Вот небольшой помощник, который я написал.
Чтобы использовать его:
var pipeListener = new NamedPipeListener<String>(); // instantiate an instance
pipeListener.MessageReceived += (sender, e) => MessageBox.Show(e.Message); // when a message is received, show a messagebox with the message
pipeListener.Error += (sender, e) => MessageBox.Show("Error ({0}): {1}", e.ErrorType, e.Exception.Message); // oh noes!
pipeListener.Start(); // when you're ready, start listening
Из другого процесса:
NamedPipeListener<String>.SendMessage("Howdy howdy howdy");
Обратите внимание, что он использует полное имяPipeListener в качестве имени канала по умолчанию.Если вам нужно быть более осторожным, используйте перегрузку конструктора, которая принимает имя канала.
Вот класс:
using System;
using System.IO.Pipes;
using System.Runtime.Serialization.Formatters.Binary;
namespace FunWithNamedPipes
{
/// <summary>Contains event data for <see cref="NamedPipeMessageReceiveHandler{TMessage}" /> events.</summary>
/// <typeparam name="TMessage"></typeparam>
public class NamedPipeListenerMessageReceivedEventArgs<TMessage> : EventArgs
{
/// <summary>Initializes an instance of <see cref="NamedPipeListenerMessageReceivedEventArgs{TMessage}" /> with the specified <paramref name="message" />.</summary>
/// <param name="message">The message passed by the event.</param>
public NamedPipeListenerMessageReceivedEventArgs(TMessage message)
{
this.Message = message;
}
/// <summary>Gets the message passed by the event.</summary>
public TMessage Message { get; private set; }
}
/// <summary>Contains event data for <see cref="NamedPipeListenerErrorEventHandler" /> events.</summary>
public class NamedPipeListenerErrorEventArgs : EventArgs
{
/// <summary>Initializes an instance of <see cref="NamedPipeListenerErrorEventArgs" /> with the specified <paramref name="errorType" /> and <paramref name="exception" />.</summary>
/// <param name="errorType">A <see cref="NamedPipeListenerErrorType" /> describing the part of the listener process where the error was caught.</param>
/// <param name="ex">The <see cref="Exception" /> that was thrown.</param>
public NamedPipeListenerErrorEventArgs(NamedPipeListenerErrorType errorType, Exception ex)
{
this.ErrorType = errorType;
this.Exception = ex;
}
/// <summary>Gets a <see cref="NamedPipeListenerErrorType" /> describing the part of the listener process where the error was caught.</summary>
public NamedPipeListenerErrorType ErrorType { get; private set; }
/// <summary>Gets the <see cref="Exception" /> that was caught.</summary>
public Exception Exception { get; private set; }
}
/// <summary>Represents a method that will handle an event where a message is received via named pipes.</summary>
/// <typeparam name="TMessage">The type of message that will be received.</typeparam>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event data passed by the event, which includes the message that was received.</param>
public delegate void NamedPipeMessageReceivedHandler<TMessage>(Object sender, NamedPipeListenerMessageReceivedEventArgs<TMessage> e);
/// <summary>Represents a method that will handle an event that is fired when an exception is caught.</summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event data passed by the event, included the error type and exception that was caught.</param>
public delegate void NamedPipeMessageErrorHandler(Object sender, NamedPipeListenerErrorEventArgs e);
/// <summary>Includes different types of errors that describe where in the listening process an exception was caught.</summary>
public enum NamedPipeListenerErrorType : byte
{
/// <summary>Indicates that an exception was caught while calling <see cref="NamedPipeServerStream.BeginWaitForConnection" />.</summary>
BeginWaitForConnection = 1,
/// <summary>Indicates that an exception was caught while calling <see cref="NamedPipeServerStream.EndWaitForConnection" />.</summary>
EndWaitForConnection = 2,
/// <summary>Indicates that an exception was caught while deserializing a message received from the named pipe.</summary>
DeserializeMessage = 3,
/// <summary>Indicates that an exception was caught while closing or disposing a used named pipe.</summary>
CloseAndDisposePipe = 4,
/// <summary>Indicates that an exception was caught while invoking the <see cref="NamedPipeListener{TMessage}.MessageReceived"/> event.</summary>
