HttpWebRequest.EndGetRequestStream Método

Definición

Finaliza una solicitud asincrónica para utilizar un objeto Stream para escribir datos.Ends an asynchronous request for a Stream object to use to write data.

Sobrecargas

EndGetRequestStream(IAsyncResult, TransportContext)

Finaliza una solicitud asincrónica de un objeto Stream que se va a usar para escribir los datos y genera el objeto TransportContext asociado a la secuencia.Ends an asynchronous request for a Stream object to use to write data and outputs the TransportContext associated with the stream.

EndGetRequestStream(IAsyncResult)

Finaliza una solicitud asincrónica para utilizar un objeto Stream para escribir datos.Ends an asynchronous request for a Stream object to use to write data.

EndGetRequestStream(IAsyncResult, TransportContext)

Finaliza una solicitud asincrónica de un objeto Stream que se va a usar para escribir los datos y genera el objeto TransportContext asociado a la secuencia.Ends an asynchronous request for a Stream object to use to write data and outputs the TransportContext associated with the stream.

public:
 System::IO::Stream ^ EndGetRequestStream(IAsyncResult ^ asyncResult, [Runtime::InteropServices::Out] System::Net::TransportContext ^ % context);
public:
 System::IO::Stream ^ EndGetRequestStream(IAsyncResult ^ asyncResult, [Runtime::InteropServices::Out] System::Net::TransportContext ^ % transportContext);
public System.IO.Stream EndGetRequestStream (IAsyncResult asyncResult, out System.Net.TransportContext? context);
public System.IO.Stream EndGetRequestStream (IAsyncResult asyncResult, out System.Net.TransportContext context);
public System.IO.Stream EndGetRequestStream (IAsyncResult asyncResult, out System.Net.TransportContext transportContext);
override this.EndGetRequestStream : IAsyncResult * TransportContext -> System.IO.Stream
override this.EndGetRequestStream : IAsyncResult * TransportContext -> System.IO.Stream
Public Function EndGetRequestStream (asyncResult As IAsyncResult, ByRef context As TransportContext) As Stream
Public Function EndGetRequestStream (asyncResult As IAsyncResult, ByRef transportContext As TransportContext) As Stream

Parámetros

asyncResult
IAsyncResult

Solicitud pendiente de un flujo.The pending request for a stream.

contexttransportContext
TransportContext

TransportContext para Stream.The TransportContext for the Stream.

Devoluciones

Stream

Stream que se utiliza para escribir los datos de la solicitud.A Stream to use to write request data.

Excepciones

La instancia actual no devolvió asyncResult desde una llamada a BeginGetRequestStream(AsyncCallback, Object).asyncResult was not returned by the current instance from a call to BeginGetRequestStream(AsyncCallback, Object).

asyncResult es null.asyncResult is null.

Se llamó previamente a este método mediante asyncResult.This method was called previously using asyncResult.

No se completó la solicitud y no hay ninguna secuencia disponible.The request did not complete, and no stream is available.

Se llamó a Abort() anteriormente.Abort() was previously called.

o bien-or- Error al procesar la solicitud.An error occurred while processing the request.

Comentarios

El EndGetRequestStream método completa una solicitud asincrónica de un flujo Iniciado por el BeginGetRequestStream método y genera el TransportContext objeto asociado a la secuencia.The EndGetRequestStream method completes an asynchronous request for a stream that was started by the BeginGetRequestStream method and outputs the TransportContext associated with the stream. Una vez Stream devuelto el objeto, puede enviar datos con HttpWebRequest mediante el Stream.Write método.After the Stream object has been returned, you can send data with the HttpWebRequest by using the Stream.Write method.

Es posible que algunas aplicaciones que usan la autenticación integrada de Windows con protección ampliada necesiten consultar la capa de transporte usada por HttpWebRequest para recuperar el token de enlace de canal (CBT) del canal TLS subyacente.Some applications that use integrated Windows authentication with extended protection may need to be able to query the transport layer used by HttpWebRequest in order to retrieve the channel binding token (CBT) from the underlying TLS channel. El GetRequestStream método proporciona acceso a esta información para los métodos HTTP que tienen un cuerpo de solicitud ( POST y PUT solicitudes).The GetRequestStream method provides access to this information for HTTP methods which have a request body (POST and PUT requests). Esto solo es necesario si la aplicación está implementando su propia autenticación y necesita acceso a CBT.This is only needed if the application is implementing its own authentication and needs access to the CBT.

Nota

Si una aplicación necesita establecer el valor de la ContentLength propiedad, debe hacerlo antes de recuperar la secuencia y escribir datos en ella.If an application needs to set the value of the ContentLength property, then this must be done before retrieving the stream and writing data to it.

Precaución

Debe llamar al Stream.Close método para cerrar la secuencia y liberar la conexión para su reutilización.You must call the Stream.Close method to close the stream and release the connection for reuse. Si no se cierra el flujo, la aplicación se quedará sin conexión.Failure to close the stream causes your application to run out of connections.

