ITransportHeaders.Item プロパティ

2008-03-28

指定したキーに関連付けられたトランスポートヘッダーを取得または設定します。

[C#] C# では、このプロパティは ITransportHeaders クラスのインデクサになります。

Default Property Item( _
   ByVal key As Object _) As Object
[C#]
object this[
   objectkey] {get; set;}
[C++]
__property Object* get_Item(Object* key);__property void set_Item(Object* key,   Object*);
[JScript]
returnValue = ITransportHeadersObject.Item(key);ITransportHeadersObject.Item(key) = returnValue;またはreturnValue = ITransportHeadersObject(key);ITransportHeadersObject(key) = returnValue;

[JScript] JScript では、この型で定義されている既定のインデックスプロパティを使用することができます。しかし、独自のインデックスプロパティを明示的に定義することはできません。ただし、このクラスの expando 属性を指定すると、既定のインデックスプロパティが提供されます。提供されるインデックスプロパティの型は Object 型であり、インデックス型は String になります。

引数 [JScript]

key
要求したトランスポートヘッダーに関連付けられているキー。

パラメータ [Visual Basic, C#, C++]

key
要求したトランスポートヘッダーに関連付けられているキー。

プロパティ値

指定したキーに関連付けられたトランスポートヘッダー。

例外

例外の種類	条件
SecurityException	直前の呼び出し元に、インフラストラクチャアクセス許可がありません。

解説

格納されたヘッダーが null 参照 (Visual Basic では Nothing) に設定されている場合は、キーと値の組み合わせが削除されています。

使用例

 

Imports System
Imports System.Collections
Imports System.Runtime.Remoting
Imports System.Runtime.Remoting.Channels
Imports System.Runtime.Remoting.Channels.Tcp

Class MyITransportHeadersClass
   Implements ITransportHeaders
   Private myInt As Integer = 0
   Private myDictionaryEntry(9) As DictionaryEntry
   ' Implement the 'Item' property.
   Property ITransportHeaders(myKey As Object) As Object Implements ITransportHeaders.Item
      Get
         If Not (myKey Is Nothing) Then
            Dim i As Integer
            For i = 0 To myInt
               If myDictionaryEntry(i).Key = myKey Then
                  Return myDictionaryEntry(i).Value
               End If
            Next i
         End If
         Return 0
      End Get
      Set
         myDictionaryEntry(myInt) = New DictionaryEntry(myKey, value)
         myInt += 1
      End Set
   End Property

   ' Implement the 'GetEnumerator' method.
   Function GetEnumerator() As IEnumerator  Implements ITransportHeaders.GetEnumerator
      Dim myHashtable As New Hashtable()
      Dim j As Integer
      For j = 0 To myInt - 1
         myHashtable.Add(myDictionaryEntry(j).Key, myDictionaryEntry(j).Value)
      Next j
      Return myHashtable.GetEnumerator()
   End Function 'ITransportHeaders.GetEnumerator

   Public Shared Sub Main()
      Try
         ' Create and register a 'TcpChannel' object.
         Dim myTcpChannel As New TcpChannel(8085)
         ChannelServices.RegisterChannel(myTcpChannel)
         RemotingConfiguration.RegisterWellKnownServiceType(GetType(MyHelloServer), "SayHello", _
                                                         WellKnownObjectMode.SingleCall)
         ' Create an instance of 'myITransportHeadersObj'.
         Dim myITransportHeadersObj As New MyITransportHeadersClass()
         Dim myITransportHeaders As ITransportHeaders = _
                                              CType(myITransportHeadersObj, ITransportHeaders)
         ' Add items to the header list.
         myITransportHeaders("Header1") = "TransportHeader1"
         myITransportHeaders("Header2") = "TransportHeader2"
         ' Get the 'ITranportHeader' item value with key 'Header2'.
         Console.WriteLine("ITransport Header item value with key 'Header2' is :" + _
                                                        myITransportHeaders("Header2"))
         Dim myEnumerator As IEnumerator = myITransportHeaders.GetEnumerator()
         Console.WriteLine("     -KEY-      -VALUE-")
         While myEnumerator.MoveNext()
            ' Display the 'Key' and 'Value' of the current element.
            Dim myEntry As Object = myEnumerator.Current
            Dim myDictionaryEntry As DictionaryEntry = CType(myEntry, DictionaryEntry)
            Console.WriteLine("   {0}:   {1}", myDictionaryEntry.Key, myDictionaryEntry.Value)
         End While
         Console.WriteLine("Hit <enter> to exit...")
         Console.ReadLine()
      Catch ex As Exception
         Console.WriteLine("The following exception is raised on the server side: " + ex.Message)
      End Try
   End Sub 'Main
End Class 'MyITransportHeadersClass


[C#] 

using System;
using System.Collections;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;

class MyITransportHeadersClass : ITransportHeaders
{
   int myInt = 0;
   DictionaryEntry[] myDictionaryEntry = new DictionaryEntry[10];
   // Implement the 'Item' property.
   object ITransportHeaders.this[object myKey]
   {
      get
      {
         if(myKey != null)
         {
            for(int i = 0; i <= myInt; i++)
               if(myDictionaryEntry[i].Key == myKey)
                  return myDictionaryEntry[i].Value;
         }
         return 0;
      }
      set
      {
         myDictionaryEntry[myInt] = new DictionaryEntry(myKey, value);
         myInt++;
      }
   }
   // Implement the 'GetEnumerator' method.
   IEnumerator ITransportHeaders.GetEnumerator()
   {
      Hashtable myHashtable = new Hashtable();
      for(int j = 0; j < myInt; j++)
         myHashtable.Add(myDictionaryEntry[j].Key, myDictionaryEntry[j].Value);
      return myHashtable.GetEnumerator();
   }

