Hi
I have a scenario where I've created another AppDomain to dynamically load a DLL(s) into. In this newly loaded DLL I want to call a static method on a class. The problem arise is that I have the same class/static method definition statictly linked to my EXE and when I call InvokeMember(.. .), even though I got the Type from the new AppDomain, it calls the static method that I am staticly linked to and not the static method in the dynamicly loaded DLL
Does anybody know how to force a static variable call into another AppDomain if there is duplicate definition clashes across domains
I'll appreciate any help. Thank you
Chris 5 4862
Chris,
By domains do you mean namespaces? If you have two seperate namespaces, one
which is your library's, and the other is your programs, then reference your
built in static method like this
this.MyStaticMe thod(...);
but then reference the one in the other namespace like this:
MyDynamicDomain .MyClass.MyStat icMethod(...);
If I've missed the boat, let me know.
Thanks.
Dan.
"Chris" <cp******@hotma il.com> wrote in message
news:FD******** *************** ***********@mic rosoft.com... Hi,
I have a scenario where I've created another AppDomain to dynamically load
a DLL(s) into. In this newly loaded DLL I want to call a static method on a
class. The problem arise is that I have the same class/static method
definition statictly linked to my EXE and when I call InvokeMember(.. .),
even though I got the Type from the new AppDomain, it calls the static
method that I am staticly linked to and not the static method in the
dynamicly loaded DLL. Does anybody know how to force a static variable call into another
AppDomain if there is duplicate definition clashes across domains? I'll appreciate any help. Thank you. Chris
I don't have the original post to reply to, but this is to address the
original post.
Have you tried using the Type.GetMethod( ) and then calling Invoke() on the
MethodInfo object instead? My guess is that theres some confusion, but at
least doing it this way, you can verify the MemberInfo (an ancestor of
MethodInfo) to be sure that it's on the correct type.
My guess is your Type.InvokeMemb er() is getting confused somewhere along the
way.
I had a similar problem a while back and by using the method I outlined, I
was able to track down the original problem with my Type.InvokeMemb er()
call.
Pete
"Daniel Bass" <DanielBass TAKE at OUT CAPS WORDS Postmaster.co.u k> wrote in
message news:%2******** *********@TK2MS FTNGP10.phx.gbl ... Chris,
By domains do you mean namespaces? If you have two seperate namespaces,
one which is your library's, and the other is your programs, then reference
your built in static method like this
this.MyStaticMe thod(...);
but then reference the one in the other namespace like this:
MyDynamicDomain .MyClass.MyStat icMethod(...);
If I've missed the boat, let me know.
Thanks. Dan.
"Chris" <cp******@hotma il.com> wrote in message news:FD******** *************** ***********@mic rosoft.com... Hi,
I have a scenario where I've created another AppDomain to dynamically
load a DLL(s) into. In this newly loaded DLL I want to call a static method on
a class. The problem arise is that I have the same class/static method definition statictly linked to my EXE and when I call InvokeMember(.. .), even though I got the Type from the new AppDomain, it calls the static method that I am staticly linked to and not the static method in the dynamicly loaded DLL. Does anybody know how to force a static variable call into another
AppDomain if there is duplicate definition clashes across domains? I'll appreciate any help. Thank you. Chris
Hi David
Thank you for the link and although I've been through, I reread it to see if I missed anything the first time. What you describing is completely correct and it is exactly what I've done. Over the weekend I've written a small application and dlls to simulate the situation. I tried to incorporate all the suggestions that everybody has given me (thanks all!) but I can't seem to be able to call the static method in the other domain. First I thought it was a name clash, ie both AppDomain (current and loaded) has the same signature and the static method in the current AppDomain is callled only, but I found that I couldn't even call the static method in the loaded AppDomain under a new name
If anybody has any further suggestions on how to call a static method in another (dynamicly loaded) AppDomain, please let me know. Pretty please...
