Larry Smith wrote:
> Hi there,
>
> When I run the following on my app's primary thread:
>
> System.Type.GetType("System.Windows.Forms.Form")
>
> It works as expected. If I then launch a thread via the "BackgroundWorker"
> class immediately after the above call, and invoke the above again as soon
> as the thread starts, it now returns null instead. Can anyone explain
> this. Thanks.

"Tom Porterfield" <tpporter@mvps.org> wrote in message
news:u0VilOZFHHA.924@TK2MSFTNGP02.phx.gbl...
> Larry Smith wrote:
>> Hi there,
>>
>> When I run the following on my app's primary thread:
>>
>> System.Type.GetType("System.Windows.Forms.Form")
>>
>> It works as expected. If I then launch a thread via the
>> "BackgroundWorker"
>> class immediately after the above call, and invoke the above again as
>> soon
>> as the thread starts, it now returns null instead. Can anyone explain
>> this. Thanks.
>
> Change the call to System.Type.GetType("System.Windows.Forms.Form", true);
>
> This change will cause it to throw an exception if it can't determine the
> type. The details in the exception might give you an indication as to
> what is going wrong.

Larry Smith <no_spam@_nospam.com> wrote:
> When I run the following on my app's primary thread:
>
> System.Type.GetType("System.Windows.Forms.Form")
>
> It works as expected. If I then launch a thread via the "BackgroundWorker"
> class immediately after the above call, and invoke the above again as soon
> as the thread starts, it now returns null instead. Can anyone explain this.

> I would expect the above call to return null in either thread,
> personally - Type.GetType(string) only looks in the currently executing
> assembly and mscorlib unless the assembly details are specified.

> In the real code, are you doing this with a string variable instead of
> the hard-coded type name? If you only ever want to find the above type,
> just use typeof(System.Windows.Forms.Form).

Larry Smith <no_spam@_nospam.com> wrote:
> > I would expect the above call to return null in either thread,
> > personally - Type.GetType(string) only looks in the currently executing
> > assembly and mscorlib unless the assembly details are specified.
>
> It does work on the main thread but fails on the worker thread as noted.

> > In the real code, are you doing this with a string variable instead of
> > the hard-coded type name? If you only ever want to find the above type,
> > just use typeof(System.Windows.Forms.Form).
>
> No. I'm actually reading the type on-the-fly from a file. I only have the
> fully-qualfied path name to work with as a string
> ("FullNamespace.ClassName"). I need to generate the assembly-qualified name
> from this however. It will always be a native .NET type. Can you steer me in
> the right direction. Thanks very much.

>>> When I run the following on my app's primary thread:
>>> System.Type.GetType("System.Windows.Forms.Form")
>>>
>>> It works as expected. If I then launch a thread via the
>>> "BackgroundWorker"
>>> class immediately after the above call, and invoke the above again
>>> as
>>> soon
>>> as the thread starts, it now returns null instead. Can anyone