FileWebRequest.GetResponse メソッド

.NET Framework クラス ライブラリ リファレンス

FileWebRequest.GetResponse メソッド

ファイル システム要求への応答を返します。

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

Visual Basic (宣言)

Public Overrides Function
 GetResponse As WebResponse

Visual Basic (使用法)

Dim instance As FileWebRequest
Dim returnValue As WebResponse

returnValue = instance.GetResponse

C#

public override WebResponse GetResponse ()

C++

public:
virtual WebResponse^ GetResponse () override

J#

public WebResponse GetResponse ()

JScript

public override function GetResponse () : WebResponse

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
WebException	要求がタイムアウトしました。

解説

GetResponse メソッドは、ファイル システム リソースからの応答を格納した WebResponse オブジェクトを返します。

GetResponse メソッドは、WebResponse への同期アクセスを提供します。非同期アクセスでは、BeginGetResponse メソッドと EndGetResponse メソッドを使用します。

使用例

GetResponse メソッドを使用して、ファイル システム要求への応答を返すコード例を次に示します。

Visual Basic

'
' This example shows how to use the FileWebRequest.GetResponse method
 
' to read and display the contents of a file passed by the user.
' Note.  For this program to work, the folder containing the test file
' must be shared, with its permissions set to allow read access. 


Imports System
Imports System.Net
Imports System.IO


Namespace Mssc.PluggableProtocols.File

  Module M_TestGetResponse

    Class TestGetResponse
      Private Shared myFileWebResponse As
 FileWebResponse


      Private Shared Sub
 showUsage()
        Console.WriteLine(ControlChars.Lf + "Please enter file
 name:")
        Console.WriteLine("Usage: cs_getresponse <systemname>/<sharedfoldername>/<filename>")
      End Sub 'showUsage


      Private Shared Function
 makeFileRequest(ByVal fileName As String)
 As Boolean
        Dim requestOk As Boolean
 = False
        Try
          Dim myUrl As New
 Uri("file://" + fileName)

          ' Create a FileWebRequest object using the passed URI. 
          Dim myFileWebRequest As FileWebRequest
 = CType(WebRequest.Create(myUrl), FileWebRequest)

          ' Get the FileWebResponse object.
          myFileWebResponse = CType(myFileWebRequest.GetResponse(), FileWebResponse)

          requestOk = True
        Catch e As WebException
          Console.WriteLine(("WebException: " + e.Message))
        Catch e As UriFormatException
          Console.WriteLine(("UriFormatWebException: "
 + e.Message))
        End Try

        Return requestOk
      End Function 'makeFileRequest


      Private Shared Sub
 readFile()
        Try
          ' Create the file stream. 
          Dim receiveStream As Stream = myFileWebResponse.GetResponseStream()

          ' Create a reader object to read the file content.
          Dim readStream As New
 StreamReader(receiveStream)

          ' Create a local buffer for a temporary storage of the 
          ' read data.
          Dim readBuffer() As Char
 = New [Char](255) {}

          ' Read the first 256 bytes.
          Dim count As Integer
 = readStream.Read(readBuffer, 0, 256)

          Console.WriteLine("The file content is:")
          Console.WriteLine("")

          'Loop to read the remaining data in blocks of 256 bytes
          'and display the data on the console.
          While count > 0
            Dim str As New
 [String](readBuffer, 0, count)
            Console.WriteLine((str + ControlChars.Lf))
            count = readStream.Read(readBuffer, 0, 256)
          End While

          readStream.Close()

          ' Release the response object resources.
          myFileWebResponse.Close()

        Catch e As WebException
          Console.WriteLine(("The WebException: "
 + e.Message))
        Catch e As UriFormatException
          Console.WriteLine(("The UriFormatException: "
 + e.Message))
        End Try
      End Sub 'readFile

      'Entry point which delegates to C-style main Private Function
      Public Shared Sub
 Main(ByVal args() As String)

        If args.Length < 1 Then
          showUsage()
        Else
          If makeFileRequest(args(0)) = True
 Then
            readFile()
          End If
        End If
      End Sub 'Main
    End Class 'TestGetResponse

  End Module

End Namespace

C#

//
// This example shows how to use the FileWebRequest.GetResponse method
 
// to read and display the contents of a file passed by the user.
// Note.  For this program to work, the folder containing the test file
// must be shared, with its permissions set to allow read access. 

