HOUSE OF WEB SERVICES: Accessing Raw SOAP Messages in ASP.NET Web Services

摘要

Web Services exchange XML messages. Most of todays Web Service toolkits do their best to hide this fact from developers, by exposing a Web Services behavior as method invocations against objects instead. But what if you want access to the actual XML being sent on the wire? ASP.NET does not expose raw SOAP messages to a service, but with the built-in extensibility hooks and a little elbow grease, you can gain access to them. But before I begin, let me make an observation about ASP.NET Web Services in general. When you develop Web Services in Visual Studio~(~R) .NET, the tool encourages you to use the ASP.NET plumbing a certain way. Specifically, it prompts you to implement a service as a class that exposes a set of methods marked with the [WebMethod] attribute, auto-generate a corresponding Web Services Description Language (WSDL) description and client proxy code, and then implement a client. However, there are other ways to use the Web Services infrastructure.