DiscoveryReference.ReadDocument-Methode

Liest den übergebenen Stream und gibt eine Instanz der Klasse zurück, die den Typ des Dokuments darstellt, auf das verwiesen wird.

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

Syntax

'Declaration
Public MustOverride Function ReadDocument ( _
    stream As Stream _
) As Object
'Usage
Dim instance As DiscoveryReference
Dim stream As Stream
Dim returnValue As Object

returnValue = instance.ReadDocument(stream)

public abstract Object ReadDocument (
    Stream stream
)

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

public abstract Object ReadDocument (
    Stream stream
)

public abstract function ReadDocument (
    stream : Stream
) : Object

Parameter

• stream
  Der Stream, der das Verweisdokument enthält.

Rückgabewert

Ein Object mit einem zugrunde liegenden Typ, der dem Typ des Dokuments entspricht, auf das verwiesen wird.

Hinweise

Der Rückgabewert ist immer ein Object. Der zugrunde liegende Typ variiert jedoch in Abhängigkeit vom Typ des Dokuments, auf das verwiesen wird. Ein Stream, der an SchemaReference.ReadDocument übergeben wird, gibt z. B. eine Instanz von XmlSchema zurück.

Beispiel

Imports System
Imports System.IO
Imports System.Web.Services.Discovery
Imports System.Net

Class MyDiscoveryDocumentClass
  Public Shared Sub Main()

      Dim myDiscoveryDocument As DiscoveryDocument
      Dim myStreamReader As _
         New StreamReader("c:\Inetpub\wwwroot\dataservice.disco")
      Dim myStream As _
         New 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.
      Dim myDiscoveryReference As MyDiscoveryReferenceClass
      myDiscoveryReference = New MyDiscoveryReferenceClass()

      Dim myDiscoveryClientProtocol As 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 = "https://localhost/dataservice.disco"
      Console.WriteLine("Url is : " & myDiscoveryReference.Url)

      ' Resolve the URL
      myDiscoveryReference.Resolve()

      myStreamReader.Close()
      myStream.Close()
   End Sub

End Class


' Class derived from DiscoveryReference class and overriding its members.
Class MyDiscoveryReferenceClass
   Inherits DiscoveryReference
   Private myDocumentUrl As String

   Public Overrides ReadOnly Property DefaultFilename() As String
      Get
         Return "dataservice.disco"
      End Get
   End Property

   Public Overrides Function _
      ReadDocument(ByVal stream As System.IO.Stream) As Object
      Return stream
   End Function

   Public Overloads Sub Resolve()
      Try
         Dim myDiscoveryRefDocument As DiscoveryDocument
         myDiscoveryRefDocument = MyBase.ClientProtocol.Discover(Url)
      Catch e As Exception
         Throw e
      End Try
   End Sub

   Protected Overloads Overrides Sub _
      Resolve(ByVal contentType As String, ByVal stream As Stream)
   End Sub

   Public Overrides Property Url() As String
      Get
         Return myDocumentUrl
      End Get

      Set(ByVal Value As String)
         myDocumentUrl = Value
      End Set
   End Property

   Public Overrides Sub WriteDocument _
      (ByVal document As Object, ByVal stream As System.IO.Stream)
      Dim myDiscoveryDocument As DiscoveryDocument = _
         CType(document, DiscoveryDocument)
      myDiscoveryDocument.Write(stream)
   End Sub
End Class

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

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

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

      // Set 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 = "https://localhost/dataservice.disco";
      Console.WriteLine("Url is: " + myDiscoveryReference.Url);

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

      myStreamReader.Close();
      myStream.Close();
   }
}

// Class derived from DiscoveryReference class and overriding its 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 <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 = "https://localhost/dataservice.disco";
   Console::WriteLine( "Url is: {0}", myDiscoveryReference->Url );
   
   // Resolve the URL.
   myDiscoveryReference->Resolve();
   myStreamReader->Close();
   myStream->Close();
}

Plattformen

Windows 98, Windows 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

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

DiscoveryReference-Klasse
DiscoveryReference-Member
System.Web.Services.Discovery-Namespace