Came across an issue today where we want to be able to read WCF service
and client configuration from a custom location. That’s actually more
difficult than you’d think.
By default, WCF configuration is stored in your app.config (or
web.config) file in the <system.serviceModel>
you create a client (like with
or a service
the application configuration file gets read, the contents get parsed
into the appropriate strong types, and “magic happens” - the appropriate
object is created.
In our situation, we wanted to do exactly that, but in a Powershell
script… and that’s a problem, because the only way we could get WCF to
see the configuration was to actually create a Powershell.exe.config
file in the Powershell installation directory, run the script, and then
remove the configuration. Not so great. We needed the ability to say,
“Hey, WCF, use the configuration file that we explicitly specify.”
That, as I said, is a little more difficult than you’d think.
A lot of searching led me to two articles:
I agree, the titles don’t necessarily sound like they’d help much, but
they do. They even include source for how to do this so you can see what
I’m talking about. That said, I’ll summarize the steps here.
For service hosting, what it boils down to is:
For clients, it’s slightly more work:
- Create a custom class deriving from
- Override the protected CreateDescription
the override, you need to…
- Call base.CreateDescription().
- Read in your custom configuration.
- Create a custom
based on your configuration. Don’t forget the bindings,
behaviors, etc. (That’s what makes this hard.)
- Return that custom ServiceEndpoint.
Once you do that, you’re set - you can create a standalone XML
configuration file with the <system.serviceModel> section and point
WCF at that rather than having to store the configuration in the default
app.config/web.config. You are limited to using your custom service host
and client classes, but then, if you’re getting into things this deep
you’re probably not afraid of getting your hands dirty.
Again, both of those articles contain full source to the solutions so
you can see how it works. Check ‘em out.