Nota

Este miembro genera información de seguimiento cuando se habilita el seguimiento de red en la aplicación.This member outputs trace information when you enable network tracing in your application. Para obtener más información, consulte seguimiento de red en el .NET Framework.For more information, see Network Tracing in the .NET Framework.

Consulte también

Se aplica a

EndGetRequestStream(IAsyncResult)

Finaliza una solicitud asincrónica para utilizar un objeto Stream para escribir datos.Ends an asynchronous request for a Stream object to use to write data.

public:
 override System::IO::Stream ^ EndGetRequestStream(IAsyncResult ^ asyncResult);
public override System.IO.Stream EndGetRequestStream (IAsyncResult asyncResult);
override this.EndGetRequestStream : IAsyncResult -> System.IO.Stream
Public Overrides Function EndGetRequestStream (asyncResult As IAsyncResult) As Stream

Parámetros

asyncResult
IAsyncResult

Solicitud pendiente de un flujo.The pending request for a stream.

Devoluciones

Stream

Stream que se utiliza para escribir los datos de la solicitud.A Stream to use to write request data.

Excepciones

asyncResult es null.asyncResult is null.

No se completó la solicitud y no hay ninguna secuencia disponible.The request did not complete, and no stream is available.

La instancia actual no devolvió asyncResult desde una llamada a BeginGetRequestStream(AsyncCallback, Object).asyncResult was not returned by the current instance from a call to BeginGetRequestStream(AsyncCallback, Object).

Se llamó previamente a este método mediante asyncResult.This method was called previously using asyncResult.

Se llamó a Abort() anteriormente.Abort() was previously called.

o bien-or- Error al procesar la solicitud.An error occurred while processing the request.

Ejemplos

En el ejemplo de código siguiente EndGetRequestStream se usa el método para finalizar una solicitud asincrónica de una instancia de Stream.The following code example uses the EndGetRequestStream method to end an asynchronous request for a stream instance.

#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::IO;
using namespace System::Text;
using namespace System::Threading;
ref class HttpWebRequestBeginGetRequest
{
public:
   static ManualResetEvent^ allDone = gcnew ManualResetEvent( false );
   static void Main()
   {
      
      // Create a new HttpWebRequest object.
      HttpWebRequest^ request = dynamic_cast<HttpWebRequest^>(WebRequest::Create( "http://www.contoso.com/example.aspx" ));
      
      // Set the ContentType property.
      request->ContentType = "application/x-www-form-urlencoded";
      
      // Set the Method property to 'POST' to post data to the Uri.
      request->Method = "POST";
      
      // Start the asynchronous operation.    
      AsyncCallback^ del = gcnew AsyncCallback(GetRequestStreamCallback);
      request->BeginGetRequestStream( del, request );
      
      // Keep the main thread from continuing while the asynchronous
      // operation completes. A real world application
      // could do something useful such as updating its user interface. 
      allDone->WaitOne();
    }
      

private:
    static void GetRequestStreamCallback(IAsyncResult^ asynchronousResult)
    {
        HttpWebRequest^ request = dynamic_cast<HttpWebRequest^>(asynchronousResult->AsyncState);
        
        // End the operation
        Stream^ postStream = request->EndGetRequestStream(asynchronousResult);

        Console::WriteLine("Please enter the input data to be posted:");
        String^ postData = Console::ReadLine();

        // Convert the string into a byte array.
        array<Byte>^ByteArray = Encoding::UTF8->GetBytes(postData);

        // Write to the request stream.
        postStream->Write(ByteArray, 0, postData->Length);
        postStream->Close();

        // Start the asynchronous operation to get the response
        AsyncCallback^ del = gcnew AsyncCallback(GetResponseCallback);
        request->BeginGetResponse(del, request);
    }

   static void GetResponseCallback(IAsyncResult^ asynchronousResult)
   {
      HttpWebRequest^ request = dynamic_cast<HttpWebRequest^>(asynchronousResult->AsyncState);

      // End the operation
      HttpWebResponse^ response = dynamic_cast<HttpWebResponse^>(request->EndGetResponse(asynchronousResult));
      Stream^ streamResponse = response->GetResponseStream();
      StreamReader^ streamRead = gcnew StreamReader(streamResponse);
      String^ responseString = streamRead->ReadToEnd();
      Console::WriteLine(responseString);
      // Close the stream object
      streamResponse->Close();
      streamRead->Close();

      // Release the HttpWebResponse
      response->Close();
      allDone->Set();
   }
};

void main()
{
   HttpWebRequestBeginGetRequest::Main();
}

using System;
using System.Net;
using System.IO;
using System.Text;
using System.Threading;

class HttpWebRequestBeginGetRequest
{
    private static ManualResetEvent allDone = new ManualResetEvent(false);

    public static void Main(string[] args)
    {


        // Create a new HttpWebRequest object.
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.contoso.com/example.aspx");

        request.ContentType = "application/x-www-form-urlencoded";

        // Set the Method property to 'POST' to post data to the URI.
        request.Method = "POST";

        // start the asynchronous operation
        request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), request);

