FileWebResponse.Headers プロパティ

.NET Framework クラス ライブラリ リファレンス

FileWebResponse.Headers プロパティ

応答に関連付けられているヘッダーの名前/値ペアのコレクションを取得します。

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

Visual Basic (宣言)

Public Overrides ReadOnly
 Property Headers As WebHeaderCollection

Visual Basic (使用法)

Dim instance As FileWebResponse
Dim value As WebHeaderCollection

value = instance.Headers

C#

public override WebHeaderCollection Headers { get;
 }

C++

public:
virtual property WebHeaderCollection^ Headers {
    WebHeaderCollection^ get () override;
}

J#

/** @property */
public WebHeaderCollection get_Headers ()

JScript

public override function get
 Headers () : WebHeaderCollection

プロパティ値
応答に関連付けられているヘッダーの名前/値ペアを格納する WebHeaderCollection。

解説

Headers プロパティは、コンテンツ長とコンテンツ タイプの 2 つの名前/値ペアを格納します。どちらも、プロパティ ContentLength および ContentType としても公開されています。

使用例

Headers プロパティを使用して、応答に関連付けられている名前と値の組み合わせを取得する例を次に示します。

Visual Basic

Public Shared Sub GetPage(url
 As [String])
    Try
        Dim fileUrl As New
 Uri("file://" + url)
        ' Create a 'FileWebrequest' object with the specified Uri. 
        Dim myFileWebRequest As FileWebRequest
 = CType(WebRequest.Create(fileUrl), FileWebRequest)
        ' Send the 'fileWebRequest' and wait for response.
        Dim myFileWebResponse As FileWebResponse
 = CType(myFileWebRequest.GetResponse(), FileWebResponse)
        
        ' Display all Headers present in the response received from
 the Uri.
        Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "The
 following headers were received in the response: ")
        ' Headers property is a WebHeaderCollection. Using it's properties
 to traverse the collection and display each header.
        Dim i As Integer
        
        While i < myFileWebResponse.Headers.Count
            Console.WriteLine(ControlChars.Cr + "Header Name:{0},
 Header value :{1}", myFileWebResponse.Headers.Keys(i), myFileWebResponse.Headers(i))
            i = i + 1
        End While
        myFileWebResponse.Close()
    
    Catch e As WebException
        Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "The
 Reason for failure is : {0}", e.Status)
    Catch e As Exception
        Console.WriteLine(ControlChars.Cr + "The following exception
 was raised : {0}", e.Message)
    End Try

C#

public static void GetPage(String
 url) 
 {
     try 
      {     
            Uri fileUrl = new Uri("file://"+url);
            // Create a 'FileWebrequest' object with the specified Uri
 .
            FileWebRequest myFileWebRequest = (FileWebRequest)WebRequest.Create(fileUrl);
 
            // Send the 'fileWebRequest' and wait for response.
            FileWebResponse myFileWebResponse = (FileWebResponse)myFileWebRequest.GetResponse();
 
            // Display all Headers present in the response received
 from the Uri.
            Console.WriteLine("\r\nThe following headers were received in
 the response:");
            // Display each header and the key of the response object.
            for(int i=0; i < myFileWebResponse.Headers.Count;
 ++i)  
                Console.WriteLine("\nHeader Name:{0}, Header value :{1}"
,myFileWebResponse.Headers.Keys[i],
                                myFileWebResponse.Headers[i]); 
            myFileWebResponse.Close(); 
         } 
     catch(WebException e) 
         {
             Console.WriteLine("\r\nWebException thrown.The Reason for
 failure is : {0}",e.Status); 
         }
     catch(Exception e)
         {
             Console.WriteLine("\nThe following Exception was raised : {0}"
,e.Message);
         }
}

C++

void GetPage( String^ url )
{
   try
   {
      Uri^ fileUrl = gcnew Uri( String::Concat( "file://",
 url ) );
      // Create a 'FileWebrequest' Object^ with the specified Uri .
      FileWebRequest^ myFileWebRequest = (FileWebRequest^)(WebRequest::Create( fileUrl
 ));
      // Send the 'FileWebRequest' and wait for response.
      FileWebResponse^ myFileWebResponse = (FileWebResponse^)(myFileWebRequest->GetResponse());
      // Display all Headers present in the response received from the
 Uri.
      Console::WriteLine( "\r\nThe following headers were received in
 the response:" );
      // Display each header and the key of the response Object^.
      for ( int i = 0; i < myFileWebResponse->Headers->Count;
 ++i )
         Console::WriteLine( "\nHeader Name: {0}, Header value : {1}",
            myFileWebResponse->Headers->Keys[ i ], myFileWebResponse->Headers[
 (HttpRequestHeader)i ] );
      myFileWebResponse->Close();
   }
   catch ( WebException^ e ) 
   {
      Console::WriteLine( "\r\nWebException thrown. The Reason for
 failure is: {0}", e->Status );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "\nThe following Exception was raised: {0}",
 e->Message );
   }

}

J#

public static void GetPage(String
 url)
{
    try {
        Uri fileUrl = new Uri("file://"
 + url);

        // Create a 'FileWebrequest' object with the specified Uri .
        FileWebRequest myFileWebRequest = (FileWebRequest)(
            WebRequest.Create(fileUrl));

        // Send the 'fileWebRequest' and wait for response.
        FileWebResponse myFileWebResponse = (FileWebResponse)(
            myFileWebRequest.GetResponse());

        // Display all Headers present in the response received
        // from the Uri.
        Console.WriteLine("\r\nThe following headers were received in
 the " 
            + " response:");

        // Display each header and the key of the response object.
        for (int i = 0; i < myFileWebResponse.get_Headers().get_Count();
            ++i) {
            Console.WriteLine("\nHeader Name:{0}, Header value :{1}",
                myFileWebResponse.get_Headers().get_Keys().get_Item(i),
                myFileWebResponse.get_Headers().get_Item(i));
        }
        myFileWebResponse.Close();
    }
    catch (WebException e) {
        Console.WriteLine("\r\nWebException thrown.The Reason for
 failure " 
            + " is : {0}", e.get_Status());
    }
    catch (System.Exception e) {
        Console.WriteLine("\nThe following Exception was raised : {0}"
,
            e.get_Message());
    }
} //GetPage

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
FileWebResponse クラス
FileWebResponse メンバ
System.Net 名前空間