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WebHeaderCollection.Remove Metodo

Definizione

Rimuove l'intestazione specificata dalla raccolta.

Overload

Remove(HttpRequestHeader)

Rimuove l'intestazione specificata dalla raccolta.

Remove(HttpResponseHeader)

Rimuove l'intestazione specificata dalla raccolta.

Remove(String)

Rimuove l'intestazione specificata dalla raccolta.

Remove(HttpRequestHeader)

Origine:
WebHeaderCollection.cs
Origine:
WebHeaderCollection.cs
Origine:
WebHeaderCollection.cs

Rimuove l'intestazione specificata dalla raccolta.

public:
 void Remove(System::Net::HttpRequestHeader header);
public void Remove (System.Net.HttpRequestHeader header);
override this.Remove : System.Net.HttpRequestHeader -> unit
Public Sub Remove (header As HttpRequestHeader)

Parametri

header
HttpRequestHeader

Istanza di HttpRequestHeader da rimuovere dall'insieme.

Eccezioni

Questa istanza WebHeaderCollection non consente istanze di HttpRequestHeader.

Commenti

Remove elimina l'intestazione specificata dalla raccolta. Se l'intestazione specificata non esiste, il metodo non fa nulla.

Si applica a

Remove(HttpResponseHeader)

Origine:
WebHeaderCollection.cs
Origine:
WebHeaderCollection.cs
Origine:
WebHeaderCollection.cs

Rimuove l'intestazione specificata dalla raccolta.

public:
 void Remove(System::Net::HttpResponseHeader header);
public void Remove (System.Net.HttpResponseHeader header);
override this.Remove : System.Net.HttpResponseHeader -> unit
Public Sub Remove (header As HttpResponseHeader)

Parametri

header
HttpResponseHeader

Istanza di HttpResponseHeader da rimuovere dall'insieme.

Eccezioni

Questa istanza WebHeaderCollection non consente istanze di HttpResponseHeader.

Commenti

Remove elimina l'intestazione specificata dalla raccolta. Se l'intestazione specificata non esiste, il metodo non fa nulla.

Si applica a

Remove(String)

Origine:
WebHeaderCollection.cs
Origine:
WebHeaderCollection.cs
Origine:
WebHeaderCollection.cs

Rimuove l'intestazione specificata dalla raccolta.

public:
 void Remove(System::String ^ name);
public:
 override void Remove(System::String ^ name);
public void Remove (string name);
public override void Remove (string name);
member this.Remove : string -> unit
override this.Remove : string -> unit
Public Sub Remove (name As String)
Public Overrides Sub Remove (name As String)

Parametri

name
String

Il nome dell'intestazione da rimuovere dalla raccolta.

Eccezioni

name è un'intestazione con restrizioni.

-oppure-

name contiene caratteri non validi.

Esempio

Nell'esempio seguente viene usato il metodo per rimuovere un'intestazione RemoveWebHeaderCollectionda . Dopo la rimozione dell'intestazione, questo esempio stampa tutte le intestazioni esistenti nella schermata per dimostrare che è stato rimosso.

try
{
   // Create a web request for S"www.msn.com".
   HttpWebRequest^ myHttpWebRequest = dynamic_cast<HttpWebRequest^>(WebRequest::Create( "http://www.msn.com" ));

   // Get the headers associated with the request.
   WebHeaderCollection^ myWebHeaderCollection = myHttpWebRequest->Headers;

   // Set the Cache-Control header.
   myWebHeaderCollection->Set( "Cache-Control", "no-cache" );

   // Get the associated response for the above request.
   HttpWebResponse^ myHttpWebResponse = dynamic_cast<HttpWebResponse^>(myHttpWebRequest->GetResponse());

   // Print the headers of the request to console.
   Console::WriteLine( "Print request headers after adding Cache-Control for first request:" );
   printHeaders( myHttpWebRequest->Headers );

   // Remove the Cache-Control header for the new request.
   myWebHeaderCollection->Remove( "Cache-Control" );

   // Get the response for the new request.
   myHttpWebResponse = dynamic_cast<HttpWebResponse^>(myHttpWebRequest->GetResponse());

