AnonymousPipeClientStream AnonymousPipeClientStream AnonymousPipeClientStream AnonymousPipeClientStream Class

Definition

Exposes the client side of an anonymous pipe stream, which supports both synchronous and asynchronous read and write operations.

public ref class AnonymousPipeClientStream sealed : System::IO::Pipes::PipeStream
public sealed class AnonymousPipeClientStream : System.IO.Pipes.PipeStream
type AnonymousPipeClientStream = class
    inherit PipeStream
Public NotInheritable Class AnonymousPipeClientStream
Inherits PipeStream
Inheritance

Examples

The following example demonstrates a way to send a string from a parent process to a child process by using anonymous pipes. This example creates an AnonymousPipeServerStream object in a parent process with a PipeDirection value of Out. It also creates an AnonymousPipeClientStream object in a child process with a PipeDirection value of In. The parent process then sends a user-supplied string to the child process. The string is displayed to the console.

This example is for the client process, which is started by the server process. Name the resulting executable from the client code pipeClient.exe and copy it to the same directory as the server executable when you run this example. For the entire code example, including the code for both the pipe client and server, see How to: Use Anonymous Pipes for Local Interprocess Communication.

#using <System.Core.dll>

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

ref class PipeClient
{
public:
    static void Main(array<String^>^ args)
    {
        if (args->Length > 1)
        {
            PipeStream^ pipeClient = gcnew AnonymousPipeClientStream(PipeDirection::In, args[1]);
            // Show that anonymous Pipes do not support Message mode.
            try
            {
                Console::WriteLine("[CLIENT] Setting ReadMode to \"Message\".");
                pipeClient->ReadMode = PipeTransmissionMode::Message;
            }
            catch (NotSupportedException^ e)
            {
                Console::WriteLine("[CLIENT] Execption:\n    {0}", e->Message);
            }

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

            StreamReader^ sr = gcnew StreamReader(pipeClient);

            // Display the read text to the console
            String^ temp;

            // Wait for 'sync message' from the server.
            do
            {
                Console::WriteLine("[CLIENT] Wait for sync...");
                temp = sr->ReadLine();
            }
            while (!temp->StartsWith("SYNC"));

            // Read the server data and echo to the console.
            while ((temp = sr->ReadLine()) != nullptr)
            {
                Console::WriteLine("[CLIENT] Echo: " + temp);
            }
            sr->Close();
            pipeClient->Close();
        }
        Console::Write("[CLIENT] Press Enter to continue...");
        Console::ReadLine();
    }
};

int main()
{
    array<String^>^ args = Environment::GetCommandLineArgs();
    PipeClient::Main(args);
}
using System;
using System.IO;
using System.IO.Pipes;

class PipeClient
{
    static void Main(string[] args)
    {
        if (args.Length > 0)
        {
            using (PipeStream pipeClient =
                new AnonymousPipeClientStream(PipeDirection.In, args[0]))
            {
                // Show that anonymous Pipes do not support Message mode.
                try
                {
                    Console.WriteLine("[CLIENT] Setting ReadMode to \"Message\".");
                    pipeClient.ReadMode = PipeTransmissionMode.Message;
                }
                catch (NotSupportedException e)
                {
                    Console.WriteLine("[CLIENT] Execption:\n    {0}", e.Message);
                }

                Console.WriteLine("[CLIENT] Current TransmissionMode: {0}.",
                   pipeClient.TransmissionMode);

                using (StreamReader sr = new StreamReader(pipeClient))
                {
                    // Display the read text to the console
                    string temp;

                    // Wait for 'sync message' from the server.
                    do
                    {
                        Console.WriteLine("[CLIENT] Wait for sync...");
                        temp = sr.ReadLine();
                    }
                    while (!temp.StartsWith("SYNC"));

                    // Read the server data and echo to the console.
                    while ((temp = sr.ReadLine()) != null)
                    {
                        Console.WriteLine("[CLIENT] Echo: " + temp);
                    }
                }
            }
        }
        Console.Write("[CLIENT] Press Enter to continue...");
        Console.ReadLine();
    }
}
Imports System
Imports System.IO
Imports System.IO.Pipes

