Hmmm... Since I haven't yet got a reply, I'm guessing I must've stuffed up my previous post since this interface has changed. Oh well, here goes again..
I am using COM+. I have a simple component I made using Visual Studio 2003 attributed ATL. The component has a single interface, which I designated as the default interface. The interface is defined as follows
object
uuid("3E65DC52-DE6D-4483-91A1-1EAE37E0B375")
dual, helpstring("ICOMPlusWebService Interface")
pointer_default(unique
__interface ICOMPlusWebService : IDispatc
[helpstring("method GetString")] HRESULT GetString([in] BSTR strIn, [out,retval] BSTR* strOut)
}
The component is defined as follows
coclass
default(ICOMPlusWebService)
threading("neutral")
vi_progid("COMPlusWebServiceServer.COMPlusWebServi")
progid("COMPlusWebServiceServer.COMPlusWebSer.1")
version(1.0)
uuid("08FAF7C4-28BA-422F-8988-AE583B12AF73")
helpstring("COMPlusWebService Class"
class ATL_NO_VTABLE CCOMPlusWebService :
public ICOMPlusWebServic
public
CCOMPlusWebService(
DECLARE_PROTECT_FINAL_CONSTRUCT(
HRESULT FinalConstruct(
return S_OK
void FinalRelease()
public
STDMETHOD(GetString)(BSTR strIn, BSTR* strOut)
}
The implementation of its GetString() method is as follows (ie. it takes a string, prepends it with "Hello " and returns the result)
STDMETHODIMP CCOMPlusWebService::GetString(BSTR strIn, BSTR* strOut
tr
CAtlStringW str(L"Hello ")
str += strIn
*strOut = str.AllocSysString()
return S_OK
catch (...
return E_FAIL
I have tested that this component is automation compatible by creating a JScript file that calls it. The JScript file looks as follows
var server = WScript.CreateObject("COMPlusWebServiceServer.COMPlusWebSer.1")
var str = server.GetString("World!!!")
WScript.Echo(str)
When executed, this works fine - ie. displays the string "Hello World!!!"
I then configure my component inside a COM+ server application on Windows XP Service Pack 1. In Component Services, I right click on the COM+ application's properties, go to the "Activation" tab, and check "Uses SOAP". In the "SOAP VRoot:" field, I put COMPWS. This supposedly creates a Web Service wrapping up my COM component so I can call it remotely via a Web Services interface. Looking into IIS, I can see that there is now a new virtual directory called "COMPWS". This virtual directory contains the following files
Default.asp
Default.disc
Web.confi
In addition, it contains a subfolder called "bin" which contains the following file
COMPlusWebServiceServerSoapLib.dl
When I add a Web Reference to another (C#) project referring to this Web Service, the reference gets added OK and all the intellisense works fine, and it compiles properly. However, when I run it, I get the following error
Unhandled Exception: System.Web.Services.Protocols.SoapException: **** System.InvalidCastException - QueryInterface for interface COMPlusWebServiceServerSoapLib.ICOMPlusWebService failed
Also, I tried running the following JScript
var server = GetObject("soap:wsdl=http://localhost/COMPWS/COMPlusWebServiceServer.COMPlusWebSer.1.soap?WSDL";)
var str = server.GetString("World!!!")
WScript.Echo(str)
But I get the following error
Script: <Path to my script
Line:
Char:
Error: QueryInterface for interface COMPlusWebServiceServerSoapLib.ICOMPlusWebService failed
Code: 8000400
Source: COMPlusWebServiceServerSoapLi
ie. It seems to not be able to retrieve the COM component's default interface - ICOMPlusWebService. I thought it might be a security issue, so I set the COM+ application's "Authentication Level for Calls" to "None" and I ran the Permissions Wizard in IIS on the Virtual Directory to make the Virtual Directory publicly available. I ensured the "Directory Security" allows "Anonymous Access", and I even gave "Execute Permissions" to run "Scripts and Executables". But all to no avail - I keep getting the same error
Has anybody else run into this problem? Is it just my machine? Have I missed a configuration option somewhere that I need to set for this to work? Whatever the case may be, putting a Web Service wrapper on a COM+ configured component doesn't seem to be working for me and any help would be much appreciated
Thanks.
