FileWebRequest.EndGetResponse メソッド

[アーティクル]
03/28/2008

ファイルシステムリソースへの非同期要求を終了します。

Overrides Public Function EndGetResponse( _
   ByVal asyncResult As IAsyncResult _) As WebResponse
[C#]
public override WebResponse EndGetResponse(IAsyncResultasyncResult);
[C++]
public: WebResponse* EndGetResponse(IAsyncResult* asyncResult);
[JScript]
public override function EndGetResponse(
   asyncResult : IAsyncResult) : WebResponse;

パラメータ

asyncResult
応答の保留中の要求を参照する IAsyncResult 。

戻り値

ファイルシステムリソースからの応答を格納する WebResponse 。

例外

例外の種類	条件
ArgumentNullException	asyncResult が null 参照 (Visual Basic では Nothing) です。

解説

EndGetResponse メソッドは、 BeginGetResponse メソッドで開始したファイルシステムリソースの非同期要求を完了します。

使用例

[Visual Basic, C#, C++] EndGetResponse メソッドを使用して、ファイルシステムリソースに対する非同期要求を終了する例を次に示します。

 
Public Class RequestDeclare
    Public myFileWebRequest As FileWebRequest
     
    Public Sub New()
        myFileWebRequest = Nothing
    End Sub ' New
End Class ' RequestDeclare



Class FileWebRequest_resbeginend
    
    Public Shared allDone As New ManualResetEvent(False)
    
    ' Entry point which delegates to C-style main Private Function.
    Public Overloads Shared Sub Main()
        Main(GetCommandLineArgs())
    End Sub
    
    Overloads Shared Sub Main(args() As String)
        
        If args.Length < 2 Then
            Console.WriteLine(ControlChars.Cr + "Please enter the file name as command line parameter:")
            Console.WriteLine("Usage:FileWebRequest_resbeginend " + ChrW(60) + "systemname" + ChrW(62) + "/" + ChrW(60) + "sharedfoldername" + ChrW(62) + "/" + ChrW(60) + "filename" + ChrW(62) + ControlChars.Cr + "Example:FileWebRequest_resbeginend shafeeque/shaf/hello.txt")
        
        Else
            Try

                ' Place a webrequest.
                Dim myWebRequest As WebRequest = WebRequest.Create(("file://" + args(1)))
                ' Create an instance of the 'RequestDeclare' and associating the 'myWebRequest' to it.        
                Dim myRequestDeclare As New RequestDeclare()
                myRequestDeclare.myFileWebRequest = CType(myWebRequest, FileWebRequest)
                
                ' Begin the Asynchronous request for getting file content using 'BeginGetResponse()' method.    
                 Dim asyncResult As IAsyncResult = CType(myRequestDeclare.myFileWebRequest.BeginGetResponse(AddressOf RespCallback, myRequestDeclare), IAsyncResult)
                 allDone.WaitOne()

            
            Catch e As ArgumentNullException
                Console.WriteLine(("ArgumentNullException is :" + e.Message))
            Catch e As UriFormatException
                Console.WriteLine(("UriFormatException is :" + e.Message))
            End Try
        End If
    End Sub ' Main
    
    
    Private Shared Sub RespCallback(ar As IAsyncResult)



        ' State of request is asynchronous.
        Dim requestDeclare As RequestDeclare = CType(ar.AsyncState, RequestDeclare)
        
        Dim myFileWebRequest As FileWebRequest = requestDeclare.myFileWebRequest
        
        ' End the Asynchronus request by calling the 'EndGetResponse()' method.
        Dim myFileWebResponse As FileWebResponse = CType(myFileWebRequest.EndGetResponse(ar), FileWebResponse)
        
        ' Reade the response into Stream.
        Dim streamReader As New StreamReader(myFileWebResponse.GetResponseStream())

       
        Dim readBuffer(256) As [Char]
        
        Dim count As Integer = streamReader.Read(readBuffer, 0, 256)
        
        Console.WriteLine("The contents of the file are :"+ControlChars.Cr)
        
        While count > 0
            Dim str As New [String](readBuffer, 0, count)
            Console.WriteLine(str)
            count = streamReader.Read(readBuffer, 0, 256)
        End While
         streamReader.Close()
        ' Release the response object resources.
         myFileWebResponse.Close()
        allDone.Set()
        Console.WriteLine("File reading is over.")
    End Sub ' RespCallback 
End Class ' FileWebRequest_resbeginend


[C#] 

    public class RequestDeclare
    {
       public FileWebRequest myFileWebRequest;    
       
         public RequestDeclare()
        {
            myFileWebRequest = null;
        }
    }
    
    
    class FileWebRequest_resbeginend
    {

        public static ManualResetEvent allDone = new ManualResetEvent(false);

        static void Main(string[] args)
        {
            
            if (args.Length < 1)
            {
               Console.WriteLine("\nPlease enter the file name as command line parameter:");
                Console.WriteLine("Usage:FileWebRequest_resbeginend <systemname>/<sharedfoldername>/<filename>\nExample:FileWebRequest_resbeginend shafeeque/shaf/hello.txt");
            }  
            else
            {
              try
            {