   public static void Main()
   {
      try
      {
         // Create and register a 'TcpChannel' object.
         TcpChannel myTcpChannel = new TcpChannel(8085);
         ChannelServices.RegisterChannel(myTcpChannel);
         RemotingConfiguration.RegisterWellKnownServiceType(typeof(MyHelloServer), "SayHello",
            WellKnownObjectMode.SingleCall);
         // Create an instance of 'myITransportHeadersObj'.
         MyITransportHeadersClass myITransportHeadersObj = new MyITransportHeadersClass();
         ITransportHeaders myITransportHeaders = (ITransportHeaders)myITransportHeadersObj;
         // Add items to the header list.
         myITransportHeaders["Header1"] = "TransportHeader1";
         myITransportHeaders["Header2"] = "TransportHeader2";
         // Get the 'ITranportHeader' item value with key 'Header2'.
         Console.WriteLine("ITransport Header item value with key 'Header2' is :"
            +myITransportHeaders["Header2"]);
         IEnumerator myEnumerator = myITransportHeaders.GetEnumerator();
         Console.WriteLine( "     -KEY-      -VALUE-" );
         while ( myEnumerator.MoveNext() )
         {
            // Display the 'Key' and 'Value' of the current element.
            object myEntry = myEnumerator.Current;
            DictionaryEntry myDictionaryEntry = (DictionaryEntry)myEntry;
            Console.WriteLine("   {0}:   {1}", myDictionaryEntry.Key, myDictionaryEntry.Value);
         }
         Console.WriteLine("Hit <enter> to exit...");
         Console.ReadLine();
      }
      catch(Exception ex)
      {
         Console.WriteLine("The following exception is raised on the server side: " +ex.Message);
      }
   }
}


[C++] 

#using <mscorlib.dll>
#using <System.Runtime.Remoting.dll>
#using <System.dll>
#using <ITransportHeaders_3_Share.dll>
using namespace System;
using namespace System::Collections;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Channels::Tcp;

__gc class MyITransportHeadersClass : public ITransportHeaders
{
   int myInt;
   DictionaryEntry myDictionaryEntry[];
public:
   MyITransportHeadersClass() {
      myInt = 0;
      myDictionaryEntry = new DictionaryEntry[10];
   }
   // Implement the 'Item' property.
   __property Object* ITransportHeaders::get_Item(Object* myKey)
   {
      if(myKey != 0)
      {
         for(int i = 0; i <= myInt; i++)
            if(myDictionaryEntry[i].Key == myKey)
               return myDictionaryEntry[i].Value;
      }
      return 0;
   }
   __property void ITransportHeaders::set_Item(Object* myKey, Object* value)
   {
      myDictionaryEntry[myInt] = DictionaryEntry(myKey, value);
      myInt++;
   }

   // Implement the 'GetEnumerator' method.
   IEnumerator* ITransportHeaders::GetEnumerator()
   {
      Hashtable* myHashtable = new Hashtable();
      for(int j = 0; j < myInt; j++)
         myHashtable->Add(myDictionaryEntry[j].Key, myDictionaryEntry[j].Value);
      return myHashtable->GetEnumerator();
   }

};

int main()
{
   try
   {
      // Create and register a 'TcpChannel' object.
      TcpChannel* myTcpChannel = new TcpChannel(8085);
      ChannelServices::RegisterChannel(myTcpChannel);
      RemotingConfiguration::RegisterWellKnownServiceType(__typeof(MyHelloServer), S"SayHello",
         WellKnownObjectMode::SingleCall);
      // Create an instance of 'myITransportHeadersObj'.
      MyITransportHeadersClass* myITransportHeadersObj = new MyITransportHeadersClass();
      ITransportHeaders* myITransportHeaders = dynamic_cast<ITransportHeaders*>(myITransportHeadersObj);
      // Add items to the header list.
      myITransportHeaders->Item[S"Header1"] = S"TransportHeader1";
      myITransportHeaders->Item[S"Header2"] = S"TransportHeader2";
      // Get the 'ITranportHeader' item value with key 'Header2'.
      Console::WriteLine(S"ITransport Header item value with key 'Header2' is :{0}", myITransportHeaders->Item[S"Header2"]);
      IEnumerator* myEnumerator = myITransportHeaders->GetEnumerator();
      Console::WriteLine( S"     -KEY-      -VALUE-" );
      while ( myEnumerator->MoveNext() )
      {
         // Display the 'Key' and 'Value' of the current element.
         Object* myEntry = myEnumerator->Current;
         DictionaryEntry myDictionaryEntry = *dynamic_cast<__box DictionaryEntry*>(myEntry);
         Console::WriteLine(S"   {0}:   {1}", myDictionaryEntry.Key, myDictionaryEntry.Value);
      }
      Console::WriteLine(S"Hit <enter> to exit...");
      Console::ReadLine();
   }
   catch(Exception* ex)
   {
      Console::WriteLine(S"The following exception is raised on the server side: {0}", ex->Message);
   }
}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタボタンをクリックします。

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ

.NET Framework セキュリティ:

SecurityPermission (インフラストラクチャコードを操作するために必要なアクセス許可)要求値: SecurityAction.LinkDemand; アクセス許可値: SecurityPermissionFlag.Infrastructure

参照

ITransportHeaders インターフェイス | ITransportHeaders メンバ | System.Runtime.Remoting.Channels 名前空間