HttpWebResponse.Headers Propriedade

Definição

Namespace:

System.Net

Assembly:

System.Net.Requests.dll

Origem:

HttpWebResponse.cs

Obtém os cabeçalhos que estão associados a essa resposta do servidor.

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 da propriedade

WebHeaderCollection

Um WebHeaderCollection que contém as informações de cabeçalho retornadas com a resposta.

Exceções

ObjectDisposedException

A instância atual foi descartada.

Exemplos

O exemplo a seguir grava o conteúdo de todos os cabeçalhos de resposta no console.

// Creates an HttpWebRequest for the specified URL.
HttpWebRequest^ myHttpWebRequest = dynamic_cast<HttpWebRequest^>(WebRequest::Create( url ));

// Sends the HttpWebRequest and waits for response.
HttpWebResponse^ myHttpWebResponse = dynamic_cast<HttpWebResponse^>(myHttpWebRequest->GetResponse());

// Displays all the headers present in the response received from the URI.
Console::WriteLine( "\r\nThe following headers were received in the response:" );

// Displays each header and its key associated with the response.
for ( int i = 0; i < myHttpWebResponse->Headers->Count; ++i )
   Console::WriteLine( "\nHeader Name: {0}, Value : {1}",
      myHttpWebResponse->Headers->Keys[ i ],
      myHttpWebResponse->Headers[ (System::Net::HttpRequestHeader)i ] );

// Releases the resources of the response.
myHttpWebResponse->Close();

// Creates an HttpWebRequest for the specified URL.
HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
// Sends the HttpWebRequest and waits for response.
HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();

// Displays all the headers present in the response received from the URI.
Console.WriteLine("\r\nThe following headers were received in the response:");
// Displays each header and it's key associated with the response.
for(int i=0; i < myHttpWebResponse.Headers.Count; ++i)
    Console.WriteLine("\nHeader Name:{0}, Value :{1}",myHttpWebResponse.Headers.Keys[i],myHttpWebResponse.Headers[i]);
// Releases the resources of the response.
myHttpWebResponse.Close();

' Creates an HttpWebRequest with the specified URL. 
Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create(url), HttpWebRequest)
' Sends the HttpWebRequest and waits for a response.
Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
' Displays all the Headers present in the response received from the URI.
Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "The following headers were received in the response")
'The Headers property is a WebHeaderCollection. Use it's properties to traverse the collection and display each header.
Dim i As Integer
While i < myHttpWebResponse.Headers.Count
    Console.WriteLine(ControlChars.Cr + "Header Name:{0}, Value :{1}", myHttpWebResponse.Headers.Keys(i), myHttpWebResponse.Headers(i))
  i = i + 1
End While
myHttpWebResponse.Close()

Comentários

A Headers propriedade é uma coleção de pares nome/valor que contém os valores de cabeçalho HTTP retornados com a resposta. As informações comuns de cabeçalho retornadas do recurso da Internet são expostas como propriedades da HttpWebResponse classe . A tabela a seguir lista cabeçalhos comuns que a API expõe como propriedades.

Cabeçalho	Propriedade
Codificação de conteúdo	ContentEncoding
Content-Length	ContentLength
Tipo de conteúdo	ContentType
Last-Modified	LastModified
Servidor	Server