NamedPipeClientChannel Class

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Contents

Overview

The NamedPipeClientChannel uses Windows Named Pipes to communicate between client and server on the same machine or local network. Named Pipes are recommended for communications between processes on the same computer, especially when run by separate users.

Please refer to the MSDN documentation on Named Pipes for more details.


Location

Implemented interfaces


Constants

URL_SCHEMES_NOT_SUPPORTED   protected     (declared in ClientChannel)



Oxygene:   const URL_SCHEMES_NOT_SUPPORTED: String
C#:   const String URL_SCHEMES_NOT_SUPPORTED
VB:   Dim URL_SCHEMES_NOT_SUPPORTED As String


Properties

Busy     (declared in ClientChannel)

Busy is true if the transport channel is currently busy with an operation. Otherwise Busy is false. By default, if the transport channel is busy, it will not attempt to process another request and a ChannelBusyException exception is raised if you try to do so.



Prism:   property Busy: Boolean read
C#:   Boolean Busy { get; }
VB:   Property ReadOnly Busy As Boolean


HasAfterReceiveStream   protected     (declared in Channel)



Prism:   property HasAfterReceiveStream: Boolean read
C#:   Boolean HasAfterReceiveStream { get; }
VB:   Property ReadOnly HasAfterReceiveStream As Boolean


HasBeforeSendStream   protected     (declared in Channel)



Prism:   property HasBeforeSendStream: Boolean read
C#:   Boolean HasBeforeSendStream { get; }
VB:   Property ReadOnly HasBeforeSendStream As Boolean


HasOnTransferProgress   protected     (declared in ClientChannel)



Prism:   property HasOnTransferProgress: Boolean read
C#:   Boolean HasOnTransferProgress { get; }
VB:   Property ReadOnly HasOnTransferProgress As Boolean


NetworkByteOrder

Defines an order of transferring bytes. If true, the channel uses big-endian when transferring the data.



Prism:   property NetworkByteOrder: Boolean read write
C#:   Boolean NetworkByteOrder { get; set; }
VB:   Property NetworkByteOrder As Boolean


Path

Defines the unique name of the server to use. The name must match the Path property specified on the NamedPipeServerChannel in the server application.



Prism:   property Path: String read write
C#:   String Path { get; set; }
VB:   Property Path As String


Server

Specifies the name of the host running the server.

This can be a host name or IP address on the local net, or "." (default), which indicates the local machine.



Prism:   property Server: String read write
C#:   String Server { get; set; }
VB:   Property Server As String


TargetUri



Prism:   property TargetUri: Uri read write
C#:   Uri TargetUri { get; set; }
VB:   Property TargetUri As Uri


TargetUrl     (declared in ClientChannel)



Prism:   property TargetUrl: String read write
C#:   String TargetUrl { get; set; }
VB:   Property TargetUrl As String


Class Methods

BuildTargetUri   protected     (declared in ClientChannel)



Oxygene:   class method BuildTargetUri(protocol: String; host: String; port: Int32; message: String): Uri
C#:   static Uri BuildTargetUri(String protocol, String host, Int32 port, String message)
VB:   Shared Function BuildTargetUri(protocol As String, host As String, port As Int32, message As String) As Uri


Parameters:

  • protocol:
  • host:
  • port:
  • message:


ChannelMatchingTargetUri (String): IClientChannel     (declared in ClientChannel)



Oxygene:   class method ChannelMatchingTargetUri(url: String): IClientChannel
C#:   static IClientChannel ChannelMatchingTargetUri(String url)
VB:   Shared Function ChannelMatchingTargetUri(url As String) As IClientChannel


Parameters:

  • url:


ChannelMatchingTargetUri (Uri): IClientChannel     (declared in ClientChannel)



Oxygene:   class method ChannelMatchingTargetUri(uri: Uri): IClientChannel
C#:   static IClientChannel ChannelMatchingTargetUri(Uri uri)
VB:   Shared Function ChannelMatchingTargetUri(uri As Uri) As IClientChannel


Parameters:

  • uri:


Instance Methods

constructor

Creates a new NamedPipeClientChannel instance.