Class PipeClient
    Shared Sub Main(args() as String)
        If args.Length > 0 Then
            Using pipeClient As New AnonymousPipeClientStream(PipeDirection.In, args(0))
                ' Show that anonymous Pipes do not support Message mode.
                Try
                    Console.WriteLine("[CLIENT] Setting ReadMode to ""Message"".")
                    pipeClient.ReadMode = PipeTransmissionMode.Message
                Catch e As NotSupportedException
                    Console.WriteLine("[CLIENT] Execption:" + vbNewLine + "    {0}", e.Message)
                End Try

                Console.WriteLine("[CLIENT] Current TransmissionMode: {0}.", _
                   pipeClient.TransmissionMode)

                Using sr As New StreamReader(pipeClient)
                    ' Display the read text to the console
                    Dim temp As String

                    ' Wait for 'sync message' from the server.
                    Do
                        Console.WriteLine("[CLIENT] Wait for sync...")
                        temp = sr.ReadLine()
                    Loop While temp.StartsWith("SYNC") = False

                    ' Read the server data and echo to the console.
                    temp = sr.ReadLine()
                    While Not temp = Nothing
                        Console.WriteLine("[CLIENT] Echo: " + temp)
                        temp = sr.ReadLine()
                    End While
                End Using
            End Using
        End If
        Console.Write("[CLIENT] Press Enter to continue...")
        Console.ReadLine()
    End Sub
End Class

Remarks

Anonymous pipes help provide safe and secure interprocess communication between child and parent processes. The AnonymousPipeClientStream class enables a child process to connect to and exchange information with a parent process.

Anonymous pipes are unnamed, one-way pipes that typically transfer data between parent and child processes. Anonymous pipes are always local; they cannot be used over a network. A PipeDirection value of InOut is not supported because anonymous pipes are defined to be one-way.

Anonymous pipes do not support Message read modes.

The client side of an anonymous pipe must be created from a pipe handle provided by the server side by calling the GetClientHandleAsString method. The string is then passed as a parameter when creating the client process. From the client process, it is passed to the AnonymousPipeClientStream constructor as the pipeHandleAsString parameter.

Note

For Windows XP Professional and Windows 2000 Server, a maximum of 10 pipes can simultaneously connect over the network.

Constructors

AnonymousPipeClientStream(PipeDirection, SafePipeHandle) AnonymousPipeClientStream(PipeDirection, SafePipeHandle) AnonymousPipeClientStream(PipeDirection, SafePipeHandle) AnonymousPipeClientStream(PipeDirection, SafePipeHandle)

Initializes a new instance of the AnonymousPipeClientStream class from the specified handle.

AnonymousPipeClientStream(PipeDirection, String) AnonymousPipeClientStream(PipeDirection, String) AnonymousPipeClientStream(PipeDirection, String) AnonymousPipeClientStream(PipeDirection, String)

Initializes a new instance of the AnonymousPipeClientStream class with the specified pipe direction and a string representation of the pipe handle.

AnonymousPipeClientStream(String) AnonymousPipeClientStream(String) AnonymousPipeClientStream(String) AnonymousPipeClientStream(String)

Initializes a new instance of the AnonymousPipeClientStream class with the specified string representation of the pipe handle.

Properties

CanRead CanRead CanRead CanRead

Gets a value indicating whether the current stream supports read operations.

(Inherited from PipeStream)
CanSeek CanSeek CanSeek CanSeek

Gets a value indicating whether the current stream supports seek operations.

(Inherited from PipeStream)
CanTimeout CanTimeout CanTimeout CanTimeout

Gets a value that determines whether the current stream can time out.

(Inherited from Stream)
CanWrite CanWrite CanWrite CanWrite

Gets a value indicating whether the current stream supports write operations.

(Inherited from PipeStream)
InBufferSize InBufferSize InBufferSize InBufferSize

Gets the size, in bytes, of the inbound buffer for a pipe.

(Inherited from PipeStream)
IsAsync IsAsync IsAsync IsAsync

Gets a value indicating whether a PipeStream object was opened asynchronously or synchronously.

