I have had considerable trouble adding a WCF 4.0 application as a data source within SharePoint Designer. I am able to connect to the WCF service as a SOAP Service Connection and find the available operations. However, I am unable to add any Parameters to the method. In example, I have a simple WCF service that serves as an abstraction layer for any data connection. I am able to pass it a ConnectionString and SQL Statement and it will hit any of the hundreds of databases we have on-premises. This works ALL DAY LONG when I leverage Powershell or another Web Application utilizing the WCF service.
If I am not able to pass any parameters, then I am dead in the water . . . has anyone ran into this before?
It seems that the issue is in how Sharepoint is able to read the WCF service. It is able to parse the methods, but not retrieve the required parameters. I know I could convert this to XML Web Services, but that seems like a backwards step here.