Thank yo
Chris Mouto
----- David Levine wrote: ----
The problem is that even though you are creating a new appdomain you ar
still calling it from the context of the default appdomain. You need t
create an object derived from MarshalByRefObj , create an instance of it i
the new appdomain and then via remoting into the new appdomain call a metho
in it that will create the object and then call its method. This link does
good job of describing things, and you can google up a bunch of sample cod
pretty easily http://www.gotdotnet.com/team/clr/AppdomainFAQ.asp
"Chris Mouton" <an*******@disc ussions.microso ft.com> wrote in messag
news:5B******** *************** ***********@mic rosoft.com.. Hi Dan Thank you for replying. No when I mean domain, I mean AppDomain. Here i
the sample code of the DLL that I am loading and the method that I'
calling AppDomainSetup setup = new AppDomainSetup( ) setup.Applicati onBase = someDirectory AppDomain appDomain = AppDomain.Creat eDomain("Sample Domain", null, setup) Common.SampleIn terface convertedClass = (Common.SampleI nterface appDomain.Creat eInstanceAndUnw rap "SampleDLL" "SampleDLL.Samp leDLLClass") Assembly[] assemblies = appDomain.GetAs semblies() Type type = assemblies[1].GetType("Sampl eNamespace.Samp leClass", true
false) type.InvokeMemb er("Initialize ,BindingFlags.P ublic | BindingFlags.In vokeMethod | BindingFlags.St ati ,nul ,nul ,new Object[] {}) When this code is executed, the Initialize on my SampleClass from staticl
linked DLL is called. I know this because I can have check code in th
SampleClass that says that it has not been initialized and if I look at th
Output window when in debugging mode, I can view that the wrong assemblie
are being loaded Does this help clarify the problem Kind Regard Chris Mouto ----- Daniel Bass wrote: ---- Chris By domains do you mean namespaces? If you have two seperat
namespaces, on which is your library's, and the other is your programs, the
reference you built in static method like thi this.MyStaticMe thod(...) but then reference the one in the other namespace like this MyDynamicDomain .MyClass.MyStat icMethod(...) If I've missed the boat, let me know Thanks Dan "Chris" <cp******@hotma il.com> wrote in messag news:FD******** *************** ***********@mic rosoft.com.. Hi I have a scenario where I've created another AppDomain t
dynamically loa a DLL(s) into. In this newly loaded DLL I want to call a stati
method on class. The problem arise is that I have the same class/static metho definition statictly linked to my EXE and when I cal
InvokeMember(.. .) even though I got the Type from the new AppDomain, it calls th
stati method that I am staticly linked to and not the static method in th dynamicly loaded DLL. Does anybody know how to force a static variable call into another AppDomain if there is duplicate definition clashes across domains? I'll appreciate any help. Thank you. Chris
I haven't tried calling a static method except indirectly when I used
ExecuteAssembly (this invokes the static Main method in the executed
assembly). Invoking an instance method was no problem at all. From your
sample code it appears that you are still not invoking the method in the
context of the remote appdomain. You should define a class, derived from
MBRO, that implements the functionality you are using directly from the
default appdomain. The code you show here...
Assembly[] assemblies = appDomain.GetAs semblies();
Type type = assemblies[1].GetType("Sampl eNamespace.Samp leClass", true,
false);
type.InvokeMemb er("Initialize "
,BindingFlags.P ublic | BindingFlags.In vokeMethod | BindingFlags.St atic
,null
,null
,new Object[] {});
....I assume you are executing from the default appdomain. By loading a type
into the default appdomain you are loading up all the assemblies as well
into the default appdomain, and it will try to execute the method in the
default appdomain. Create a method in convertedClass and move this code
into it so that when it call the method the code is executing remotely, and
call the method via the unwrapped object handle.
This wont necessarily solve the apparent problem of not calling the static
method. What error do you get? Are any exceptions thrown?
You can also try to use AppDomian.DoCal lback(). This should invoke the
method in the context of the other appdomain. Again, I haven't used it with
static methods.
