Self-hosted WCF within Windows Service

I would like to know, if I need to generate client proxy for self-hosted WCF within Windows Form?

Basically what I'm trying to do is, post Html form to WCF operation. I have checked WCFClientTest to validate that my WCF get picked up including its operations, which it does.

But when I try to po开发者_如何学运维st data to Operation, I get Error 400 Bad Request.

Thanks,