DiscoveryReference 类

参考

定义

命名空间:: System.Web.Services.Discovery

程序集:: System.Web.Services.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

使用 XML Web services 发现的可发现引用的基类。

public ref class DiscoveryReference abstract

public abstract class DiscoveryReference

type DiscoveryReference = class

Public MustInherit Class DiscoveryReference

继承: Object
DiscoveryReference

派生: System.Web.Services.Discovery.ContractReference

System.Web.Services.Discovery.DiscoveryDocumentReference

System.Web.Services.Discovery.SchemaReference

示例

#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 );
   }
}

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);
   }
}

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

Class MyDiscoveryDocumentClass
   Public Shared Sub Main()
      Try
         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 DiscoveryReference class.")

         ' Read the discovery file.
         myDiscoveryDocument = DiscoveryDocument.Read(myStreamReader)

         ' Create an instance of the DiscoveryReference class.
         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 = "http://localhost/dataservice.disco"
         Console.WriteLine("Url is : " + myDiscoveryReference.Url)

         ' Resolve the URL.
         myDiscoveryReference.Resolve()

         myStreamReader.Close()
         myStream.Close()

      Catch e as Exception
         Console.WriteLine("Exception caught! - {0}", e.Message)
      End Try
   
   End Sub

End Class


' Class derived from DiscoveryReference class and overriding it 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

注解

ContractReference、 SchemaReference和 DiscoveryDocumentReference 所有继承自 DiscoveryReference，并表示可通过 XML Web 服务发现发现的三种类型的文档：服务说明、XML 架构定义 (XSD) 架构以及发现文档。

构造函数

DiscoveryReference()

初始化 DiscoveryReference 类的新实例。

属性

ClientProtocol	获取或设置在发现过程中使用的 DiscoveryClientProtocol 的实例。
DefaultFilename	获取在保存引用的发现文档、XSD 架构或服务说明时使用的默认文件的名称。
Url	获取或设置引用的文档的 URL。

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
FilenameFromUrl(String)	返回基于传递的 URL 的文件名。
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ReadDocument(Stream)	读取传递的 Stream 并返回表示所引用文档的类型的类的实例。
Resolve()	下载 Url 处的引用文档以解析引用的文档是否有效。
Resolve(String, Stream)	解析引用的文档是否有效。
ToString()	返回表示当前对象的字符串。 (继承自 Object)
WriteDocument(Object, Stream)	当在派生类中重写时，将此文档写入 Stream。

适用于

通过

DiscoveryReference 类

定义

示例

注解

构造函数

属性

方法

适用于

另请参阅

其他资源