HttpWebRequest.EndGetRequestStream メソッド

.NET Framework クラス ライブラリ リファレンス

HttpWebRequest.EndGetRequestStream メソッド

データを書き込むために使用する Stream オブジェクトの非同期要求を終了します。

名前空間: System.Net
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

Public Overrides Function
 EndGetRequestStream ( _
    asyncResult As IAsyncResult _
) As Stream

Visual Basic (使用法)

Dim instance As HttpWebRequest
Dim asyncResult As IAsyncResult
Dim returnValue As Stream

returnValue = instance.EndGetRequestStream(asyncResult)

C#

public override Stream EndGetRequestStream (
    IAsyncResult asyncResult
)

C++

public:
virtual Stream^ EndGetRequestStream (
    IAsyncResult^ asyncResult
) override

J#

public Stream EndGetRequestStream (
    IAsyncResult asyncResult
)

JScript

public override function EndGetRequestStream
 (
    asyncResult : IAsyncResult
) : Stream

パラメータ

asyncResult

ストリームの保留中の要求。

戻り値
要求データを書き込むために使用する Stream。

例外

例外の種類	条件
ArgumentNullException	asyncResult が null 参照 (Visual Basic では Nothing) です。
IOException	要求が完了しませんでした。また、ストリームは使用できません。
ArgumentException	現在のインスタンスによって、BeginGetRequestStream への呼び出しから asyncResult が返されませんでした。
InvalidOperationException	このメソッドは、asyncResult を使用して既に呼び出されています。
WebException	Abort は既に呼び出されました。 または 要求の処理中にエラーが発生しました。

解説

EndGetRequestStream メソッドは、BeginGetRequestStream メソッドが開始したストリームの非同期要求を完了します。Stream オブジェクトが返されると、Stream.Write メソッドを使用して、HttpWebRequest でデータを送信できます。

メモ
ストリームにデータを書き込む前に、ContentLength プロパティの値を設定する必要があります。

メモ
このメンバは、アプリケーションでネットワーク トレースが有効にされている場合にトレース情報を出力します。詳細については、「ネットワークのトレース」を参照してください。

使用例

EndGetRequestStream メソッドを使用して、ストリーム インスタンスに対する非同期要求を終了するコード例を次に示します。

Visual Basic

Imports System
Imports System.Net
Imports System.IO
Imports System.Text
Imports System.Threading
Imports Microsoft.VisualBasic

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)
Dim request As HttpWebRequest = CType(WebRequest.Create("http://localhost/test/PostAccepter.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 ReadCallback,
 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()
        '  Get the response.
        Dim response As HttpWebResponse = CType(request.GetResponse(),
 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.
        response.Close()
            
    End Sub ' Main

    Private Shared Sub ReadCallback(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()
        allDone.Set()
    End Sub ' ReadCallback

End Class ' HttpWebRequest_BeginGetRequest

C#

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

class HttpWebRequestBeginGetRequest
{
    public static ManualResetEvent allDone
 = new ManualResetEvent(false);
    public static void Main()
    {
        

            // Create a new HttpWebRequest object.
            HttpWebRequest request=(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.    
            request.BeginGetRequestStream(new AsyncCallback(ReadCallback),
 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();

            // Get the response.
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            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();
        }
    
    private static void
 ReadCallback(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 ();
            allDone.Set();    
    }

}

C++

#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( ReadCallback );
      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();
      HttpWebResponse^ response = dynamic_cast<HttpWebResponse^>(request->GetResponse());
      Stream^ streamResponse = response->GetResponseStream();
      StreamReader^ streamRead = gcnew StreamReader( streamResponse );
      String^ responseString = streamRead->ReadToEnd();
      Console::WriteLine( responseString );
      
      // Close Stream object.
      streamResponse->Close();
      streamRead->Close();
      
      // Release the HttpWebResponse.
      response->Close();
   }


private:
   static void ReadCallback( 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 Byte array.
      array<Byte>^ByteArray = Encoding::UTF8->GetBytes( postData );
      
      // Write to the request stream.
      postStream->Write( ByteArray, 0, postData->Length );
      postStream->Close();
      allDone->Set();
   }

};

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

J#

import System.*;
import System.Net.*;
import System.IO.*;
import System.Text.*;
import System.Threading.*;

class HttpWebRequestBeginGetRequest
{
    public 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"));
        // Set the ContentType property. 
        request.set_ContentType("application/x-www-form-urlencoded");
        // Set the Method property to 'POST' to post data to the URI.
        request.set_Method("POST");
        // Start the asynchronous operation.    
        request.BeginGetRequestStream(new AsyncCallback(ReadCallback),
 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();

        // Get the response.
        HttpWebResponse response = (HttpWebResponse)(request.GetResponse());
        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();
    } //main

    private static void
 ReadCallback(IAsyncResult asynchronousResult)
    {
        HttpWebRequest request = (HttpWebRequest)
            (asynchronousResult.get_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.
        ubyte byteArray[] = Encoding.get_UTF8().GetBytes(postData);
        // Write to the request stream.
        postStream.Write(byteArray, 0, postData.get_Length());
        postStream.Close();
        allDone.Set();
    } //ReadCallback
} //HttpWebRequestBeginGetRequest 

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
HttpWebRequest クラス
HttpWebRequest メンバ
System.Net 名前空間