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IWsdlImportExtension Interface


Implement and attach to a WsdlImporter object to control how the importer maps Web Services Description Language (WSDL) parts to those of a ServiceDescription object.

public interface class IWsdlImportExtension
public interface IWsdlImportExtension
type IWsdlImportExtension = interface
Public Interface IWsdlImportExtension


The following code example shows the use of IWsdlImportExtension to add an System.ServiceModel.Description.IServiceContractGenerationExtension and an System.ServiceModel.Description.IOperationContractGenerationExtension (the WsdlDocumentationImporter, in this case) to modify generated WCF client code at the interface and operation level.

  public void ImportContract(WsdlImporter importer, WsdlContractConversionContext context)
      // Contract Documentation
      if (context.WsdlPortType.Documentation != null)
  context.Contract.Behaviors.Add(new WsdlDocumentationImporter(context.WsdlPortType.Documentation));
      // Operation Documentation
      foreach (Operation operation in context.WsdlPortType.Operations)
          if (operation.Documentation != null)
              OperationDescription operationDescription = context.Contract.Operations.Find(operation.Name);
              if (operationDescription != null)
      operationDescription.Behaviors.Add(new WsdlDocumentationImporter(operation.Documentation));

The following code example shows how to configure the client metadata system to use the custom IWsdlImportExtension from an application configuration file.

          <extension type="Microsoft.WCF.Documentation.WsdlDocumentationImporter, WsdlDocumentation, Version=, Culture=neutral, PublicKeyToken=null" />


Implement the IWsdlImportExtension interface to control the mapping between WSDL and ServiceEndpoint and ContractDescription objects, especially when reading custom WSDL extensions to modify your contract or endpoint information. Then attach your custom IWsdlImportExtension object to a WsdlImporter either programmatically or by using an application configuration file. You can also attach your custom IWsdlImportExtension object to the internal WsdlImporter used by the ServiceModel Metadata Utility Tool (Svcutil.exe) using an application configuration file.

The ImportContract method is called to import a contract.

Use the BeforeImport method to modify the metadata that is then imported into ServiceEndpoint and ContractDescription objects.


BeforeImport(ServiceDescriptionCollection, XmlSchemaSet, ICollection<XmlElement>)

Called prior to importing metadata documents.

ImportContract(WsdlImporter, WsdlContractConversionContext)

Called when importing a contract.

ImportEndpoint(WsdlImporter, WsdlEndpointConversionContext)

Called when importing an endpoint.

Applies to