HttpWebRequest.EndGetRequestStream 方法

定義

結束用來寫入資料之 Stream 物件的非同步要求。Ends an asynchronous request for a Stream object to use to write data.

多載

EndGetRequestStream(IAsyncResult, TransportContext)

結束 Stream 物件的非同步要求,此物件是用來寫入資料和輸出資料流相關聯的 TransportContextEnds an asynchronous request for a Stream object to use to write data and outputs the TransportContext associated with the stream.

EndGetRequestStream(IAsyncResult)

結束用來寫入資料之 Stream 物件的非同步要求。Ends an asynchronous request for a Stream object to use to write data.

EndGetRequestStream(IAsyncResult, TransportContext)

結束 Stream 物件的非同步要求,此物件是用來寫入資料和輸出資料流相關聯的 TransportContextEnds 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

參數

asyncResult
IAsyncResult

資料流的暫止要求。The pending request for a stream.

contexttransportContext
TransportContext

TransportContextStreamThe TransportContext for the Stream.

傳回

Stream

用以寫入要求資料的 StreamA Stream to use to write request data.

例外狀況

呼叫 BeginGetRequestStream(AsyncCallback, Object) 時,目前的執行個體未傳回 asyncResultasyncResult was not returned by the current instance from a call to BeginGetRequestStream(AsyncCallback, Object).

asyncResultnullasyncResult is null.

這個方法先前已使用 asyncResult 呼叫過。This method was called previously using asyncResult.

要求未完成,而且沒有可用的資料流。The request did not complete, and no stream is available.

之前已呼叫過 Abort()Abort() was previously called.

-或--or- 處理這個要求時發生錯誤。An error occurred while processing the request.

備註

EndGetRequestStream方法會針對由方法啟動的資料流程完成非同步要求 BeginGetRequestStream ,並輸出 TransportContext 與資料流程相關聯的。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. Stream傳回物件之後,您可以使用方法,透過來傳送資料 HttpWebRequest Stream.WriteAfter the Stream object has been returned, you can send data with the HttpWebRequest by using the Stream.Write method.

某些使用整合式 Windows 驗證搭配擴充保護的應用程式,可能需要能夠查詢所使用的傳輸層,才能 HttpWebRequest 從基礎 TLS 通道 (CBT) 抓取通道系結 token。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. 方法可讓 GetRequestStream 具有要求本文 (POST 和要求) 的 HTTP 方法存取此資訊 PUTThe GetRequestStream method provides access to this information for HTTP methods which have a request body (POST and PUT requests). 只有當應用程式正在執行自己的驗證,而且需要存取 CBT 時,才需要進行此工作。This is only needed if the application is implementing its own authentication and needs access to the CBT.

注意

如果應用程式需要設定屬性的值 ContentLength ,則必須先完成這項作業,才能抓取資料流程並將資料寫入其中。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.

警告

您必須呼叫 Stream.Close 方法來關閉資料流程,並釋放連接以供重複使用。You must call the Stream.Close method to close the stream and release the connection for reuse. 無法關閉資料流程,會導致您的應用程式用盡連接。Failure to close the stream causes your application to run out of connections.

注意

在應用程式中啟用網路追蹤時,這個成員會輸出追蹤資訊。This member outputs trace information when you enable network tracing in your application. 如需詳細資訊,請參閱 .NET Framework 中的網路追蹤For more information, see Network Tracing in the .NET Framework.

另請參閱

適用於

EndGetRequestStream(IAsyncResult)

結束用來寫入資料之 Stream 物件的非同步要求。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

參數

asyncResult
IAsyncResult

資料流的暫止要求。The pending request for a stream.

傳回

Stream

用以寫入要求資料的 StreamA Stream to use to write request data.

例外狀況

asyncResultnullasyncResult is null.

要求未完成,而且沒有可用的資料流。The request did not complete, and no stream is available.

呼叫 BeginGetRequestStream(AsyncCallback, Object) 時,目前的執行個體未傳回 asyncResultasyncResult was not returned by the current instance from a call to BeginGetRequestStream(AsyncCallback, Object).

這個方法先前已使用 asyncResult 呼叫過。This method was called previously using asyncResult.

之前已呼叫過 Abort()Abort() was previously called.

-或--or- 處理這個要求時發生錯誤。An error occurred while processing the request.

範例

下列程式碼範例會使用 EndGetRequestStream 方法來結束資料流程實例的非同步要求。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

備註

EndGetRequestStream方法會針對由方法啟動的資料流程完成非同步要求 BeginGetRequestStreamThe EndGetRequestStream method completes an asynchronous request for a stream that was started by the BeginGetRequestStream method. Stream傳回物件之後,您可以使用方法,透過來傳送資料 HttpWebRequest Stream.WriteAfter the Stream object has been returned, you can send data with the HttpWebRequest by using the Stream.Write method.

注意

ContentLength 資料寫入資料流程之前,您必須先設定屬性的值。You must set the value of the ContentLength property before writing data to the stream.

警告

您必須呼叫 Stream.Close 方法來關閉資料流程,並釋放連接以供重複使用。You must call the Stream.Close method to close the stream and release the connection for reuse. 無法關閉資料流程,會導致您的應用程式用盡連接。Failure to close the stream causes your application to run out of connections.

注意

在應用程式中啟用網路追蹤時,這個成員會輸出追蹤資訊。This member outputs trace information when you enable network tracing in your application. 如需詳細資訊,請參閱 .NET Framework 中的網路追蹤For more information, see Network Tracing in the .NET Framework.

適用於