By Scott Short
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Extra resources for Building XML Web Services for the Microsoft .NET Platform
If you are writing the code as you read this chapter, notice that you have full IntelliSense support for the cc object. , the list of methods supported by the object, including the Validate method, will be shown. NET equivalent of the Web service’s parameter types. NET application to expose its business logic via Web services. asmx code-behind file for the Web service. The only code required to expose the method via HTTP is the WebMethod attribute. Once the code is compiled and deployed, any client that supports HTTP and is capable of parsing strings can call the method.
The prefix is appended to any elements defined within the SOAP namespace. These elements are fully qualified. The soap prefix indicates that the Envelope element is an instance of the SOAP Envelope type. I will drill deeper into XML namespaces in the next chapter. SOAP Actors Before I describe the individual parts of a SOAP message, I want to define a couple of terms I will be using. A SOAP actor is anything that acts on the content of the SOAP message. There are two types of SOAP actors, default actors and intermediaries.
It means only that if the message does reach the transaction coordinator intermediary, it must comprehend the TransactionId header entry or throw an error. In the preceding example, the intermediary needs to perform a critical task before the message is routed to the default actor. Recall that if the message does reach the transaction coordinator intermediary, it must remove the TransactionId header before forwarding the message. Therefore, the default actor can check to see whether the TransactionId header exists, which would indicate that the message was not passed through its appropriate intermediaries.