NotifyMessageReceived = 5
}
/// <summary>A helper class for sending and receiving messages using named pipes.</summary>
/// <typeparam name="TMessage">The type of message that will be sent or received.</typeparam>
public class NamedPipeListener<TMessage> : IDisposable
{
/// <summary>Occurs when a message is received.</summary>
public event NamedPipeMessageReceivedHandler<TMessage> MessageReceived;
/// <summary>Occurs when an exception is caught.</summary>
public event NamedPipeMessageErrorHandler Error;
static readonly String DEFAULT_PIPENAME = typeof(NamedPipeListener<TMessage>).FullName;
static readonly BinaryFormatter formatter = new BinaryFormatter();
NamedPipeServerStream pipeServer;
/// <summary>Initializes a new instance of <see cref="NamedPipeListener{TMessage}" /> using the specified <paramref name="pipeName" />.</summary>
/// <param name="pipeName">The name of the named pipe that will be used to listen on.</param>
public NamedPipeListener(String pipeName)
{
this.PipeName = pipeName;
}
/// <summary>Initializes a new instance of <see cref="NamedPipeListener{TMessage}" /> using the default pipe name.</summary>
/// <remarks>The default pipe name is the full name of the type of the instance.</remarks>
public NamedPipeListener()
: this(DEFAULT_PIPENAME) { }
/// <summary>The name of the named pipe that will be used to listen on.</summary>
public String PipeName { get; private set; }
/// <summary>Starts listening on the named pipe specified for the instance.</summary>
internal void Start()
{
if (pipeServer == null) pipeServer = new NamedPipeServerStream(DEFAULT_PIPENAME, PipeDirection.In, 1, PipeTransmissionMode.Message, PipeOptions.Asynchronous);
try { pipeServer.BeginWaitForConnection(new AsyncCallback(PipeConnectionCallback), null); }
catch (Exception ex) { this.OnError(NamedPipeListenerErrorType.BeginWaitForConnection, ex); }
}
private void PipeConnectionCallback(IAsyncResult result)
{
try
{
pipeServer.EndWaitForConnection(result);
}
catch (Exception ex)
{
this.OnError(NamedPipeListenerErrorType.EndWaitForConnection, ex);
return;
}
TMessage message;
try
{
message = (TMessage)formatter.Deserialize(pipeServer);
}
catch (Exception ex)
{
this.OnError(NamedPipeListenerErrorType.DeserializeMessage, ex);
return;
}
try
{
this.OnMessageReceived(new NamedPipeListenerMessageReceivedEventArgs<TMessage>(message));
}
catch (Exception ex)
{
this.OnError(NamedPipeListenerErrorType.NotifyMessageReceived, ex);
return;
}
if (this.End())
{
this.Start();
}
}
internal Boolean End()
{
try
{
pipeServer.Close();
pipeServer.Dispose();
pipeServer = null;
return true;
}
catch (Exception ex)
{
this.OnError(NamedPipeListenerErrorType.CloseAndDisposePipe, ex);
return false;
}
}
private void OnMessageReceived(TMessage message)
{
this.OnMessageReceived(new NamedPipeListenerMessageReceivedEventArgs<TMessage>(message));
}
protected virtual void OnMessageReceived(NamedPipeListenerMessageReceivedEventArgs<TMessage> e)
{
if (this.MessageReceived != null)
{
this.MessageReceived(this, e);
}
}
private void OnError(NamedPipeListenerErrorType errorType, Exception ex)
{
this.OnError(new NamedPipeListenerErrorEventArgs(errorType, ex));
}
protected virtual void OnError(NamedPipeListenerErrorEventArgs e)
{
if (this.Error != null)
{
this.Error(this, e);
}
}
void IDisposable.Dispose()
{
if(pipeServer != null)
{
try { pipeServer.Disconnect(); }
catch { }
try { pipeServer.Close(); }
catch { }
try { pipeServer.Dispose(); }
catch { }
}
}
/// <summary>Sends the specified <paramref name="message" /> to the default named pipe for the message.</summary>
/// <param name="message">The message to send.</param>
public static void SendMessage(TMessage message)
{
NamedPipeListener<TMessage>.SendMessage(DEFAULT_PIPENAME, message);
}
/// <summary>Sends the specified <paramref name="message" /> to the specified named pipe.</summary>
/// <param name="pipeName">The name of the named pipe the message will be sent to.</param>
/// <param name="message">The message to send.</param>
public static void SendMessage(String pipeName, TMessage message)
{
using (var pipeClient = new NamedPipeClientStream(".", DEFAULT_PIPENAME, PipeDirection.Out, PipeOptions.None))
{
pipeClient.Connect();
formatter.Serialize(pipeClient, message);
pipeClient.Flush();
pipeClient.WaitForPipeDrain();
pipeClient.Close();
}
}
}
}