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POWCF WSDL IWsdlExportExtension nillable
 

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    <p>I found this service host here at SO (http://stackoverflow.com/questions/5801128/flat-wsdl-for-wcf-4-service) and I have used it to pin point a property of a class that I want to be nillable=false instead of the default true. I managed to do that but now need to implement some logic to automate this feature.</p> <p>Host:</p> <pre><code>using System; using System.Collections; using System.Collections.Generic; using System.ServiceModel.Channels; using System.ServiceModel.Description; using System.ServiceModel.Dispatcher; using System.Xml.Schema; using ServiceDescription = System.Web.Services.Description.ServiceDescription; namespace Thinktecture.ServiceModel.Extensions.Description { public class FlatWsdl : IWsdlExportExtension, IEndpointBehavior { public void ExportContract(WsdlExporter exporter, WsdlContractConversionContext context) {} public void ExportEndpoint(WsdlExporter exporter, WsdlEndpointConversionContext context) { XmlSchemaSet schemaSet = exporter.GeneratedXmlSchemas; ProcessNillable(schemaSet); ... ... } private static void WalkTheParticle(XmlSchemaParticle particle) { if (particle is XmlSchemaElement) { XmlSchemaElement elem = particle as XmlSchemaElement; Console.WriteLine(elem.Name); if (elem != null &amp;&amp; String.Compare(elem.Name, "name", false) == 0) { elem.IsNillable = false; //This works! Console.WriteLine("Bazinga!"); } if (elem.RefName.IsEmpty) { XmlSchemaType type = (XmlSchemaType)elem.ElementSchemaType; if (type is XmlSchemaComplexType) { XmlSchemaComplexType ct = type as XmlSchemaComplexType; if (ct.QualifiedName.IsEmpty) { WalkTheParticle(ct.ContentTypeParticle); } } } } else if (particle is XmlSchemaGroupBase) //xs:all, xs:choice, xs:sequence { XmlSchemaGroupBase baseParticle = particle as XmlSchemaGroupBase; foreach (XmlSchemaParticle subParticle in baseParticle.Items) { WalkTheParticle(subParticle); } } } private static void AddImportedSchemas(XmlSchema schema, XmlSchemaSet schemaSet, List&lt;XmlSchema&gt; importsList) { ... } private static void RemoveXsdImports(XmlSchema schema) { ... } public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) {} public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime) {} public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) {} public void Validate(ServiceEndpoint endpoint) {} } } </code></pre> <p>Now, it works in the sample project and I need to put this in the actual project with around 80 contracts and each complex enough to have many properties. Some are required and some are not. I need to figure out how I can automate the cancellation of nillable=true for the required ones. I was hoping the putting the <code>[DataMember(IsRequired=True)]</code> would help me locate the property in the <code>WalkTheParticle()</code> method above. However, once inside the method, there is no real thing I can relate to make this work except the element's name and it will be a real headache to maintain a list of properties to mark as non-nillable. I'm looking for a better solution.</p>
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