   // Print the headers of the new request with->Item[Out] the* Cache-Control header.
   Console::WriteLine( "Print request headers after removing Cache-Control for the new request:" );
   printHeaders( myHttpWebRequest->Headers );
   myHttpWebResponse->Close();
}
// Catch exception if trying to remove a restricted header.
catch ( ArgumentException^ e ) 
{
   Console::WriteLine( "Error : Trying to remove a restricted header" );
   Console::WriteLine( "ArgumentException is thrown. Message is : {0}", e->Message );
}
catch ( WebException^ e ) 
{
   Console::WriteLine( "WebException is thrown. Message is : {0}", e->Message );
   if ( e->Status == WebExceptionStatus::ProtocolError )
   {
      Console::WriteLine( "Status Code : {0}", (dynamic_cast<HttpWebResponse^>(e->Response))->StatusCode );
      Console::WriteLine( "Status Description : {0}", (dynamic_cast<HttpWebResponse^>(e->Response))->StatusDescription );
      Console::WriteLine( "Server : {0}", (dynamic_cast<HttpWebResponse^>(e->Response))->Server );
   }
}
catch ( Exception^ e ) 
{
   Console::WriteLine( "Exception is thrown. Message is : {0}", e->Message );
}
try {
    // Create a web request for "www.msn.com".
    HttpWebRequest myHttpWebRequest = (HttpWebRequest) WebRequest.Create("http://www.msn.com");

    // Get the headers associated with the request.
    WebHeaderCollection myWebHeaderCollection = myHttpWebRequest.Headers;

    // Set the Cache-Control header.
    myWebHeaderCollection.Set("Cache-Control", "no-cache");

    // Get the associated response for the above request.
    HttpWebResponse myHttpWebResponse = (HttpWebResponse) myHttpWebRequest.GetResponse();

    // Print the headers of the request to console.
    Console.WriteLine("Print request headers after adding Cache-Control for first request:");
    printHeaders(myHttpWebRequest.Headers);

    // Remove the Cache-Control header for the new request.
    myWebHeaderCollection.Remove("Cache-Control");

    // Get the response for the new request.
    myHttpWebResponse = (HttpWebResponse) myHttpWebRequest.GetResponse();

    // Print the headers of the new request without the Cache-Control header.
    Console.WriteLine("Print request headers after removing Cache-Control for the new request:");
    printHeaders(myHttpWebRequest.Headers);
    myHttpWebResponse.Close();
}
// Catch exception if trying to remove a restricted header.
catch(ArgumentException e) {
    Console.WriteLine("Error : Trying to remove a restricted header");
    Console.WriteLine("ArgumentException is thrown. Message is :" + e.Message);
}
catch(WebException e) {
    Console.WriteLine("WebException is thrown. Message is :" + 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);
        Console.WriteLine("Server : {0}", ((HttpWebResponse)e.Response).Server);
    }
}
catch(Exception e) {
    Console.WriteLine("Exception is thrown. Message is :" + e.Message);
}
Public Shared Sub Main()
  Try
        'Create a web request for "www.msn.com".
        Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create("http://www.msn.com"), HttpWebRequest)
        
        'Get the headers associated with the request.
        Dim myWebHeaderCollection As WebHeaderCollection = myHttpWebRequest.Headers
        
        'Set the Cache-Control header.
        myWebHeaderCollection.Set("Cache-Control", "no-cache")
        
        'Get the associated response for the above request.
        Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
        
        'Print the headers of the request to console.
        Console.WriteLine("Print request headers after adding Cache-Control for first request")
        printHeaders(myHttpWebRequest.Headers)
        
   
        'Remove the Cache-Control header for the new request.
        myWebHeaderCollection.Remove("Cache-Control")
        
        'Code example for "Remove" method of "WebHeaderCollection" ends here.
        'Get the response for the new request.
        myHttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
        
        'Print the headers of the new request without the Cache-Control header.
        Console.WriteLine("Print request headers after removing Cache-Control for the new request")
        printHeaders(myHttpWebRequest.Headers)
        myHttpWebResponse.Close()
    'Catch exception if trying to remove a restricted header.
    Catch e As ArgumentException
        Console.WriteLine("Error : Trying to remove a restricted header")
        Console.WriteLine(e.Message)
    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)
            Console.WriteLine("Server : {0}", CType(e.Response, HttpWebResponse).Server)
        End If
    Catch e As Exception
        Console.WriteLine(e.Message)
    End Try

End Sub

Commenti

Remove elimina l'intestazione specificata dalla raccolta. Se l'intestazione specificata non esiste, il metodo restituisce.

Si applica a