WebHeaderCollection.Remove Método

Definição

Remove o cabeçalho especificado da coleção.Removes the specified header from the collection.

Sobrecargas

Remove(HttpRequestHeader)

Remove o cabeçalho especificado da coleção.Removes the specified header from the collection.

Remove(HttpResponseHeader)

Remove o cabeçalho especificado da coleção.Removes the specified header from the collection.

Remove(String)

Remove o cabeçalho especificado da coleção.Removes the specified header from the collection.

Remove(HttpRequestHeader)

Remove o cabeçalho especificado da coleção.Removes the specified header from the collection.

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)

Parâmetros

header
HttpRequestHeader

A instância HttpRequestHeader a ser removida da coleção.The HttpRequestHeader instance to remove from the collection.

Exceções

Essa instância WebHeaderCollection não permite instâncias de HttpRequestHeader.This WebHeaderCollection instance does not allow instances of HttpRequestHeader.

Comentários

Remove exclui o cabeçalho especificado da coleção.Remove deletes the specified header from the collection. Se o cabeçalho especificado não existir, o método não fará nada.If the specified header does not exist, the method does nothing.

Aplica-se a

Remove(HttpResponseHeader)

Remove o cabeçalho especificado da coleção.Removes the specified header from the collection.

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)

Parâmetros

header
HttpResponseHeader

A instância HttpResponseHeader a ser removida da coleção.The HttpResponseHeader instance to remove from the collection.

Exceções

Essa instância WebHeaderCollection não permite instâncias de HttpResponseHeader.This WebHeaderCollection instance does not allow instances of HttpResponseHeader.

Comentários

Remove exclui o cabeçalho especificado da coleção.Remove deletes the specified header from the collection. Se o cabeçalho especificado não existir, o método não fará nada.If the specified header does not exist, the method does nothing.

Aplica-se a

Remove(String)

Remove o cabeçalho especificado da coleção.Removes the specified header from the collection.

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)

Parâmetros

name
String

O nome do cabeçalho a ser removido da coleção.The name of the header to remove from the collection.

Exceções

name é nullEmpty.name is nullEmpty.

name é um cabeçalho restrito.name is a restricted header.

- ou --or- name contém caracteres inválidos.name contains invalid characters.

Exemplos

O exemplo a seguir usa o Remove método para remover um cabeçalho do WebHeaderCollection .The following example uses the Remove method to remove a header from the WebHeaderCollection. Depois que o cabeçalho é removido, este exemplo imprime todos os cabeçalhos existentes na tela para provar que ele foi removido.After the header is removed, this example prints all existing headers to the screen to prove that it has been removed.

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

Comentários

Remove exclui o cabeçalho especificado da coleção.Remove deletes the specified header from the collection. Se o cabeçalho especificado não existir, o método retornará.If the specified header does not exist, the method returns.

Aplica-se a