What kind of client are you talking about? Please post a simple client that
illustrates the issue.
If the COM out-proc server ends it's because it stops running for a reason
known by the server not because of the client.
What happens if you create an instance of say Excel or Word from the same
client?
Willy.
"jwang" <jw***@newsgroups.nospamwrote in message
news:OX****************@TK2MSFTNGP06.phx.gbl...
|I have been calling the application in VB6 suing CreateObject(). It always
| works as expected.
|
| I do not explicitly set the thread. Is that something I should do? I
just
| attempt to write a C# class that invokes that COM server.
|
| It seems that the reference to the COM server is lost when CreateInstnace
| returns. Just do not know what has caused that.
|
| Thanks.
| jwang
|
|
|
|
|
| "Phil Wilson" <pd*******@nospam.cox.netwrote in message
| news:%2****************@TK2MSFTNGP06.phx.gbl...
| Is it possible that the managed object is being garbage collected and
| releasing references? Then the COM server just goes away.
| --
| Phil Wilson
| [Microsoft MVP-Windows Installer]
| "Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrote
| in message news:O0**************@TK2MSFTNGP06.phx.gbl...
| >jwang,
| >>
| > This does not indicate an issue with .NET, but rather, the COM
server
| >(which is out of process) is being shut down.
| >>
| > If you try and create the object through say, vb script, do you get
| >the same result?
| >>
| > Also, what do you have the ApartmentState set to on your thread?
| >>
| >>
| >--
| > - Nicholas Paldino [.NET/C# MVP]
| > -
mv*@spam.guard.caspershouse.com
| >>
| >"jwang" <jw***@newsgroups.nospamwrote in message
| >news:On****************@TK2MSFTNGP03.phx.gbl...
| >>Nicholas,
| >>Thanks for responding to my question.
| >>>
| >>CreateInstance does not throw an exception, and it returns a
| >>System._ComObject. The COM component I try to invoke is a
| >>out-of-process component. From the Task Manager, I can see it was
| >>created and then went away. (I used the same method on
| >>Excel.Application, it works fine.)
| >>>
| >>Also, I try with ComImport to explicitly import the type, and then use
| >>new to instantiate the component, but get the same problem.
| >>>
| >>jwang
| >>>
| >>>
| >>"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.com>
wrote
| >>in message news:OO**************@TK2MSFTNGP05.phx.gbl...
| >>>jwang,
| >>>>
| >>> Either CreateInstance should throw, or return a value. What is
the
| >>>exception that is being thrown? I doubt it is
NullReferenceException.
| >>>>
| >>>>
| >>>--
| >>> - Nicholas Paldino [.NET/C# MVP]
| >>> -
mv*@spam.guard.caspershouse.com
| >>>>
| >>>"jwang" <jw***@newsgroups.nospamwrote in message
| >>>news:%2****************@TK2MSFTNGP06.phx.gbl. ..
| >>>>>I am trying to instantiate a COM component in C# via late binding.
The
| >>>>>component appears to be launched, then it automatically gets
unloaded.
| >>>>>That is, the instance is unloaded after the CreateInstance returns.
| >>>>>
| >>>>Any idea of what could be the problem? Thanks a lot.
| >>>>>
| >>>>Here is the code segment I am using:
| >>>>>
| >>>>Object target;
| >>>>>
| >>>>Type oType = Type.GetTypeFromProgID("my.application", true);
| >>>>if (oType != null)
| >>>>>
| >>>>{
| >>>>>
| >>>> target = Activator.CreateInstance(oType);
| >>>>>
| >>>> if (target != null)
| >>>>>
| >>>> {
| >>>>>
| >>>> success = true;
| >>>>>
| >>>> }
| >>>>>
| >>>>}
| >>>>>
| >>>>>
| >>>>
| >>>>
| >>>
| >>>
| >>
| >>
| >
| >
|
|