using System;
using System.Net;
using System.IO;

namespace Mssc.PluggableProtocols.File
{
  
  class TestGetResponse
  {
    private static FileWebResponse myFileWebResponse;

    private static void
 showUsage()
    {
      Console.WriteLine("\nPlease enter file name:");
      Console.WriteLine("Usage: cs_getresponse <systemname>/<sharedfoldername>/<filename>");
    }

    private static bool
 makeFileRequest(string fileName)
    {
      bool requestOk = false;
      try
      {
        Uri myUrl = new Uri("file://" +
 fileName);
    
        // Create a FileWebRequest object using the passed URI. 
        FileWebRequest myFileWebRequest = (FileWebRequest)WebRequest.Create(myUrl);

        // Get the FileWebResponse object.
        myFileWebResponse =(FileWebResponse)myFileWebRequest.GetResponse();
        
        requestOk = true;
      }
      catch(WebException e)
      {
        Console.WriteLine("WebException: "+e.Message);
      }
      catch(UriFormatException e)
      {
        Console.WriteLine("UriFormatWebException: "+e.Message);
      }
      
      return requestOk;

    }
    
    private static void
 readFile()
    {
      try
      {
        // Create the file stream. 
        Stream receiveStream=myFileWebResponse.GetResponseStream();
        
        // Create a reader object to read the file content.
        StreamReader readStream = new StreamReader( receiveStream
 );
        
        // Create a local buffer for a temporary storage of the 
        // read data.
        char[] readBuffer = new Char[256];
        
        // Read the first 256 bytes.
        int count = readStream.Read( readBuffer, 0, 256 );

        Console.WriteLine("The file content is:");
        Console.WriteLine("");
     
        // Loop to read the remaining data in blocks of 256 bytes
        // and display the data on the console.
        while (count > 0) 
        {
          String str = new String(readBuffer, 0, count);
          Console.WriteLine(str+"\n");
          count = readStream.Read(readBuffer, 0, 256);
        }
 
        readStream.Close();
        
        // Release the response object resources.
        myFileWebResponse.Close();
      
      }
      catch(WebException e)
      {
        Console.WriteLine("The WebException: "+e.Message);
      }
      catch(UriFormatException e)
      {
        Console.WriteLine("The UriFormatException: "+e.Message);
      }
      
    }

    static void Main(string[]
 args)
    {

      if (args.Length < 1)
        showUsage();
      else
      {
        if (makeFileRequest(args[0])== true)
          readFile();
      }   
    }
  }
}

C++

//
// This program shows how to use the FileWebRequest::GetResponse method
 
// to read and display the content of a file passed by the user.
// Note. In order for this program to work, the folder containing the
 test file
// must be shared with its permissions set to allow read access. 
#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::IO;
ref class TestGetResponse
{
private:
   static FileWebResponse^ myFileWebResponse;
   static void showUsage()
   {
      Console::WriteLine( "\nPlease enter file name:" );
      Console::WriteLine( "Usage: cs_getresponse <systemname>/<sharedfoldername>/<filename>"
 );
      Console::WriteLine( "Example: cs_getresponse ndpue/temp/hello.txt"
 );
   }

   static bool makeFileRequest( String^ fileName
 )
   {
      bool requestOk = false;
      try
      {
         Uri^ myUrl = gcnew Uri( String::Format( "file://{0}",
 fileName ) );
         
         // Create a Filewebrequest object using the passed Uri. 
         FileWebRequest^ myFileWebRequest = dynamic_cast<FileWebRequest^>(WebRequest::Create(
 myUrl ));
         
         // Get the FileWebResponse object.
         myFileWebResponse = dynamic_cast<FileWebResponse^>(myFileWebRequest->GetResponse());
         requestOk = true;
      }
      catch ( WebException^ e ) 
      {
         Console::WriteLine( "WebException: {0}", e->Message );
      }
      catch ( UriFormatException^ e ) 
      {
         Console::WriteLine( "UriFormatWebException: {0}", e->Message
 );
      }

      return requestOk;
   }

   static void readFile()
   {
      try
      {
         
         // Create the file stream. 
         Stream^ receiveStream = myFileWebResponse->GetResponseStream();
         
