将WCF服务添加到项目中

Question

I have a C# WinForms Project which contains some WCF service definition files which I have created in the project by adding standard classes (not using Add Item > WCF Service).

The project contains some dependencies that require me to build the project for x86 processors.

If I edit the app.config file with the WCF Service Configuration Editor and try to use the "Create New Service ..." wizard, and then browse to the project EXE file (in the debug folder) I get an error, (which I've read is because I'm targeting the x86 processor):

Could not load file or assembly 'EXE_FILE_NAME' or one of its dependencies. An attempt was made to load a program with an incorrect format.

So, upon changing the target to All CPUs, compiling the project again, and then trying to create the service in the WCF Service Configuration Editor again, I now get a different error:

Could not load file or assembly 'SOLUTION_NAME, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.

(To clarify, I CAN still compile the project when targeting all CPUs, but get an error at runtime due to a dependency)

Is anybody able to help me with this problem, so I can add the services defined in app.config file using the wizards in WCF Service Configuration Editor? (I think that if I add the services to the WCF Service Configuration Editor when targeting All CPUs I can make any modifications thereafter, regardless of the target)

Answer 1

When debugging, look at the exception detail. From what you've described my guess is you will an assembly loading error in the fusion log because the dependencies of the WCF service can't be satisfied by looking in the default locations.

Say for example you're referencing MrCritter.MyService.dll which defines a WCF service and has a dependency on something like log4net or nHibernate. As long as nothing from those dependencies is leaking into the WCF host (eg returning an ILog) yes you'll be able to compile fine but will get ReflectionTypeLoadException thrown when trying to instantiate the service class if those dependencies aren't somewhere it can find (eg in the executing directory, in GAC etc).