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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 abstract class DiscoveryReference

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;
using System.IO;
using System.Web.Services.Discovery;
using System.Net;

class MyDiscoveryDocumentClass
{
   static void Main()
   {
      try {
         DiscoveryDocument myDiscoveryDocument;
         StreamReader myStreamReader = 
             new StreamReader("c:\\Inetpub\\wwwroot\\dataservice.disco");
         FileStream myStream = new 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 =  new MyDiscoveryReferenceClass();

         DiscoveryClientProtocol myDiscoveryClientProtocol = 
             new DiscoveryClientProtocol();
         myDiscoveryClientProtocol.Credentials = 
             CredentialCache.DefaultCredentials;

         // Set the client protocol.
         myDiscoveryReference.ClientProtocol = myDiscoveryClientProtocol;

         // Read the default file name.
         Console.WriteLine("Default file name is: " 
             + 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: " + myDiscoveryReference.Url);

         // Resolve the URL.
         myDiscoveryReference.Resolve();

         myStreamReader.Close();
         myStream.Close();
      }
      catch (Exception e) 
      {
         Console.WriteLine("Exception caught! - {0}", e.Message);
      }
   }
}

// Class derived from DiscoveryReference class and overriding it members. 
class MyDiscoveryReferenceClass : DiscoveryReference
{
   private string myDocumentUrl;
   public override string DefaultFilename
   {
      get
      {
         return "dataservice.disco";
      }
   }

   public override object ReadDocument(Stream stream)
   {
      return stream;
   }

   public new void Resolve()
   {
      try
      {
         DiscoveryDocument myDiscoveryRefDocument;
         myDiscoveryRefDocument = base.ClientProtocol.Discover(Url);
      }
      catch (Exception e)
      {
         throw(e);
      }
   }

   protected override void Resolve(string contentType, Stream stream) {}

   public override string Url
   {
      get
      {
         return myDocumentUrl;
      }

      set
      {
         myDocumentUrl = value;
      }
   }

   public override void WriteDocument(object document, System.IO.Stream stream)
   {
      DiscoveryDocument myDiscoveryDocument = (DiscoveryDocument)document;
      myDiscoveryDocument.Write(stream);
   }
}
#using <mscorlib.dll>
#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.
__gc class MyDiscoveryReferenceClass : public DiscoveryReference
{
private:
   String* myDocumentUrl;
public:
   __property String* get_DefaultFilename()
   {
      return S"dataservice.disco";
   }

   Object* ReadDocument(Stream* stream)
   {
      return stream;
   }

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

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

public:
   __property String* get_Url()
   {
      return myDocumentUrl;
   }

   __property void set_Url( String* value )
   {
      myDocumentUrl = value;
   }

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

int main()
{
   try {
      DiscoveryDocument* myDiscoveryDocument;
      StreamReader* myStreamReader =
         new StreamReader(S"c:\\Inetpub\\wwwroot\\dataservice.disco");
      FileStream* myStream = new FileStream(S"c:\\MyDiscovery.disco",
         FileMode::OpenOrCreate);
      Console::WriteLine(S"Demonstrating DiscoveryReference class.");

      // Read discovery file.
      myDiscoveryDocument = DiscoveryDocument::Read(myStreamReader);

      // Create a new instance of the DiscoveryReference class.
      MyDiscoveryReferenceClass* myDiscoveryReference;
      myDiscoveryReference =  new MyDiscoveryReferenceClass();

      DiscoveryClientProtocol* myDiscoveryClientProtocol =
         new DiscoveryClientProtocol();
      myDiscoveryClientProtocol->Credentials =
         CredentialCache::DefaultCredentials;

      // Set the client protocol.
      myDiscoveryReference->ClientProtocol = myDiscoveryClientProtocol;

      // Read the default file name.
      Console::WriteLine(S"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 = S"http://localhost/dataservice.disco";
      Console::WriteLine(S"Url is: {0}", myDiscoveryReference->Url);

      // Resolve the URL.
      myDiscoveryReference->Resolve();

      myStreamReader->Close();
      myStream->Close();
   }
   catch (Exception* e)
   {
      Console::WriteLine(S"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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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