AnonymousPipeServerStream.DisposeLocalCopyOfClientHandle Метод

Определение

Пространство имен:

System.IO.Pipes

Сборка:

System.IO.Pipes.dll

Исходный код:

AnonymousPipeServerStream.cs

Закрывает локальную копию дескриптора объекта AnonymousPipeClientStream.

public:
 void DisposeLocalCopyOfClientHandle();

public void DisposeLocalCopyOfClientHandle ();

member this.DisposeLocalCopyOfClientHandle : unit -> unit

Public Sub DisposeLocalCopyOfClientHandle ()

Примеры

В следующем примере показан способ отправки строки из родительского процесса в дочерний процесс с помощью анонимных каналов. В этом примере объект AnonymousPipeServerStream создается в родительском процессе со значением PipeDirectionOut.

//<snippet01>
#using <System.dll>
#using <System.Core.dll>

using namespace System;
using namespace System::IO;
using namespace System::IO::Pipes;
using namespace System::Diagnostics;

ref class PipeServer
{
public:
    static void Main()
    {
        Process^ pipeClient = gcnew Process();

        pipeClient->StartInfo->FileName = "pipeClient.exe";

        AnonymousPipeServerStream^ pipeServer =
            gcnew AnonymousPipeServerStream(PipeDirection::Out,
            HandleInheritability::Inheritable);

        Console::WriteLine("[SERVER] Current TransmissionMode: {0}.",
            pipeServer->TransmissionMode);

        // Pass the client process a handle to the server.
        pipeClient->StartInfo->Arguments =
            pipeServer->GetClientHandleAsString();
        pipeClient->StartInfo->UseShellExecute = false;
        pipeClient->Start();

        pipeServer->DisposeLocalCopyOfClientHandle();

        try
        {
            // Read user input and send that to the client process.
            StreamWriter^ sw = gcnew StreamWriter(pipeServer);

            sw->AutoFlush = true;
            // Send a 'sync message' and wait for client to receive it.
            sw->WriteLine("SYNC");
            pipeServer->WaitForPipeDrain();
            // Send the console input to the client process.
            Console::Write("[SERVER] Enter text: ");
            sw->WriteLine(Console::ReadLine());
            sw->Close();
        }
        // Catch the IOException that is raised if the pipe is broken
        // or disconnected.
        catch (IOException^ e)
        {
            Console::WriteLine("[SERVER] Error: {0}", e->Message);
        }
        pipeServer->Close();
        pipeClient->WaitForExit();
        pipeClient->Close();
        Console::WriteLine("[SERVER] Client quit. Server terminating.");
    }
};

int main()
{
    PipeServer::Main();
}
//</snippet01>

//<snippet01>
using System;
using System.IO;
using System.IO.Pipes;
using System.Diagnostics;

class PipeServer
{
    static void Main()
    {
        Process pipeClient = new Process();

        pipeClient.StartInfo.FileName = "pipeClient.exe";

        using (AnonymousPipeServerStream pipeServer =
            new AnonymousPipeServerStream(PipeDirection.Out,
            HandleInheritability.Inheritable))
        {
            Console.WriteLine("[SERVER] Current TransmissionMode: {0}.",
                pipeServer.TransmissionMode);

            // Pass the client process a handle to the server.
            pipeClient.StartInfo.Arguments =
                pipeServer.GetClientHandleAsString();
            pipeClient.StartInfo.UseShellExecute = false;
            pipeClient.Start();

            pipeServer.DisposeLocalCopyOfClientHandle();

            try
            {
                // Read user input and send that to the client process.
                using (StreamWriter sw = new StreamWriter(pipeServer))
                {
                    sw.AutoFlush = true;
                    // Send a 'sync message' and wait for client to receive it.
                    sw.WriteLine("SYNC");
                    pipeServer.WaitForPipeDrain();
                    // Send the console input to the client process.
                    Console.Write("[SERVER] Enter text: ");
                    sw.WriteLine(Console.ReadLine());
                }
            }
            // Catch the IOException that is raised if the pipe is broken
            // or disconnected.
            catch (IOException e)
            {
                Console.WriteLine("[SERVER] Error: {0}", e.Message);
            }
        }

        pipeClient.WaitForExit();
        pipeClient.Close();
        Console.WriteLine("[SERVER] Client quit. Server terminating.");
    }
}
//</snippet01>

'<snippet01>
Imports System.IO
Imports System.IO.Pipes
Imports System.Diagnostics

Class PipeServer
    Shared Sub Main()
        Dim pipeClient As New Process()

        pipeClient.StartInfo.FileName = "pipeClient.exe"

        Using pipeServer As New AnonymousPipeServerStream(PipeDirection.Out, _
            HandleInheritability.Inheritable)

            Console.WriteLine("[SERVER] Current TransmissionMode: {0}.",
                pipeServer.TransmissionMode)

            ' Pass the client process a handle to the server.
            pipeClient.StartInfo.Arguments = pipeServer.GetClientHandleAsString()
            pipeClient.StartInfo.UseShellExecute = false
            pipeClient.Start()

            pipeServer.DisposeLocalCopyOfClientHandle()

            Try
                ' Read user input and send that to the client process.
                Using sw As New StreamWriter(pipeServer)
                    sw.AutoFlush = true
                    ' Send a 'sync message' and wait for client to receive it.
                    sw.WriteLine("SYNC")
                    pipeServer.WaitForPipeDrain()
                    ' Send the console input to the client process.
                    Console.Write("[SERVER] Enter text: ")
                    sw.WriteLine(Console.ReadLine())
                End Using
            Catch e As IOException
                ' Catch the IOException that is raised if the pipe is broken
                ' or disconnected.
                Console.WriteLine("[SERVER] Error: {0}", e.Message)
            End Try
        End Using

        pipeClient.WaitForExit()
        pipeClient.Close()
        Console.WriteLine("[SERVER] Client quit. Server terminating.")
    End Sub
End Class
'</snippet01>

Комментарии

Метод DisposeLocalCopyOfClientHandle должен вызываться после того, как дескриптор клиента был передан клиенту. Если этот метод не вызывается, AnonymousPipeServerStream объект не будет получать уведомление, когда клиент удаляет свой PipeStream объект.