not
load file or assembly 'XXXXX' or one of its dependencies" for some types.
How to solve this problem, dynamic loading assemblies?

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How to instance type of configuration

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