DiscoveryReference::ReadDocument Method (Stream^)

 

Reads the passed Stream and returns an instance of the class representing the type of referenced document.

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

public:
virtual Object^ ReadDocument(
	Stream^ stream
) abstract

Parameters

stream
Type: System.IO::Stream^

Stream containing the reference document.

Return Value

Type: System::Object^

An Object with an underlying type matching the type of referenced document.

The return value is always an Object. However, the underlying type varies, depending on the type of document referenced. For instance, a Stream passed into SchemaReference::ReadDocument returns an instance of XmlSchema.

#using <System.dll>
#using <System.Xml.dll>
#using <System.Web.Services.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 its 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 = __super::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()
{
   DiscoveryDocument^ myDiscoveryDocument;
   StreamReader^ myStreamReader = gcnew StreamReader( "c:\\Inetpub\\wwwroot\\dataservice.disco" );
   FileStream^ myStream = gcnew FileStream( "C:\\MyDiscovery.disco",FileMode::OpenOrCreate );
   Console::WriteLine( "Demonstrating Discovery Reference class." );

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

   // Variable of type DiscoveryReference class defined.
   MyDiscoveryReferenceClass^ myDiscoveryReference;
   myDiscoveryReference = gcnew MyDiscoveryReferenceClass;
   DiscoveryClientProtocol^ myDiscoveryClientProtocol = gcnew DiscoveryClientProtocol;
   myDiscoveryClientProtocol->Credentials = CredentialCache::DefaultCredentials;

   // Set 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();
}

.NET Framework
Available since 1.1
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