Oxygene:   constructor
C#:   constructor()
VB:   Sub New


AsyncDispatch     (declared in ClientChannel)



Oxygene:   method AsyncDispatch(message: IMessage; callback: AsyncCallback; userData: Object): IClientAsyncResult
C#:   IClientAsyncResult AsyncDispatch(IMessage message, AsyncCallback callback, Object userData)
VB:   Function AsyncDispatch(message As IMessage, callback As AsyncCallback, userData As Object) As IClientAsyncResult


Parameters:

  • message:
  • callback:
  • userData:


BeforeDispatch   protected     (declared in ClientChannel)



Oxygene:   method BeforeDispatch(message: IMessage)
C#:   void BeforeDispatch(IMessage message)
VB:   Sub BeforeDispatch(message As IMessage)


Parameters:

  • message:


BeginDispatch (IMessage, AsyncCallback, Boolean, Object): IClientAsyncResult   protected     (declared in ClientChannel)



Oxygene:   method BeginDispatch(message: IMessage; callback: AsyncCallback; disposeChannel: Boolean; userData: Object): IClientAsyncResult
C#:   IClientAsyncResult BeginDispatch(IMessage message, AsyncCallback callback, Boolean disposeChannel, Object userData)
VB:   Function BeginDispatch(message As IMessage, callback As AsyncCallback, disposeChannel As Boolean, userData As Object) As IClientAsyncResult


Parameters:

  • message:
  • callback:
  • disposeChannel:
  • userData:


BeginDispatch (IMessage, AsyncCallback, Object): IClientAsyncResult     (declared in ClientChannel)



Oxygene:   method BeginDispatch(message: IMessage; callback: AsyncCallback; userData: Object): IClientAsyncResult
C#:   IClientAsyncResult BeginDispatch(IMessage message, AsyncCallback callback, Object userData)
VB:   Function BeginDispatch(message As IMessage, callback As AsyncCallback, userData As Object) As IClientAsyncResult


Parameters:

  • message:
  • callback:
  • userData:


CheckChannelBusy   protected     (declared in ClientChannel)



Oxygene:   method CheckChannelBusy
C#:   void CheckChannelBusy()
VB:   Sub CheckChannelBusy


Clone

Creates and returns a new NamedPipeClientChannel instance that is an identical copy of the current channel.


Oxygene:   method Clone: Object
C#:   Object Clone()
VB:   Function Clone As Object


CopyProperties (Channel)   protected     (declared in Channel)



Oxygene:   method CopyProperties(source: Channel)
C#:   void CopyProperties(Channel source)
VB:   Sub CopyProperties(source As Channel)


Parameters:

  • source:


CopyProperties (ClientChannel)   protected

Copies the properties from the given client channel.


Oxygene:   method CopyProperties(source: ClientChannel)
C#:   void CopyProperties(ClientChannel source)
VB:   Sub CopyProperties(source As ClientChannel)


Parameters:

  • source:


Dispatch     (declared in ClientChannel)

The implementation of IClientChannel.Dispatch. This method ensures the transport is not busy before calling IntDispatch and passing the given IMessage. If the transport is busy, a ChannelBusyException is thrown.


Oxygene:   method Dispatch(message: IMessage)
C#:   void Dispatch(IMessage message)
VB:   Sub Dispatch(message As IMessage)


Parameters:

  • message:


EndDispatch     (declared in ClientChannel)



Oxygene:   method EndDispatch(ar: IAsyncResult): IMessage
C#:   IMessage EndDispatch(IAsyncResult ar)
VB:   Function EndDispatch(ar As IAsyncResult) As IMessage


Parameters:

  • ar:


IntDispatch   protected

This method connects to the server, using Path and Server values, dispatches request messages to the server for processing and eventually gets a response stream back.