(Inherited from PipeStream)
IsConnected IsConnected IsConnected IsConnected

Gets or sets a value indicating whether a PipeStream object is connected.

(Inherited from PipeStream)
IsHandleExposed IsHandleExposed IsHandleExposed IsHandleExposed

Gets a value indicating whether a handle to a PipeStream object is exposed.

(Inherited from PipeStream)
IsMessageComplete IsMessageComplete IsMessageComplete IsMessageComplete

Gets a value indicating whether there is more data in the message returned from the most recent read operation.

(Inherited from PipeStream)
Length Length Length Length

Gets the length of a stream, in bytes.

(Inherited from PipeStream)
OutBufferSize OutBufferSize OutBufferSize OutBufferSize

Gets the size, in bytes, of the outbound buffer for a pipe.

(Inherited from PipeStream)
Position Position Position Position

Gets or sets the current position of the current stream.

(Inherited from PipeStream)
ReadMode ReadMode ReadMode ReadMode

Sets the reading mode for the AnonymousPipeClientStream object.

ReadTimeout ReadTimeout ReadTimeout ReadTimeout

Gets or sets a value, in miliseconds, that determines how long the stream will attempt to read before timing out.

(Inherited from Stream)
SafePipeHandle SafePipeHandle SafePipeHandle SafePipeHandle

Gets the safe handle for the local end of the pipe that the current PipeStream object encapsulates.

(Inherited from PipeStream)
TransmissionMode TransmissionMode TransmissionMode TransmissionMode

Gets the pipe transmission mode supported by the current pipe.

WriteTimeout WriteTimeout WriteTimeout WriteTimeout

Gets or sets a value, in miliseconds, that determines how long the stream will attempt to write before timing out.

(Inherited from Stream)

Methods

BeginRead(Byte[], Int32, Int32, AsyncCallback, Object) BeginRead(Byte[], Int32, Int32, AsyncCallback, Object) BeginRead(Byte[], Int32, Int32, AsyncCallback, Object) BeginRead(Byte[], Int32, Int32, AsyncCallback, Object)

Begins an asynchronous read operation.

(Inherited from PipeStream)
BeginWrite(Byte[], Int32, Int32, AsyncCallback, Object) BeginWrite(Byte[], Int32, Int32, AsyncCallback, Object) BeginWrite(Byte[], Int32, Int32, AsyncCallback, Object) BeginWrite(Byte[], Int32, Int32, AsyncCallback, Object)

Begins an asynchronous write operation.

(Inherited from PipeStream)
CheckPipePropertyOperations() CheckPipePropertyOperations() CheckPipePropertyOperations() CheckPipePropertyOperations()

Verifies that the pipe is in a proper state for getting or setting properties.

(Inherited from PipeStream)
CheckReadOperations() CheckReadOperations() CheckReadOperations() CheckReadOperations()

Verifies that the pipe is in a connected state for read operations.

(Inherited from PipeStream)
CheckWriteOperations() CheckWriteOperations() CheckWriteOperations() CheckWriteOperations()

Verifies that the pipe is in a connected state for write operations.

(Inherited from PipeStream)
Close() Close() Close() Close()

Closes the current stream and releases any resources (such as sockets and file handles) associated with the current stream. Instead of calling this method, ensure that the stream is properly disposed.

(Inherited from Stream)
CopyTo(Stream) CopyTo(Stream) CopyTo(Stream) CopyTo(Stream)

Reads the bytes from the current stream and writes them to another stream.

(Inherited from Stream)
CopyTo(Stream, Int32) CopyTo(Stream, Int32) CopyTo(Stream, Int32) CopyTo(Stream, Int32)

Reads the bytes from the current stream and writes them to another stream, using a specified buffer size.

(Inherited from Stream)
CopyToAsync(Stream) CopyToAsync(Stream) CopyToAsync(Stream) CopyToAsync(Stream)

Asynchronously reads the bytes from the current stream and writes them to another stream.