         // Create a reader object to read the file content.
         StreamReader^ readStream = gcnew StreamReader( receiveStream );
         
         // Create a local buffer for a temporary storage of the 
         // read data.
         array<Char>^readBuffer = gcnew array<Char>(256);
         
         // Read the first up to 256 bytes.
         int count = readStream->Read( readBuffer, 0, 256 );
         Console::WriteLine( "The file content is:" );
         Console::WriteLine( "" );
         
         // Loop to read the remaining bytes in 256 blocks
         // and display the data on the console.
         while ( count > 0 )
         {
            String^ str = gcnew String( readBuffer,0,count );
            Console::WriteLine(  "{0}\n", str );
            count = readStream->Read( readBuffer, 0, 256 );
         }
         readStream->Close();
         
         // Release the response object resources.
         myFileWebResponse->Close();
      }
      catch ( WebException^ e ) 
      {
         Console::WriteLine( "The WebException: {0}", e->Message );
      }
      catch ( UriFormatException^ e ) 
      {
         Console::WriteLine( "The UriFormatException: {0}", e->Message
 );
      }

   }


public:
   static void Main()
   {
      array<String^>^args = Environment::GetCommandLineArgs();
      if ( args->Length < 2 )
            showUsage();
      else
      {
         if ( makeFileRequest( args[ 1 ] ) )
                  readFile();
      }
   }

};

int main()
{
   TestGetResponse::Main();
}

J#

//
// This example shows how to use the FileWebRequest.GetResponse method
 
// to read and display the contents of a file passed by the user.
// Note.  For this program to work, the folder containing the test file
// must be shared, with its permissions set to allow read access. 
import System.*;
import System.Net.*;
import System.IO.*;

class TestGetResponse
{
    private static FileWebResponse myFileWebResponse;

    private static void
 ShowUsage()
    {
        Console.WriteLine("\nPlease enter file name:");
        Console.WriteLine("Usage: jsl_getresponse <systemname>/"
 
            + "<sharedfoldername>/<filename>");
    }//ShowUsage


    private static boolean MakeFileRequest(String
 fileName)
    {
        boolean requestOk = false;
        try {
            Uri myUrl = new Uri("file://" +
 fileName);

            // Create a FileWebRequest object using the passed URI.
 
            FileWebRequest myFileWebRequest = 
                ((FileWebRequest)(WebRequest.Create(myUrl)));

            // Get the FileWebResponse object.
            myFileWebResponse = 
                ((FileWebResponse)(myFileWebRequest.GetResponse()));
            requestOk = true;
        }
        catch (WebException e) {
            Console.WriteLine(("WebException: " + e.get_Message()));
        }
        catch (UriFormatException e) {
            Console.WriteLine(("UriFormatWebException: " + e.get_Message()));
        }
        return requestOk;
    } //MakeFileRequest

    private static void
 ReadFile()
    {
        try {
            // Create the file stream. 
            Stream receiveStream = myFileWebResponse.GetResponseStream();

            // Create a reader object to read the file content.
            StreamReader readStream = new StreamReader(receiveStream);

            // Create a local buffer for a temporary storage of the
 
            // read data.
            char readBuffer[] = new char[256];

            // Read the first 256 bytes.
            int count = readStream.Read(readBuffer, 0, 256);
            Console.WriteLine("The file content is:");
            Console.WriteLine("");

            // Loop to read the remaining data in blocks of 256 bytes
            // and display the data on the console.
            while ((count > 0)) {
                String str = new String(readBuffer, 0, count);
                Console.WriteLine((str + "\n"));
                count = readStream.Read(readBuffer, 0, 256);
            }
            readStream.Close();
            // Release the response object resources.
            myFileWebResponse.Close();
        }
        catch (WebException e) {
            Console.WriteLine(("The WebException: " + e.get_Message()));
        }
        catch (UriFormatException e) {
            Console.WriteLine(("The UriFormatException: " + e.get_Message()));
        }
    } //ReadFile

    public static void main(String[]
 args)
    {
        if (args.length < 1) {
            ShowUsage();
        }
        else {
            if (MakeFileRequest(args[0]) == true)
 {
                ReadFile();
            }
        }
    } //main
} //TestGetResponse

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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

参照

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