GetType not working on custom assemblies in .NET 2.0

9 Aug 2006 3:41 PM

Gabe Covert

We have just migrated to VS 2005 and .NET 2.0, and are having some problems
wth GetType and a custom class whose assembly resides in the GAC.

In 1.1, we could call, for example:
System.Type.GetType(""ElanHomeProject.ElanControl.ElanKeyPad.Z100,
ElanHomeProject");

This work work just fine, returning the type of that particular class.

Now, in 2.0, that call results in a null Type, and the call only seems to
work if we make the GetType call as so:

System.Type.GetType(""ElanHomeProject.ElanControl.ElanKeyPad.Z100,
ElanHomeProject, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=f50445a37b571e16");

Additionally, a call such as:
Type objType = typeof(ElanHomeProject.ElanControl.ElanKeyPad.Z100);

works in 2.0, but the way our application is built, the type is passed as a
string, so we HAVE to use GetType.

Has anyone else had this problem? Can anyone suggest a solution where we
won't have to pass the Version, Culture and PublicKeyToken?

Thank you in advance!

Gabe

9 Aug 2006 4:37 PM

David Browne

Show quote

"Gabe Covert" <GabeCov***@discussions.microsoft.com> wrote in message
news:19338DBA-A47D-4953-B401-F8AF42A9E0CA@microsoft.com...
> We have just migrated to VS 2005 and .NET 2.0, and are having some
> problems
> wth GetType and a custom class whose assembly resides in the GAC.
>
> In 1.1, we could call, for example:
> System.Type.GetType(""ElanHomeProject.ElanControl.ElanKeyPad.Z100,
> ElanHomeProject");
>
> This work work just fine, returning the type of that particular class.
>
> Now, in 2.0, that call results in a null Type, and the call only seems to
> work if we make the GetType call as so:
>
> System.Type.GetType(""ElanHomeProject.ElanControl.ElanKeyPad.Z100,
> ElanHomeProject, Version=2.0.0.0, Culture=neutral,
> PublicKeyToken=f50445a37b571e16");
>
> Additionally, a call such as:
> Type objType = typeof(ElanHomeProject.ElanControl.ElanKeyPad.Z100);
>
> works in 2.0, but the way our application is built, the type is passed as
> a
> string, so we HAVE to use GetType.
>
> Has anyone else had this problem? Can anyone suggest a solution where we
> won't have to pass the Version, Culture and PublicKeyToken?
>
> Thank you in advance!
>

You can always just examine the loaded assemblies and grab the first type
with a matching name.

EG

    static Type GetType(string name)
    {
      foreach (Assembly a in AppDomain.CurrentDomain.GetAssemblies())
      {
        Type t = a.GetType(name);
        if ( t != null)
          return t;
      }
      return null;
    }

David