GetType and Interfaces

[Grande]

Hi all,

I'm trying to use GetType to get an Interface, but it's not working?
Is there a special way you have to do this, since it's an Interface
(rather than a complete class)?

Code:
Type SpecDataType = SpecData.GetTyp e();
string strTemp = "SCG.Persistenc e.Interfaces.Pr oduct.I" +
SpecDataType.Na me + "Dao";
//string strTemp = "I" + SpecDataType.Na me + "Dao";
Type SpecDataInterfa ceType = Type.GetType(st rTemp);

Thanks!

[Jon Skeet [C# MVP]]

Re: GetType and Interfaces

Grande <matt.grande@gm ail.comwrote:

I'm trying to use GetType to get an Interface, but it's not working?
Is there a special way you have to do this, since it's an Interface
(rather than a complete class)?
>
Code:
Type SpecDataType = SpecData.GetTyp e();
string strTemp = "SCG.Persistenc e.Interfaces.Pr oduct.I" +
SpecDataType.Na me + "Dao";
//string strTemp = "I" + SpecDataType.Na me + "Dao";
Type SpecDataInterfa ceType = Type.GetType(st rTemp);

Could you post a short but complete program which demonstrates the
problem?

See http://www.pobox.com/~skeet/csharp/complete.html for details of
what I mean by that.

Note that Type.GetType needs the full assembly name (version
information etc) unless you're getting a type from the calling assembly
or mscorlib.

--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Stanimir Stoyanov]

RE: GetType and Interfaces

Hello Grande,

The Type.GetType method requires you to type the Assembly fully qualified
name of the Type, which means you have to include the assembly name, version,
culture and public key token (if any). For instance,
"System.Int 32, mscorlib, Version=2.0.0.0 , Culture=neutral ,
PublicKeyToken= b77a5c561934e08 9" to obtain the Type.Int32 instance from .NET
Framework v2.0.

--
Best regards,

Stanimir Stoyanov
admin@nospam.st oyanoff.info


"Grande" wrote:

Hi all,
>
I'm trying to use GetType to get an Interface, but it's not working?
Is there a special way you have to do this, since it's an Interface
(rather than a complete class)?
>
Code:
Type SpecDataType = SpecData.GetTyp e();
string strTemp = "SCG.Persistenc e.Interfaces.Pr oduct.I" +
SpecDataType.Na me + "Dao";
//string strTemp = "I" + SpecDataType.Na me + "Dao";
Type SpecDataInterfa ceType = Type.GetType(st rTemp);
>
Thanks!
>
>

[Jon Skeet [C# MVP]]

RE: GetType and Interfaces

Stanimir Stoyanov <admin@nospam.s toyanoff.infowr ote:

The Type.GetType method requires you to type the Assembly fully qualified
name of the Type, which means you have to include the assembly name, version,
culture and public key token (if any). For instance,
"System.Int 32, mscorlib, Version=2.0.0.0 , Culture=neutral ,
PublicKeyToken= b77a5c561934e08 9" to obtain the Type.Int32 instance from .NET
Framework v2.0.

Note that that's only true if the type isn't in the calling assembly or
mscorlib. For example, Type.GetType ("System.Int32" ) will work fine for
your example, as Int32 is in mscorlib.

--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Stanimir Stoyanov]

RE: GetType and Interfaces

Thank you for pointing this out, Jon.
--
Best regards,

Stanimir Stoyanov
admin@nospam.st oyanoff.info


"Jon Skeet [C# MVP]" wrote:

Stanimir Stoyanov <admin@nospam.s toyanoff.infowr ote:

The Type.GetType method requires you to type the Assembly fully qualified
name of the Type, which means you have to include the assembly name, version,
culture and public key token (if any). For instance,
"System.Int 32, mscorlib, Version=2.0.0.0 , Culture=neutral ,
PublicKeyToken= b77a5c561934e08 9" to obtain the Type.Int32 instance from .NET
Framework v2.0.

>
Note that that's only true if the type isn't in the calling assembly or
mscorlib. For example, Type.GetType ("System.Int32" ) will work fine for
your example, as Int32 is in mscorlib.
>
--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too
>

[Leon Lambert]

Re: GetType and Interfaces

Grande wrote:

Hi all,
>
I'm trying to use GetType to get an Interface, but it's not working?
Is there a special way you have to do this, since it's an Interface
(rather than a complete class)?
>
Code:
Type SpecDataType = SpecData.GetTyp e();
string strTemp = "SCG.Persistenc e.Interfaces.Pr oduct.I" +
SpecDataType.Na me + "Dao";
//string strTemp = "I" + SpecDataType.Na me + "Dao";
Type SpecDataInterfa ceType = Type.GetType(st rTemp);
>
Thanks!
>

Not exactly sure what you want but the following works for me.
It gets the interface 2 ways. The first way is if it is part of the
loaded assembly. The second is if you used reflection to load an
assembly like Assembly.LoadFr om and want to get the interface from it.
Note in both cases you have to use the fully qualified name including
the namespace.

namespace TestNamespace
{
interface TestInterface
{
void DoSomething();
}
class TestClass
{
[STAThread]
static void Main(string[] args)
{
Type ts = Type.GetType("T estNamespace.Te stInterface");
Assembly asem = ts.Assembly;
Type ts2 = asem.GetType("T estNamespace.Te stInterface");
}
}
}