ITransportHeaders.Item[Object] Property

Definition

Namespace:

System.Runtime.Remoting.Channels

Assembly:

mscorlib.dll

Gets or sets a transport header associated with the given key.

public:
 property System::Object ^ default[System::Object ^] { System::Object ^ get(System::Object ^ key); void set(System::Object ^ key, System::Object ^ value); };

public object this[object key] { [System.Security.SecurityCritical] get; [System.Security.SecurityCritical] set; }

[<get: System.Security.SecurityCritical>]
[<set: System.Security.SecurityCritical>]
member this.Item(obj) : obj with get, set

Default Public Property Item(key As Object) As Object

Parameters

key

Object

The key the requested transport header is associated with.

Property Value

Object

A transport header associated with the given key.

Attributes

SecurityCriticalAttribute

Exceptions

SecurityException

The immediate caller does not have infrastructure permission.

Examples

#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;
ref class MyITransportHeadersClass: public ITransportHeaders
{
private:

   int myInt;
   array<DictionaryEntry>^myDictionaryEntry;

public:
   MyITransportHeadersClass()
   {
      myInt = 0;
      myDictionaryEntry = gcnew array<DictionaryEntry>(10);
   }


   property Object^ Item [Object^]
   {

      // Implement the 'Item' property.
     virtual Object^ get( Object^ myKey )
      {
         if ( myKey != nullptr )
         {
            for ( int i = 0; i <= myInt; i++ )
               if ( myDictionaryEntry[ i ].Key == myKey )
                              return myDictionaryEntry[ i ].Value;
         }

         return nullptr;
      }

      virtual void set( Object^ myKey, Object^ value )
      {
         myDictionaryEntry[ myInt ] = DictionaryEntry(myKey,value);
         myInt++;
      }

   }

   // Implement the 'GetEnumerator' method.
   virtual IEnumerator^ GetEnumerator()
   {
      Hashtable^ myHashtable = gcnew 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 = gcnew TcpChannel( 8085 );
      ChannelServices::RegisterChannel( myTcpChannel, false );
      RemotingConfiguration::RegisterWellKnownServiceType( MyHelloServer::typeid, "SayHello", WellKnownObjectMode::SingleCall );
      
      // Create an instance of 'myITransportHeadersObj'.
      MyITransportHeadersClass^ myITransportHeadersObj = gcnew MyITransportHeadersClass;
      ITransportHeaders^ myITransportHeaders = dynamic_cast<ITransportHeaders^>(myITransportHeadersObj);
      
      // Add items to the header list.
      myITransportHeaders->default[ "Header1" ] = "TransportHeader1";
      myITransportHeaders->default[ "Header2" ] = "TransportHeader2";
      
      // Get the 'ITranportHeader' item value with key 'Header2'.
      Console::WriteLine( "ITransport Header item value with key 'Header2' is :{0}", myITransportHeaders->default[ "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 =  *dynamic_cast<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: {0}", ex->Message );
   }

}

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);
      }
   }
}

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
End Class

Remarks

If a stored header is set to null, the key-value pair is removed.