(Inherited from Stream)
CopyToAsync(Stream, CancellationToken) CopyToAsync(Stream, CancellationToken) CopyToAsync(Stream, CancellationToken) CopyToAsync(Stream, CancellationToken) Inherited from Stream
CopyToAsync(Stream, Int32) CopyToAsync(Stream, Int32) CopyToAsync(Stream, Int32) CopyToAsync(Stream, Int32)

Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified buffer size.

(Inherited from Stream)
CopyToAsync(Stream, Int32, CancellationToken) CopyToAsync(Stream, Int32, CancellationToken) CopyToAsync(Stream, Int32, CancellationToken) CopyToAsync(Stream, Int32, CancellationToken)

Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified buffer size and cancellation token.

(Inherited from Stream)
CreateObjRef(Type) CreateObjRef(Type) CreateObjRef(Type) CreateObjRef(Type)

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.

(Inherited from MarshalByRefObject)
CreateWaitHandle() CreateWaitHandle() CreateWaitHandle() CreateWaitHandle()

Allocates a WaitHandle object.

(Inherited from Stream)
Dispose() Dispose() Dispose() Dispose()

Releases all resources used by the Stream.

(Inherited from Stream)
Dispose(Boolean) Dispose(Boolean) Dispose(Boolean) Dispose(Boolean)

Releases the unmanaged resources used by the PipeStream class and optionally releases the managed resources.

(Inherited from PipeStream)
EndRead(IAsyncResult) EndRead(IAsyncResult) EndRead(IAsyncResult) EndRead(IAsyncResult)

Ends a pending asynchronous read request.

(Inherited from PipeStream)
EndWrite(IAsyncResult) EndWrite(IAsyncResult) EndWrite(IAsyncResult) EndWrite(IAsyncResult)

Ends a pending asynchronous write request.

(Inherited from PipeStream)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
Finalize() Finalize() Finalize() Finalize()

Releases unmanaged resources and performs other cleanup operations before the AnonymousPipeClientStream instance is reclaimed by garbage collection.

Flush() Flush() Flush() Flush()

Clears the buffer for the current stream and causes any buffered data to be written to the underlying device.

(Inherited from PipeStream)
FlushAsync() FlushAsync() FlushAsync() FlushAsync()

Asynchronously clears all buffers for this stream and causes any buffered data to be written to the underlying device.

(Inherited from Stream)
FlushAsync(CancellationToken) FlushAsync(CancellationToken) FlushAsync(CancellationToken) FlushAsync(CancellationToken)

Asynchronously clears all buffers for this stream, causes any buffered data to be written to the underlying device, and monitors cancellation requests.

(Inherited from Stream)
GetAccessControl() GetAccessControl() GetAccessControl() GetAccessControl()

Gets a PipeSecurity object that encapsulates the access control list (ACL) entries for the pipe described by the current PipeStream object.

(Inherited from PipeStream)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetLifetimeService() GetLifetimeService() GetLifetimeService() GetLifetimeService()

Retrieves the current lifetime service object that controls the lifetime policy for this instance.

(Inherited from MarshalByRefObject)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
InitializeHandle(SafePipeHandle, Boolean, Boolean) InitializeHandle(SafePipeHandle, Boolean, Boolean) InitializeHandle(SafePipeHandle, Boolean, Boolean) InitializeHandle(SafePipeHandle, Boolean, Boolean)

Initializes a PipeStream object from the specified SafePipeHandle object.

(Inherited from PipeStream)
InitializeLifetimeService() InitializeLifetimeService() InitializeLifetimeService() InitializeLifetimeService()

Obtains a lifetime service object to control the lifetime policy for this instance.

(Inherited from MarshalByRefObject)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
MemberwiseClone(Boolean) MemberwiseClone(Boolean) MemberwiseClone(Boolean) MemberwiseClone(Boolean)

Creates a shallow copy of the current MarshalByRefObject object.

(Inherited from MarshalByRefObject)
ObjectInvariant() ObjectInvariant() ObjectInvariant() ObjectInvariant()

Provides support for a Contract.

(Inherited from Stream)
Read(Byte[], Int32, Int32) Read(Byte[], Int32, Int32) Read(Byte[], Int32, Int32) Read(Byte[], Int32, Int32)

Reads a block of bytes from a stream and writes the data to a specified buffer.

