FileWebResponse.Headers-Eigenschaft

Ruft eine Auflistung der Name-Wert-Paare für Header auf, die der Antwort zugeordnet sind.

Namespace: System.Net
Assembly: System (in system.dll)

Syntax

'Declaration
Public Overrides ReadOnly Property Headers As WebHeaderCollection
'Usage
Dim instance As FileWebResponse
Dim value As WebHeaderCollection

value = instance.Headers

public override WebHeaderCollection Headers { get; }

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

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

public override function get Headers () : WebHeaderCollection

Eigenschaftenwert

Eine WebHeaderCollection mit den der Antwort zugeordneten Name-Wert-Paaren für Header.

Hinweise

Die Headers-Eigenschaft enthält zwei Name-Wert-Paare, eines für die Inhaltslänge und eines für den Inhaltstyp. Beide werden auch als die Eigenschaften ContentLength und ContentType verfügbar gemacht.

Beispiel

Im folgenden Beispiel werden mit der Headers-Eigenschaft die Name-Wert-Paare abgerufen, die der Antwort zugeordnet sind.

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

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);
         }
}

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 );
   }

}

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

Plattformen

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

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

FileWebResponse-Klasse
FileWebResponse-Member
System.Net-Namespace