WebClient.DownloadStringCompleted Evento

Definição

Namespace:

System.Net

Assembly:

System.Net.WebClient.dll

Assembly:

System.dll

Assembly:

netstandard.dll

Ocorre quando uma operação de download de recurso assíncrono é concluída.

public:
 event System::Net::DownloadStringCompletedEventHandler ^ DownloadStringCompleted;

public event System.Net.DownloadStringCompletedEventHandler? DownloadStringCompleted;

public event System.Net.DownloadStringCompletedEventHandler DownloadStringCompleted;

member this.DownloadStringCompleted : System.Net.DownloadStringCompletedEventHandler 

Public Custom Event DownloadStringCompleted As DownloadStringCompletedEventHandler 

Public Event DownloadStringCompleted As DownloadStringCompletedEventHandler 

Tipo de evento

DownloadStringCompletedEventHandler

Exemplos

O exemplo de código a seguir demonstra a configuração de um manipulador de eventos para esse evento.

// Sample call : DownloadStringInBackground2 ("http://www.contoso.com/GameScores.html");
void DownloadStringInBackground2( String^ address )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);

   // Specify that the DownloadStringCallback2 method gets called
   // when the download completes.
   client->DownloadStringCompleted += gcnew DownloadStringCompletedEventHandler( DownloadStringCallback2 );
   client->DownloadStringAsync( uri );
}

// Sample call : DownloadStringInBackground2 ("http://www.contoso.com/GameScores.html");
public static void DownloadStringInBackground2(string address)
{
    WebClient client = new WebClient();
    Uri uri = new Uri(address);

    // Specify that the DownloadStringCallback2 method gets called
    // when the download completes.
    client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(DownloadStringCallback2);
    client.DownloadStringAsync(uri);
}

'  Sample call : DownloadStringInBackground2 ("http:' www.contoso.com/GameScores.html")
Public Shared Sub DownloadStringInBackground2(ByVal address As String)

    Dim client As WebClient = New WebClient()

    '  Specify that the DownloadStringCallback2 method gets called
    '  when the download completes.
    AddHandler client.DownloadStringCompleted, AddressOf DownloadStringCallback2
                Dim uri as Uri = New Uri(address)
    client.DownloadStringAsync(uri)
End Sub

Comentários

Esse evento é gerado sempre que uma operação assíncrona para baixar um recurso como uma cadeia de caracteres é concluída. Essas operações são iniciadas chamando os DownloadStringAsync métodos.

O DownloadStringCompletedEventHandler representante desse evento. A DownloadStringCompletedEventArgs classe fornece ao manipulador de eventos dados de evento.

Para obter mais informações sobre como lidar com eventos, consulte Manipulação e geração de eventos.