(Inherited from PipeStream)
Read(Span<Byte>) Read(Span<Byte>) Read(Span<Byte>) Read(Span<Byte>) Inherited from Stream
ReadAsync(Byte[], Int32, Int32) ReadAsync(Byte[], Int32, Int32) ReadAsync(Byte[], Int32, Int32) ReadAsync(Byte[], Int32, Int32)

Asynchronously reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read.

(Inherited from Stream)
ReadAsync(Byte[], Int32, Int32, CancellationToken) ReadAsync(Byte[], Int32, Int32, CancellationToken) ReadAsync(Byte[], Int32, Int32, CancellationToken) ReadAsync(Byte[], Int32, Int32, CancellationToken) Inherited from PipeStream
ReadAsync(Memory<Byte>, CancellationToken) ReadAsync(Memory<Byte>, CancellationToken) ReadAsync(Memory<Byte>, CancellationToken) ReadAsync(Memory<Byte>, CancellationToken) Inherited from Stream
ReadByte() ReadByte() ReadByte() ReadByte()

Reads a byte from a pipe.

(Inherited from PipeStream)
Seek(Int64, SeekOrigin) Seek(Int64, SeekOrigin) Seek(Int64, SeekOrigin) Seek(Int64, SeekOrigin)

Sets the current position of the current stream to the specified value.

(Inherited from PipeStream)
SetAccessControl(PipeSecurity) SetAccessControl(PipeSecurity) SetAccessControl(PipeSecurity) SetAccessControl(PipeSecurity)

Applies the access control list (ACL) entries specified by a PipeSecurity object to the pipe specified by the current PipeStream object.

(Inherited from PipeStream)
SetLength(Int64) SetLength(Int64) SetLength(Int64) SetLength(Int64)

Sets the length of the current stream to the specified value.

(Inherited from PipeStream)
ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)
WaitForPipeDrain() WaitForPipeDrain() WaitForPipeDrain() WaitForPipeDrain()

Waits for the other end of the pipe to read all sent bytes.

(Inherited from PipeStream)
Write(Byte[], Int32, Int32) Write(Byte[], Int32, Int32) Write(Byte[], Int32, Int32) Write(Byte[], Int32, Int32)

Writes a block of bytes to the current stream using data from a buffer.

(Inherited from PipeStream)
Write(ReadOnlySpan<Byte>) Write(ReadOnlySpan<Byte>) Write(ReadOnlySpan<Byte>) Write(ReadOnlySpan<Byte>) Inherited from Stream
WriteAsync(Byte[], Int32, Int32) WriteAsync(Byte[], Int32, Int32) WriteAsync(Byte[], Int32, Int32) WriteAsync(Byte[], Int32, Int32)

Asynchronously writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.

(Inherited from Stream)
WriteAsync(Byte[], Int32, Int32, CancellationToken) WriteAsync(Byte[], Int32, Int32, CancellationToken) WriteAsync(Byte[], Int32, Int32, CancellationToken) WriteAsync(Byte[], Int32, Int32, CancellationToken) Inherited from PipeStream
WriteAsync(ReadOnlyMemory<Byte>, CancellationToken) WriteAsync(ReadOnlyMemory<Byte>, CancellationToken) WriteAsync(ReadOnlyMemory<Byte>, CancellationToken) WriteAsync(ReadOnlyMemory<Byte>, CancellationToken) Inherited from Stream
WriteByte(Byte) WriteByte(Byte) WriteByte(Byte) WriteByte(Byte)

Writes a byte to the current stream.

(Inherited from PipeStream)

Explicit Interface Implementations

IDisposable.Dispose() IDisposable.Dispose() IDisposable.Dispose() IDisposable.Dispose() Inherited from Stream

Extension Methods

GetAccessControl(PipeStream) GetAccessControl(PipeStream) GetAccessControl(PipeStream) GetAccessControl(PipeStream)
SetAccessControl(PipeStream, PipeSecurity) SetAccessControl(PipeStream, PipeSecurity) SetAccessControl(PipeStream, PipeSecurity) SetAccessControl(PipeStream, PipeSecurity)

Applies to