"Chris Mouton" <cp******@hotma il.com> wrote in message
news:3D******** *************** ***********@mic rosoft.com... Hi David,
Thank you for the link and although I've been through, I reread it to see
if I missed anything the first time. What you describing is completely
correct and it is exactly what I've done. Over the weekend I've written a
small application and dlls to simulate the situation. I tried to incorporate
all the suggestions that everybody has given me (thanks all!) but I can't
seem to be able to call the static method in the other domain. First I
thought it was a name clash, ie both AppDomain (current and loaded) has the
same signature and the static method in the current AppDomain is callled
only, but I found that I couldn't even call the static method in the loaded
AppDomain under a new name. If anybody has any further suggestions on how to call a static method in
another (dynamicly loaded) AppDomain, please let me know. Pretty please.... Thank you Chris Mouton
----- David Levine wrote: -----
The problem is that even though you are creating a new appdomain you
are still calling it from the context of the default appdomain. You need
to create an object derived from MarshalByRefObj , create an instance of
it in the new appdomain and then via remoting into the new appdomain call a
method in it that will create the object and then call its method. This link
does a good job of describing things, and you can google up a bunch of
sample code pretty easily.
http://www.gotdotnet.com/team/clr/AppdomainFAQ.aspx
"Chris Mouton" <an*******@disc ussions.microso ft.com> wrote in message news:5B******** *************** ***********@mic rosoft.com... >> Hi Dan, >> Thank you for replying. No when I mean domain, I mean AppDomain.
Here is the sample code of the DLL that I am loading and the method that I'm calling: > AppDomainSetup setup = new AppDomainSetup( ); > setup.Applicati onBase = someDirectory; > AppDomain appDomain = AppDomain.Creat eDomain("Sample Domain", null,
setup); >> Common.SampleIn terface convertedClass = (Common.SampleI nterface) > appDomain.Creat eInstanceAndUnw rap( > "SampleDLL" , > "SampleDLL.Samp leDLLClass"); >> Assembly[] assemblies = appDomain.GetAs semblies(); > Type type = assemblies[1].GetType("Sampl eNamespace.Samp leClass",
true, false); > type.InvokeMemb er("Initialize " > ,BindingFlags.P ublic | BindingFlags.In vokeMethod |
BindingFlags.St atic > ,null > ,null > ,new Object[] {}); >> When this code is executed, the Initialize on my SampleClass from
staticly linked DLL is called. I know this because I can have check code in
the SampleClass that says that it has not been initialized and if I look
at the Output window when in debugging mode, I can view that the wrong
assemblies are being loaded. >> Does this help clarify the problem? >> Kind Regards > Chris Mouton >> ----- Daniel Bass wrote: ----- >> Chris, >> By domains do you mean namespaces? If you have two seperate namespaces, one > which is your library's, and the other is your programs, then reference your > built in static method like this >> this.MyStaticMe thod(...); >> but then reference the one in the other namespace like this: >> MyDynamicDomain .MyClass.MyStat icMethod(...); >>> If I've missed the boat, let me know. >> Thanks. > Dan. >>> "Chris" <cp******@hotma il.com> wrote in message > news:FD******** *************** ***********@mic rosoft.com... >> Hi, >>> I have a scenario where I've created another AppDomain to dynamically load > a DLL(s) into. In this newly loaded DLL I want to call a
static method on a > class. The problem arise is that I have the same class/static
method > definition statictly linked to my EXE and when I call InvokeMember(.. .), > even though I got the Type from the new AppDomain, it calls
the static > method that I am staticly linked to and not the static method
in the > dynamicly loaded DLL. >>> Does anybody know how to force a static variable call into
another > AppDomain if there is duplicate definition clashes across
domains? >>> I'll appreciate any help. Thank you. >> Chris >>>
I think you should use .Net Remoting.
You may find a technical overview here: http://msdn.microsoft.com/library/de...us/dndotnet/ht
ml/hawkremoting.as p
"Microsoft® .NET remoting provides a framework that allows objects to
interact with one another across application domains."
Regards,
Adrian Vinca [MSFT], Developer Division
--------------------------------------------------------------------
This reply is provided "AS IS", without warranty (express or implied).
Note: For the benefit of the community-at-large, all responses to this
message are best directed to the newsgroup/thread from which they
originated. Hi,
I have a scenario where I've created another AppDomain to dynamically load
a DLL(s) into. In this newly loaded DLL I want to call a static method on a
class. The problem arise is that I have the same class/static method
definition statictly linked to my EXE and when I call InvokeMember(.. .),
even though I got the Type from the new AppDomain, it calls the static
method that I am staticly linked to and not the static method in the
dynamicly loaded DLL.
Does anybody know how to force a static variable call into another
AppDomain if there is duplicate definition clashes across domains?
I'll appreciate any help. Thank you.
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