        // Keep the main thread from continuing while the asynchronous
        // operation completes. A real world application
        // could do something useful such as updating its user interface.
        allDone.WaitOne();
    }

    private static void GetRequestStreamCallback(IAsyncResult asynchronousResult)
    {
        HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

        // End the operation
        Stream postStream = request.EndGetRequestStream(asynchronousResult);

        Console.WriteLine("Please enter the input data to be posted:");
        string postData = Console.ReadLine();

        // Convert the string into a byte array.
        byte[] byteArray = Encoding.UTF8.GetBytes(postData);

        // Write to the request stream.
        postStream.Write(byteArray, 0, postData.Length);
        postStream.Close();

        // Start the asynchronous operation to get the response
        request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
    }

    private static void GetResponseCallback(IAsyncResult asynchronousResult)
    {
        HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

        // End the operation
        HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
        Stream streamResponse = response.GetResponseStream();
        StreamReader streamRead = new StreamReader(streamResponse);
        string responseString = streamRead.ReadToEnd();
        Console.WriteLine(responseString);
        // Close the stream object
        streamResponse.Close();
        streamRead.Close();

        // Release the HttpWebResponse
        response.Close();
        allDone.Set();
    }
}
Imports System.Net
Imports System.IO
Imports System.Text
Imports System.Threading

Class HttpWebRequestBeginGetRequest
    Public Shared allDone As New ManualResetEvent(False)

    Shared Sub Main()


        ' Create a new HttpWebRequest object.
        Dim request As HttpWebRequest = CType(WebRequest.Create("http://www.contoso.com/example.aspx"), _
                 HttpWebRequest)

        ' Set the ContentType property.
        request.ContentType = "application/x-www-form-urlencoded"

        '  Set the Method property to 'POST' to post data to the URI.
        request.Method = "POST"

        ' Start the asynchronous operation.		
        Dim result As IAsyncResult = _
            CType(request.BeginGetRequestStream(AddressOf GetRequestStreamCallback, request), _
            IAsyncResult)

        ' Keep the main thread from continuing while the asynchronous
        ' operation completes. A real world application
        ' could do something useful such as updating its user interface. 
        allDone.WaitOne()
    End Sub

    Private Shared Sub GetRequestStreamCallback(ByVal asynchronousResult As IAsyncResult)
        Dim request As HttpWebRequest = CType(asynchronousResult.AsyncState, HttpWebRequest)
        
        ' End the operation
        Dim postStream As Stream = request.EndGetRequestStream(asynchronousResult)
        Console.WriteLine("Please enter the input data to be posted:")
        Dim postData As [String] = Console.ReadLine()
        
        '  Convert the string into byte array.
        Dim byteArray As Byte() = Encoding.UTF8.GetBytes(postData)

        ' Write to the stream.
        postStream.Write(byteArray, 0, postData.Length)
        postStream.Close()

        ' Start the asynchronous operation to get the response
        Dim result As IAsyncResult = _
            CType(request.BeginGetResponse(AddressOf GetResponseCallback, request), _
            IAsyncResult)
    End Sub

    Private Shared Sub GetResponseCallback(ByVal asynchronousResult As IAsyncResult)
        Dim request As HttpWebRequest = CType(asynchronousResult.AsyncState, HttpWebRequest)
        
        '  Get the response.
        Dim response As HttpWebResponse = CType(request.EndGetResponse(asynchronousResult), _
           HttpWebResponse)
        
        Dim streamResponse As Stream = response.GetResponseStream()
        Dim streamRead As New StreamReader(streamResponse)
        Dim responseString As String = streamRead.ReadToEnd()
        
        Console.WriteLine(responseString)
        
        ' Close Stream object.
        streamResponse.Close()
        streamRead.Close()

        ' Release the HttpWebResponse.
        allDone.Set()
        response.Close()
    End Sub
            
End Class

Comentarios

El EndGetRequestStream método completa una solicitud asincrónica de un flujo Iniciado por el BeginGetRequestStream método.The EndGetRequestStream method completes an asynchronous request for a stream that was started by the BeginGetRequestStream method. Una vez Stream devuelto el objeto, puede enviar datos con HttpWebRequest mediante el Stream.Write método.After the Stream object has been returned, you can send data with the HttpWebRequest by using the Stream.Write method.

Nota

Debe establecer el valor de la ContentLength propiedad antes de escribir los datos en la secuencia.You must set the value of the ContentLength property before writing data to the stream.

Precaución

Debe llamar al Stream.Close método para cerrar la secuencia y liberar la conexión para su reutilización.You must call the Stream.Close method to close the stream and release the connection for reuse. Si no se cierra el flujo, la aplicación se quedará sin conexión.Failure to close the stream causes your application to run out of connections.

Nota

Este miembro genera información de seguimiento cuando se habilita el seguimiento de red en la aplicación.This member outputs trace information when you enable network tracing in your application. Para obtener más información, consulte seguimiento de red en el .NET Framework.For more information, see Network Tracing in the .NET Framework.

Se aplica a