Oxygene:   method IntDispatch(request: Stream; response: IMessage)
C#:   void IntDispatch(Stream request, IMessage response)
VB:   Sub IntDispatch(request As Stream, response As IMessage)


Parameters:

  • request:
  • response:


TriggerAfterReceiveStream   protected     (declared in Channel)



Oxygene:   method TriggerAfterReceiveStream(var stream: Stream)
C#:   void TriggerAfterReceiveStream(ref Stream stream)
VB:   Sub TriggerAfterReceiveStream(ByRef stream As Stream)


Parameters:

  • stream:


TriggerBeforeSendStream   protected     (declared in Channel)



Oxygene:   method TriggerBeforeSendStream(var stream: Stream)
C#:   void TriggerBeforeSendStream(ref Stream stream)
VB:   Sub TriggerBeforeSendStream(ByRef stream As Stream)


Parameters:

  • stream:


TriggerOnException   protected     (declared in ClientChannel)



Oxygene:   method TriggerOnException(exception: Exception; out handled: Boolean)
C#:   void TriggerOnException(Exception exception, out Boolean handled)
VB:   Sub TriggerOnException(exception As Exception, <OutAttribute> ByRef handled As Boolean)


Parameters:

  • exception:
  • handled:


TriggerOnLoginNeeded   protected     (declared in ClientChannel)



Oxygene:   method TriggerOnLoginNeeded(exception: Exception; out loginSuccessful: Boolean)
C#:   void TriggerOnLoginNeeded(Exception exception, out Boolean loginSuccessful)
VB:   Sub TriggerOnLoginNeeded(exception As Exception, <OutAttribute> ByRef loginSuccessful As Boolean)


Parameters:

  • exception:
  • loginSuccessful:


TriggerOnTransferEnd   protected     (declared in ClientChannel)



Oxygene:   method TriggerOnTransferEnd(direction: TransferDirection)
C#:   void TriggerOnTransferEnd(TransferDirection direction)
VB:   Sub TriggerOnTransferEnd(direction As TransferDirection)


Parameters:

  • direction:


TriggerOnTransferProgress   protected     (declared in ClientChannel)



Oxygene:   method TriggerOnTransferProgress(direction: TransferDirection; current: Int64)
C#:   void TriggerOnTransferProgress(TransferDirection direction, Int64 current)
VB:   Sub TriggerOnTransferProgress(direction As TransferDirection, current As Int64)


Parameters:

  • direction:
  • current:


TriggerOnTransferStart   protected     (declared in ClientChannel)



Oxygene:   method TriggerOnTransferStart(direction: TransferDirection; total: Int64)
C#:   void TriggerOnTransferStart(TransferDirection direction, Int64 total)
VB:   Sub TriggerOnTransferStart(direction As TransferDirection, total As Int64)


Parameters:

  • direction:
  • total:


Events

AfterReceiveStream     (declared in Channel)

This event is triggered by client and server channels directly after a request or response stream has been received and before the stream gets parsed into a message. User code can assign handlers to this event to process, inspect or modify incoming messages, before they get handled by the RemObjects SDK framework. The passed Stream is a MemoryStream and may be modified.

If no handlers are assigned to the AfterReceiveStream event, the message will load the data directly from the incoming medium (usually the network stream); assigning event handlers to AfterReceiveStream will induce a slight overhead as the data will first be copied into a local memory buffer for the event handler. This should not have any noticeably effect except for very large messages or on resource-limited systems such as Compact Framework Clients, but if utmost performance is important, take this note into consideration.



Oxygene:   event AfterReceiveStream: StreamEventHandler
delegate: method Invoke(sender: Object; e: StreamEventArgs)

C#:   event StreamEventHandler AfterReceiveStream
delegate: void Invoke(Object sender, StreamEventArgs e)

VB:   Event AfterReceiveStream As StreamEventHandler
delegate: Sub Invoke(sender As Object, e As StreamEventArgs)


BeforeSendStream     (declared in Channel)

This event is triggered by client and server channels directly before a request or response stream will be sent over the network. User code can assign handlers to this event to process, inspect or modify incoming messages before they get sent out to the remote system.

The passed Stream is a MemoryStream and may be modified.



