Problem with using AppDomain/Assembly Loading in Queued Component

microsoft.public.dotnet.framework

18 Oct 2006 6:43 PM

xiaohongvz

Hi,

After many searches online and cannot find the right solution for my
issue, I decided to post my question here. If you can help or know
something on this, please give me some hints? Thanks in advance !

ISSUE:

I have a queued component ( COM+ serviced component and written in C#)
that needs to load my .NET assembly dynamically into the AppDomain.
Code goes like this:

AppDomain newAppDomain = new AppDomain ();
newAppDomain.CreateInstanceAndUnwrap("myClassName","myProjectNameSpace.myClass");
*** Note: myClass assembly is C# and I generated tlb for it and loaded
the assembly into GAC and registry (via regasm). ***

When running this queued component, I always got error
"System.IO.FileNotFoundException: File or assembly name myClassName, or
one of its dependencies, was not found." Looks like DLLHOST is looking
into C:\WINDOWS\system32\ for my dll while my dll is actually in
another directory (Note: the dll of queued component and my assembly
are in same bin directory). What needs to be done to avoid this error ?

Some error log:

System.IO.FileNotFoundException: File or assembly name myClassName, or
one of its dependencies, was not found.
File name: "myClassName"

Server stack trace:
   at System.Reflection.Assembly.nLoad(AssemblyName fileName, String
codeBase, Boolean isStringized, Evidence assemblySecurity, Boolean
throwOnFileNotFound, Assembly locationHint, StackCrawlMark& stackMark)
   at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef,
Boolean stringized, Evidence assemblySecurity, StackCrawlMark&
stackMark)
   at System.Reflection.Assembly.InternalLoad(String assemblyString,
Evidence assemblySecurity, StackCrawlMark& stackMark)
   at System.Activator.CreateInstance(String assemblyName, String
typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder,
Object[] args, CultureInfo culture, Object[] activationAttributes,
Evidence securityInfo, StackCrawlMark& stackMark)
   at System.Activator.CreateInstance(String assemblyName, String
typeName)
   at System.AppDomain.CreateInstance(String assemblyName, String
typeName)
   at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName,
String typeName)
   at
System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(MethodBase
mb, Object[] args, Object server, Int32 methodPtr, Boolean
fExecuteInContext, Object[]& outArgs)
   at
System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage
msg, Int32 methodPtr, Boolean fExecuteInContext)

Exception rethrown at [0]:
   at
System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage
reqMsg, IMessage retMsg)
   at
System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&
msgData, Int32 type)
   at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName,
String typeName)
   at myClassName.MyMethod..ctor()

=== Pre-bind state information ===
LOG: DisplayName = myClassName
(Partial)
LOG: Appbase = C:\WINDOWS\system32\
LOG: Initial PrivatePath = NULL
Calling assembly : (Unknown).
===

LOG: Application configuration file does not exist.
LOG: Policy not being applied to reference at this time (private,
custom, partial, or location-based assembly bind).
LOG: Post-policy reference: myClassName
LOG: Attempting download of new URL
file:///C:/WINDOWS/system32/myClassNameDLL.
LOG: Attempting download of new URL
file:///C:/WINDOWS/system32/xhparser/myClassName.DLL.
LOG: Attempting download of new URL
file:///C:/WINDOWS/system32/myClassName.EXE.
LOG: Attempting download of new URL
file:///C:/WINDOWS/system32/xhparser/myClassName.EXE.

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