WebException.Response WebException.Response WebException.Response WebException.Response Property

Definizione

Recupera la risposta restituita dall'host remoto.Gets the response that the remote host returned.

public:
 property System::Net::WebResponse ^ Response { System::Net::WebResponse ^ get(); };
public System.Net.WebResponse Response { get; }
member this.Response : System.Net.WebResponse
Public ReadOnly Property Response As WebResponse

Valore della proprietà

Se una risposta è disponibile dalla risorsa Internet, un'istanza di WebResponse contenente la risposta di errore da una risorsa Internet; in caso contrario, null.If a response is available from the Internet resource, a WebResponse instance that contains the error response from an Internet resource; otherwise, null.

Esempi

Nell'esempio seguente viene controllata Status la proprietà e viene stampata la StatusCode console StatusDescription di e dell' HttpWebResponse istanza sottostante.The following example checks the Status property and prints to the console the StatusCode and StatusDescription of the underlying HttpWebResponse instance.

try
{
   // Create a web request for an unknown server (this raises the WebException).
   HttpWebRequest^ myHttpWebRequest = (HttpWebRequest^)(WebRequest::Create( "http://unknown.unknown.com" ));
   
   // Get the associated response for the above request.
   HttpWebResponse^ myHttpWebResponse = (HttpWebResponse^)(myHttpWebRequest->GetResponse());
   myHttpWebResponse->Close();
}
catch ( WebException^ e ) 
{
   Console::WriteLine( "This program is expected to throw WebException on successful run." +
      "\n\nException Message : " + e->Message );
   if ( e->Status == WebExceptionStatus::ProtocolError )
   {
      Console::WriteLine( "Status Code: {0}", ( (HttpWebResponse^)(e->Response) )->StatusCode );
      Console::WriteLine( "Status Description: {0}", ( (HttpWebResponse^)(e->Response) )->StatusDescription );
   }
}
catch ( Exception^ e ) 
{
   Console::WriteLine( e->Message );
}
try {
   // Create a web request for an invalid site. Substitute the "invalid site" strong in the Create call with a invalid name.
     HttpWebRequest myHttpWebRequest = (HttpWebRequest) WebRequest.Create("invalid site");

    // Get the associated response for the above request.
     HttpWebResponse myHttpWebResponse = (HttpWebResponse) myHttpWebRequest.GetResponse();
    myHttpWebResponse.Close();
}
catch(WebException e) {
    Console.WriteLine("This program is expected to throw WebException on successful run."+
                        "\n\nException Message :" + e.Message);
    if(e.Status == WebExceptionStatus.ProtocolError) {
        Console.WriteLine("Status Code : {0}", ((HttpWebResponse)e.Response).StatusCode);
        Console.WriteLine("Status Description : {0}", ((HttpWebResponse)e.Response).StatusDescription);
    }
}
catch(Exception e) {
    Console.WriteLine(e.Message);
}
 Try
     'Create a web request for an invalid site. Substitute the "invalid site" strong in the Create call with a invalid name.
     Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create("invalid site"), HttpWebRequest)
     
     'Get the associated response for the above request.
     Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
     myHttpWebResponse.Close()
 Catch e As WebException
     Console.WriteLine(e.Message)
     
      If e.Status = WebExceptionStatus.ProtocolError Then
         Console.WriteLine("Status Code : {0}", CType(e.Response, HttpWebResponse).StatusCode)
         Console.WriteLine("Status Description : {0}", CType(e.Response, HttpWebResponse).StatusDescription)
     End If

Catch e As Exception
     Console.WriteLine(e.Message)
 End Try

Commenti

Alcuni protocolli Internet, ad esempio HTTP, restituiscono risposte altrimenti valide indicanti che si è verificato un errore a livello di protocollo.Some Internet protocols, such as HTTP, return otherwise valid responses indicating that an error has occurred at the protocol level. Quando la risposta a una richiesta Internet indica un errore, WebRequest.GetResponse imposta la Status proprietà su WebExceptionStatus.ProtocolError e fornisce Response l' WebResponse oggetto che contiene il messaggio di errore nella proprietà di WebException generata.When the response to an Internet request indicates an error, WebRequest.GetResponse sets the Status property to WebExceptionStatus.ProtocolError and provides the WebResponse that contains the error message in the Response property of the WebException that was thrown. L'applicazione può esaminare WebResponse per determinare l'errore effettivo.The application can examine the WebResponse to determine the actual error.

Si applica a