Oxygene:   event BeforeSendStream: StreamEventHandler
delegate: method Invoke(sender: Object; e: StreamEventArgs)

C#:   event StreamEventHandler BeforeSendStream
delegate: void Invoke(Object sender, StreamEventArgs e)

VB:   Event BeforeSendStream As StreamEventHandler
delegate: Sub Invoke(sender As Object, e As StreamEventArgs)


OnException     (declared in ClientChannel)

This event is raised if an exception occurs during the execution of a remote request through the channel. The event will be raised both for exceptions originating from the server and for exceptions during communication (such as unavailability of the server). Attach a handler to this event to do custom handling of events without having to reply on explicit try/catch blocks in the calling code.


This event will not be raised for SessionNotFoundExceptions. These will be handled separately by the OnLoginNeeded event.



Oxygene:   event OnException: RequestExceptionEventHandler
delegate: method Invoke(sender: Object; e: RequestExceptionEventArgs)

C#:   event RequestExceptionEventHandler OnException
delegate: void Invoke(Object sender, RequestExceptionEventArgs e)

VB:   Event OnException As RequestExceptionEventHandler
delegate: Sub Invoke(sender As Object, e As RequestExceptionEventArgs)


OnLoginNeeded     (declared in ClientChannel)

This event is raised if an SessionNotFoundException occurs during the execution of a remote request through the channel. The event gives you the opportunity to perform a login on the server (for example by calling a custom Login method, and then retry the call by setting the EventArgs' LoginSuccessful property to true. This way, your client can recover from a timed-out session to automatically logging in again, without the calling code having to consider the handling of SessionNotFoundExceptions manually.



Oxygene:   event OnLoginNeeded: LoginNeededEventHandler
delegate: method Invoke(sender: Object; e: LoginNeededEventArgs)

C#:   event LoginNeededEventHandler OnLoginNeeded
delegate: void Invoke(Object sender, LoginNeededEventArgs e)

VB:   Event OnLoginNeeded As LoginNeededEventHandler
delegate: Sub Invoke(sender As Object, e As LoginNeededEventArgs)


OnTransferEnd     (declared in ClientChannel)

This event is triggered by the client channel after a transfer is completed (either the sending of a request or the receiving of a response).



Oxygene:   event OnTransferEnd: TransferEndEventHandler
delegate: method Invoke(sender: Object; e: TransferEndEventArgs)

C#:   event TransferEndEventHandler OnTransferEnd
delegate: void Invoke(Object sender, TransferEndEventArgs e)

VB:   Event OnTransferEnd As TransferEndEventHandler
delegate: Sub Invoke(sender As Object, e As TransferEndEventArgs)


OnTransferProgress     (declared in ClientChannel)

This event is triggered by the client channel during a transfer (either the sending of a request or the receiving of a response) whenever a new block of data has been sent or received.



Oxygene:   event OnTransferProgress: TransferProgressEventHandler
delegate: method Invoke(sender: Object; e: TransferProgressEventArgs)

C#:   event TransferProgressEventHandler OnTransferProgress
delegate: void Invoke(Object sender, TransferProgressEventArgs e)

VB:   Event OnTransferProgress As TransferProgressEventHandler
delegate: Sub Invoke(sender As Object, e As TransferProgressEventArgs)


OnTransferStart     (declared in ClientChannel)

This event is triggered by the client channel when a transfer (either the sending of a request or the receiving of a response) is about to be started.



Oxygene:   event OnTransferStart: TransferStartEventHandler
delegate: method Invoke(sender: Object; e: TransferStartEventArgs)

C#:   event TransferStartEventHandler OnTransferStart
delegate: void Invoke(Object sender, TransferStartEventArgs e)

VB:   Event OnTransferStart As TransferStartEventHandler
delegate: Sub Invoke(sender As Object, e As TransferStartEventArgs)


See Also


Product: RemObjects SDK
Available Editions: RemObjects SDK for .NET, Xcode, Delphi, Java and JavaScript

Glossary — Articles — Library — Samples

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