                  // Place a 'Webrequest'.
                  WebRequest myWebRequest= WebRequest.Create("file://"+args[0]);
                  // Create an instance of the 'RequestDeclare' and associating the 'myWebRequest' to it.        
                  RequestDeclare myRequestDeclare = new RequestDeclare();
                  myRequestDeclare.myFileWebRequest = (FileWebRequest)myWebRequest;
              

                  // Begin the Asynchronous request for getting file content using 'BeginGetResponse()' method.    
                  IAsyncResult asyncResult =(IAsyncResult) myRequestDeclare.myFileWebRequest.BeginGetResponse(new AsyncCallback(RespCallback),myRequestDeclare);            
                  allDone.WaitOne();

            
               }
            catch(ArgumentNullException e)
               {
                  Console.WriteLine("ArgumentNullException is :"+e.Message);
               }
               catch(UriFormatException e)
              {
                  Console.WriteLine("UriFormatException is :"+e.Message);
              }
           }
        }

      private static void RespCallback(IAsyncResult ar)
      {    


               // State of request is asynchronous.
                RequestDeclare requestDeclare=(RequestDeclare) ar.AsyncState;
                    
                FileWebRequest  myFileWebRequest=requestDeclare.myFileWebRequest;
            
               // End the Asynchronus request by calling the 'EndGetResponse()' method.
                
                FileWebResponse myFileWebResponse = (FileWebResponse) myFileWebRequest.EndGetResponse(ar);


                // Reade the response into Stream.
                StreamReader streamReader= new StreamReader(myFileWebResponse.GetResponseStream());


                Char[] readBuffer = new Char[256];
                    
                int count = streamReader.Read( readBuffer, 0, 256 );

                Console.WriteLine("The contents of the file are :\n");
        
                while (count > 0) 
                {
                    String str = new String(readBuffer, 0, count);
                    Console.WriteLine(str);
                    count = streamReader.Read(readBuffer, 0, 256);
                }
                
                streamReader.Close();
                // Release the response object resources.
                myFileWebResponse.Close();
                allDone.Set();
                Console.WriteLine("File reading is over.");    
        }

    }

[C++] 
public __gc class RequestDeclare {
public:
   FileWebRequest*  myFileWebRequest;

   RequestDeclare() {
      myFileWebRequest = 0;
   }
};

__gc class FileWebRequest_resbeginend {
public:
   static ManualResetEvent* allDone = new ManualResetEvent(false);

   static void RespCallback(IAsyncResult* ar) {
      // State of request is asynchronous.
      RequestDeclare* requestDeclare = dynamic_cast<RequestDeclare*>(ar->AsyncState);

      FileWebRequest*  myFileWebRequest=requestDeclare->myFileWebRequest;

      // End the Asynchronus request by calling the 'EndGetResponse()' method.
      FileWebResponse* myFileWebResponse = dynamic_cast<FileWebResponse*> (myFileWebRequest->EndGetResponse(ar));

      // Reade the response into Stream.
      StreamReader* streamReader = new StreamReader(myFileWebResponse->GetResponseStream());

      Char readBuffer[] = new Char[256];
      int count = streamReader->Read(readBuffer, 0, 256);
      Console::WriteLine(S"The contents of the file are :\n");

      while (count > 0) {
         String* str = new String(readBuffer, 0, count);
         Console::WriteLine(str);
         count = streamReader->Read(readBuffer, 0, 256);
      }

      streamReader->Close();
      // Release the response Object* resources.
      myFileWebResponse->Close();
      allDone->Set();
      Console::WriteLine(S"File reading is over.");
   }
};

int main() {
   String* args[] = Environment::GetCommandLineArgs();
   if (args->Length < 2) {
      Console::WriteLine(S"\nPlease enter the file name as command line parameter:");
      Console::WriteLine(S"Usage:FileWebRequest_resbeginend <systemname>/<sharedfoldername>/<filename>\n");
      Console::WriteLine(S"Example:FileWebRequest_resbeginend shafeeque/shaf/hello.txt");
   } else {
      try {
         // Place a 'Webrequest'.
         WebRequest* myWebRequest= WebRequest::Create(String::Concat(S"file://", args[1]));
         // Create an instance of the 'RequestDeclare' and associating the 'myWebRequest' to it.
         RequestDeclare* myRequestDeclare = new RequestDeclare();
         myRequestDeclare->myFileWebRequest = dynamic_cast<FileWebRequest*>(myWebRequest);

         // Begin the Asynchronous request for getting file content using 'BeginGetResponse()' method.
         IAsyncResult* asyncResult = dynamic_cast<IAsyncResult*>
            (myRequestDeclare->myFileWebRequest->BeginGetResponse(new AsyncCallback(0, 
            &FileWebRequest_resbeginend::RespCallback), myRequestDeclare));
         FileWebRequest_resbeginend::allDone->WaitOne();
      } catch (ArgumentNullException* e) {
         Console::WriteLine(S"ArgumentNullException is : {0}", e->Message);
      } catch (UriFormatException* e) {
         Console::WriteLine(S"UriFormatException is : {0}", e->Message);
      }
   }
}

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必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ

参照

次の方法で共有

FileWebRequest.EndGetResponse メソッド

パラメータ

戻り値

例外

解説

使用例

必要条件

参照

その他のリソース