HttpWebRequest.EndGetRequestStream Method

Definition

Termine une requête asynchrone d’un objet Stream à utiliser pour écrire des données.Ends an asynchronous request for a Stream object to use to write data.

Overloads

EndGetRequestStream(IAsyncResult, TransportContext)

Termine une requête asynchrone pour un objet Stream à utiliser pour écrire les données et crée une sortie du TransportContext associé au flux.Ends an asynchronous request for a Stream object to use to write data and outputs the TransportContext associated with the stream.

EndGetRequestStream(IAsyncResult)

Termine une requête asynchrone d’un objet Stream à utiliser pour écrire des données.Ends an asynchronous request for a Stream object to use to write data.

EndGetRequestStream(IAsyncResult, TransportContext)

Termine une requête asynchrone pour un objet Stream à utiliser pour écrire les données et crée une sortie du TransportContext associé au flux.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 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

Parameters

asyncResult
IAsyncResult

Requête d'un flux en attente.The pending request for a stream.

contexttransportContext
TransportContext

TransportContext pour Stream.The TransportContext for the Stream.

Returns

Stream

Stream à utiliser pour écrire les données de la requête.A Stream to use to write request data.

Exceptions

asyncResult n’a pas été retourné par l’instance actuelle à partir d’un appel à BeginGetRequestStream(AsyncCallback, Object).asyncResult was not returned by the current instance from a call to BeginGetRequestStream(AsyncCallback, Object).

asyncResult a la valeur null.asyncResult is null.

Cette méthode a déjà été appelée avec asyncResult.This method was called previously using asyncResult.

La requête ne s’est pas terminée et aucun flux n’est disponible.The request did not complete, and no stream is available.

Abort() a déjà été appelé.Abort() was previously called.

-ou--or- Une erreur s’est produite lors du traitement de la demande.An error occurred while processing the request.

Remarks

La méthode EndGetRequestStream termine une requête asynchrone pour un flux qui a été démarré par la méthode BeginGetRequestStream et génère le TransportContext associé au flux.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. Une fois que l’objet Stream a été retourné, vous pouvez envoyer des données avec le HttpWebRequest à l’aide de la méthode Stream.Write.After the Stream object has been returned, you can send data with the HttpWebRequest by using the Stream.Write method.

Certaines applications qui utilisent l’authentification Windows intégrée avec la protection étendue doivent être en mesure d’interroger la couche de transport utilisée par HttpWebRequest afin de récupérer le jeton de liaison de canal (CBT) à partir du canal TLS sous-jacent.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. La méthode GetRequestStream fournit l’accès à ces informations pour les méthodes HTTP qui ont un corps de demande (requêtesPOST et PUT).The GetRequestStream method provides access to this information for HTTP methods which have a request body (POST and PUT requests). Cela n’est nécessaire que si l’application implémente sa propre authentification et a besoin d’accéder au CBT.This is only needed if the application is implementing its own authentication and needs access to the CBT.

Note

Si une application doit définir la valeur de la propriété ContentLength, cette opération doit être effectuée avant de récupérer le flux et d’y écrire des données.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.

Caution

Vous devez appeler la méthode Stream.Close pour fermer le flux et libérer la connexion en vue de sa réutilisation.You must call the Stream.Close method to close the stream and release the connection for reuse. Si vous ne fermez pas le flux, votre application ne dispose plus de connexions.Failure to close the stream causes your application to run out of connections.

Note

Ce membre génère des informations de traçage lorsque vous activez le traçage réseau dans votre application.This member outputs trace information when you enable network tracing in your application. Pour plus d’informations, consultez la page traçage réseau dans le .NET Framework.For more information, see Network Tracing in the .NET Framework.

See also

EndGetRequestStream(IAsyncResult)

Termine une requête asynchrone d’un objet Stream à utiliser pour écrire des données.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

Parameters

asyncResult
IAsyncResult

Requête d'un flux en attente.The pending request for a stream.

Returns

Stream

Stream à utiliser pour écrire les données de la requête.A Stream to use to write request data.

Exceptions

asyncResult a la valeur null.asyncResult is null.

La requête ne s’est pas terminée et aucun flux n’est disponible.The request did not complete, and no stream is available.

asyncResult n’a pas été retourné par l’instance actuelle à partir d’un appel à BeginGetRequestStream(AsyncCallback, Object).asyncResult was not returned by the current instance from a call to BeginGetRequestStream(AsyncCallback, Object).

Cette méthode a déjà été appelée avec asyncResult.This method was called previously using asyncResult.

Abort() a déjà été appelé.Abort() was previously called.

-ou--or- Une erreur s’est produite lors du traitement de la demande.An error occurred while processing the request.

Examples

L’exemple de code suivant utilise la méthode EndGetRequestStream pour mettre fin à une demande asynchrone d’une instance de flux.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

Remarks

La méthode EndGetRequestStream termine une requête asynchrone pour un flux qui a été démarré par la méthode BeginGetRequestStream.The EndGetRequestStream method completes an asynchronous request for a stream that was started by the BeginGetRequestStream method. Une fois que l’objet Stream a été retourné, vous pouvez envoyer des données avec le HttpWebRequest à l’aide de la méthode Stream.Write.After the Stream object has been returned, you can send data with the HttpWebRequest by using the Stream.Write method.

Note

Vous devez définir la valeur de la propriété ContentLength avant d’écrire des données dans le flux.You must set the value of the ContentLength property before writing data to the stream.

Caution

Vous devez appeler la méthode Stream.Close pour fermer le flux et libérer la connexion en vue de sa réutilisation.You must call the Stream.Close method to close the stream and release the connection for reuse. Si vous ne fermez pas le flux, votre application ne dispose plus de connexions.Failure to close the stream causes your application to run out of connections.

Note

Ce membre génère des informations de traçage lorsque vous activez le traçage réseau dans votre application.This member outputs trace information when you enable network tracing in your application. Pour plus d’informations, consultez la page traçage réseau dans le .NET Framework.For more information, see Network Tracing in the .NET Framework.

Applies to