Not sure which category this falls in, but I will start here.
I have built a web service that wraps a FoxPro DLL. I know a little about
COMInterop and I am having a difficult time finding resources to learn
more.
What I did was install the FoxPro dll on my local machine, which is my
development machine running IIS 5.0. I then created a COM+ package for the
dll. I next created my web service and added a reference to the FoxPro
dll. Doing this added a Interop."dllname".dll file to my bin directory.
The FoxPro object is basically a series of properties and then a method
call. I build the objects state through the property calls and then I call
a method, in this case the method is called 'post'. 50% of the time the
post method works, 50% it does not and I rteceive a page cannot be found
error, #500. When I say 'it works', I receive the expected results from
the method call.
I added a watch to my foxpro instance and I keep seeing the following 100%
of the time:
Parent <error: an exception of type:
{System.Runtime.InteropServices.COMException} occurred> Integer
Not having an in depth knowledge of COMInterop and what .NET is doing for
me under the covers, this error bugs me as well as the 50% of the time the
method call fails and I receive HTTP 500 - Internal server error Internet
Explorer.
Any feedback or pointers to a good resource would be greatly appreciated.
Greg Robinson
Director of Training and .NET Technologies
Scribble Software
www.scribblesoftware.com
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