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Friday, August 15, 2008 5:00 AM

Using Faults with Untyped Messages

When using a typed contract, incoming messages on the server are shredded on your behalf to be turned into method calls and parameters. Ordinarily, the particular method call selected for an application messages will have the same parameterized contract
Posted by Nicholas Allen | 1 Comments
Monday, August 11, 2008 5:00 AM

Getting Rid of Namespaces

How do I write a contract for a wrapped message in the default namespace? I've written a quick sample to demonstrate what happens when you write the contract without taking any namespaces into account. [ServiceContract] public interface IService { [OperationContract]
Posted by Nicholas Allen | 1 Comments
Tuesday, August 05, 2008 5:00 AM

System Types in Metadata

It's bad practice to use system types when defining an operation contract. A system type is often a complex composition of primitive types that has no direct analog in other implementations. By using a system type, you bind your service to the particular
Posted by Nicholas Allen | 2 Comments
Wednesday, July 30, 2008 5:00 AM

Avoiding Address Filters

The address filter mode that we looked at last time solved the problem of funneling all of the messages with a given prefix address to our service instance. Changing the filter mode still left us with the problem of dispatching from that universal contract
Posted by Nicholas Allen | 0 Comments
Friday, July 11, 2008 5:00 AM

Naming Contracts for Versioning

Some tips for building support for versioning into the naming of data contracts. First, the primary route for versioning should be through the namespace part of the contract rather than the member name part of the contract. Versioning the contract through
Posted by Nicholas Allen | 1 Comments
Monday, May 19, 2008 5:00 AM

Pointing to External Metadata

I've previously talked about using WSDL extensions to provide custom modifications to the WSDL import and export process. Making modifications to an existing WSDL document or to the existing WSDL processing is a great way to make small changes when the
Posted by Nicholas Allen | 1 Comments
Friday, May 09, 2008 5:00 AM

Setting the Configuration Name

What's the difference between the Name and ConfigurationName on service contracts and behaviors? The Name property sets the name of the service in metadata while the ConfigurationName property sets the name of the service in configuration. Metadata is
Posted by Nicholas Allen | 2 Comments
Monday, May 05, 2008 5:00 AM

Private Data Members

Why does a data contract with private or internal members generate a proxy with public fields? The obvious answer is that the representation for data contracts doesn't contain information about member visibility but that just leads to the question of
Posted by Nicholas Allen | 1 Comments
Monday, March 10, 2008 5:00 AM

Configuring Protection Level

Is it possible to configure the protection level for message parts at runtime? Only certain configurations make doing this particularly easy. When using transport security with Windows credentials, the WindowsStreamSecurityBindingElement allows you to
Posted by Nicholas Allen | 5 Comments
Friday, February 22, 2008 5:00 AM

DataMember Best Practices

I was asked to share a list of best practices I wrote for data contracts and data members so here it is: Do apply the DataMember attribute only to properties rather than the corresponding fields. Do not use type inheritance to version a data contract.
Posted by Nicholas Allen | 3 Comments
Monday, February 18, 2008 5:00 AM

Scopes of Encryption

This article is primarily an introduction on protecting message data since the topic overall seems to cause some confusion. The source of confusion is what it means for a service to define a contract for protecting data. Data protection flows from two
Posted by Nicholas Allen | 1 Comments
Thursday, January 31, 2008 5:00 AM

Differences in Guid Serialization

Why do the guids in my contract turn into strings when generating a client? You're probably mixing different types of serializers between the client and service. There's nothing wrong with this and the generated client will work correctly but you don't
Posted by Nicholas Allen | 5 Comments
Friday, January 25, 2008 5:00 AM

Importing and Exporting WSDL Annotations

How do I add custom annotations to the contracts that are generated from WSDL? You first need to start with an IWsdlImportExtension. Your extension gets called each time a contract is discovered during import. Processing happens in multiple passes so
Posted by Nicholas Allen | 2 Comments
Wednesday, December 05, 2007 5:00 AM

Detecting Metadata

How do I figure out during dispatch whether a request is destined to be a metadata request or a normal application request? The reason you might care whether a request in flight is for metadata or not is because of security policy. You might want to permit
Posted by Nicholas Allen | 1 Comments
Wednesday, November 14, 2007 5:00 AM

Policy Primer Finalized

After six weeks of comments and editing the primer on WS-Policy 1.5 that I mentioned earlier has been published by the working group. The primer is an explanation of how to use policy with web services along with best practice guidelines for policy authors.
Posted by Nicholas Allen | 0 Comments
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