FileWebResponse.Headers Propiedad

Referencia

Definición

Espacio de nombres:: System.Net

Ensamblados:: netstandard.dll, System.Net.Requests.dll

Ensamblado:: System.Net.Requests.dll

Ensamblado:: System.dll

Ensamblado:: netstandard.dll

Source:: FileWebResponse.cs

Source:: FileWebResponse.cs

Source:: FileWebResponse.cs

Importante

Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.

Obtiene una colección de pares de nombre/valor de encabezado asociados a la respuesta.

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

public override System.Net.WebHeaderCollection Headers { get; }

member this.Headers : System.Net.WebHeaderCollection

Public Overrides ReadOnly Property Headers As WebHeaderCollection

Valor de propiedad

WebHeaderCollection

WebHeaderCollection que contiene los pares de nombre/valor de encabezado que están asociados a la respuesta.

Ejemplos

En el ejemplo siguiente se usa la Headers propiedad para recuperar los pares nombre-valor asociados a la respuesta.

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.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);
         }
}

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

Comentarios

La Headers propiedad contiene dos pares nombre-valor, uno para la longitud del contenido y otro para el tipo de contenido, ambos también se exponen como propiedades y ContentType ContentLength .

Se aplica a

Producto	Versiones
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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