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DiscoveryReference Class

The base class for discoverable references using XML Web services discovery.

Namespace: System.Web.Services.Discovery
Assembly: System.Web.Services (in system.web.services.dll)

public ref class DiscoveryReference abstract
public abstract class DiscoveryReference
public abstract class DiscoveryReference
Not applicable.

ContractReference, SchemaReference, and DiscoveryDocumentReference all inherit from DiscoveryReference, and represent the three types of documents discoverable through XML Web services discovery: Service Descriptions, XML Schema Definition (XSD) schemas, and discovery documents, respectively.

#using <System.Xml.dll>
#using <System.Web.Services.dll>
#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Web::Services::Discovery;
using namespace System::Net;

// Class derived from DiscoveryReference class and overriding it members.
ref class MyDiscoveryReferenceClass: public DiscoveryReference
{
private:
   String^ myDocumentUrl;

public:
   property String^ DefaultFilename 
   {
      virtual String^ get() override
      {
         return "dataservice.disco";
      }
   }

   virtual Object^ ReadDocument( Stream^ stream ) override
   {
      return stream;
   }

   void Resolve()
   {
      try
      {
         DiscoveryDocument^ myDiscoveryRefDocument;
         myDiscoveryRefDocument = DiscoveryReference::ClientProtocol->Discover( Url );
      }
      catch ( Exception^ e ) 
      {
         throw e;
      }
   }

protected:
   virtual void Resolve( String^ /*contentType*/, Stream^ /*stream*/ ) override {}

public:
   property String^ Url 
   {
      virtual String^ get() override
      {
         return myDocumentUrl;
      }

      virtual void set( String^ value ) override
      {
         myDocumentUrl = value;
      }
   }

   virtual void WriteDocument( Object^ document, System::IO::Stream^ stream ) override
   {
      DiscoveryDocument^ myDiscoveryDocument = dynamic_cast<DiscoveryDocument^>(document);
      myDiscoveryDocument->Write( stream );
   }
};

int main()
{
   try
   {
      DiscoveryDocument^ myDiscoveryDocument;
      StreamReader^ myStreamReader = gcnew StreamReader( "c:\\Inetpub\\wwwroot\\dataservice.disco" );
      FileStream^ myStream = gcnew FileStream( "c:\\MyDiscovery.disco",FileMode::OpenOrCreate );
      Console::WriteLine( "Demonstrating DiscoveryReference class." );
      
      // Read discovery file.
      myDiscoveryDocument = DiscoveryDocument::Read( myStreamReader );
      
      // Create a new instance of the DiscoveryReference class.
      MyDiscoveryReferenceClass^ myDiscoveryReference;
      myDiscoveryReference = gcnew MyDiscoveryReferenceClass;
      DiscoveryClientProtocol^ myDiscoveryClientProtocol = gcnew DiscoveryClientProtocol;
      myDiscoveryClientProtocol->Credentials = CredentialCache::DefaultCredentials;
      
      // Set the client protocol.
      myDiscoveryReference->ClientProtocol = myDiscoveryClientProtocol;
      
      // Read the default file name.
      Console::WriteLine( "Default file name is: {0}", myDiscoveryReference->DefaultFilename );
      
      // Write the document.
      myDiscoveryReference->WriteDocument( myDiscoveryDocument, myStream );
      
      // Read the document.
      myDiscoveryReference->ReadDocument( myStream );
      
      // Set the URL.
      myDiscoveryReference->Url = "http://localhost/dataservice.disco";
      Console::WriteLine( "Url is: {0}", myDiscoveryReference->Url );
      
      // Resolve the URL.
      myDiscoveryReference->Resolve();
      myStreamReader->Close();
      myStream->Close();
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception caught! - {0}", e->Message );
   }
}

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0
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