问题
Microsofts's WCF is easy to work with when you create Web services where each message has it's own Web method. WCF generates all of the WSDL and everything is easy.
What I want to do is have one Web method that accepts multiple different messages (I don't want to add a mew method every time I add a new message type). The messages themselves will have header information that identify the message type. Once I know the message type, I'll know the structure of the rest of the message.
The only way I've found to do this with WCF is to have the method accept a string, which I parse in as XML and and use. However, I can see no clear way to publish the various message types in the WSDL; so, the whole service is essentially undocumented.
Anyone know of a technique to use in WCF?
回答1:
You can write an operation contract that accepts any message by setting the Action to * and having it take in a Message object:
[ServiceContract]
public interface IMessageContract
{
[OperationContract(Action = "*", ReplyAction = "*")]
Message ProcessRequest(Message request);
}
The Message object gives you access to the headers and has methods to deserialize the body.
To export your own WSDL, you will need to implement IWsdlExportExtension on a contract behavior or operation behavior and attach it to your service. This will give you access to a WsdlExporter, and you can create a ContractDescription yourself and call ExportContract to have it appear in the generated WSDL.
来源：https://stackoverflow.com/questions/3166313/wcf-web-method-that-accepts-different-message-types