My .NET application needs to connect to an external SOAP service. I let Visual Studio generate the client based on the WSDL description.

The service allows retrying for failed requests, but needs a transaction ID in the soap header in order to detect the repeated calls.

I was able to add the transaction ID by creating a GUID in an IClientMessageInspector. And my plan was to use Polly for retrying.

My problem is: Polly knows nothing about the IClientMessageInspector, and the inspector doesn't know if the request is a retry.

Is there a way to pass that information along, or is there an alternative way of changing the SOAP header? Can Visual Studio be configured to do that?

CodePudding user response：

Found the solution here:

Instead of using IClientMessageInspector, SOAP metadata can be accessed via OperationContextScope(client.InnerChannel). For convenience, this can then be wrapped in a custom proactive Polly policy.