OpenWriteCompletedEventArgs OpenWriteCompletedEventArgs OpenWriteCompletedEventArgs OpenWriteCompletedEventArgs Class

Definición

Proporciona datos para el evento OpenWriteCompleted.Provides data for the OpenWriteCompleted event.

public ref class OpenWriteCompletedEventArgs : System::ComponentModel::AsyncCompletedEventArgs
public class OpenWriteCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs
type OpenWriteCompletedEventArgs = class
    inherit AsyncCompletedEventArgs
Public Class OpenWriteCompletedEventArgs
Inherits AsyncCompletedEventArgs
Herencia
OpenWriteCompletedEventArgsOpenWriteCompletedEventArgsOpenWriteCompletedEventArgsOpenWriteCompletedEventArgs

Ejemplos

El siguiente ejemplo de código muestra cómo abrir una secuencia para escribir los datos que se cargarán.The following code example demonstrates opening a stream to write data to be uploaded.

void OpenResourceForPosting( String^ address )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);
   
   // Specify that the OpenWriteCallback method gets called
   // when the writeable stream is available.
   client->OpenWriteCompleted += gcnew OpenWriteCompletedEventHandler( OpenWriteCallback2 );
   client->OpenWriteAsync( uri );
   
   // Applications can perform other tasks
   // while waiting for the upload to complete.
}


public static void OpenResourceForPosting (string address)
{
    WebClient client = new WebClient ();
    Uri uri = new Uri(address);

    // Specify that the OpenWriteCallback method gets called
    // when the writeable stream is available.
    client.OpenWriteCompleted += new OpenWriteCompletedEventHandler (OpenWriteCallback2);
    client.OpenWriteAsync (uri);
    // Applications can perform other tasks
    // while waiting for the upload to complete.
}

Public Shared Sub OpenResourceForPosting(ByVal address As String)

	Dim client As WebClient = New WebClient()
	'  Specify that the OpenWriteCallback method gets called
	'  when the writeable stream is available.
	AddHandler client.OpenWriteCompleted, AddressOf OpenWriteCallback2
                      Dim uri as Uri = New Uri(address)
	client.OpenWriteAsync(uri)
	'  Applications can perform other tasks
	'  while waiting for the upload to complete.
End Sub

El siguiente método se llama cuando la secuencia está disponible.The following method is called when the stream is available.

void OpenWriteCallback2( Object^ /*sender*/, OpenWriteCompletedEventArgs^ e )
{
   Stream^ body = nullptr;
   StreamWriter^ s = nullptr;
   try
   {
      body = dynamic_cast<Stream^>(e->Result);
      s = gcnew StreamWriter( body );
      s->AutoFlush = true;
      s->Write( "This is content data to be sent to the server." );
   }
   finally
   {
      if ( s != nullptr )
      {
         s->Close();
      }
      if ( body != nullptr )
      {
         body->Close();
      }
   }

}


private static void OpenWriteCallback2 (Object sender, OpenWriteCompletedEventArgs e)
{
    Stream body = null;
    StreamWriter s = null;

    try
    {
        body = (Stream)e.Result;
        s = new StreamWriter (body);
        s.AutoFlush = true;
        s.Write ("This is content data to be sent to the server.");
    }
    finally
    {
        if (s != null)
        {
            s.Close ();
        }

        if (body != null)
        {
            body.Close ();
        }
    }
}

Private Shared Sub OpenWriteCallback2(ByVal sender As Object, ByVal e As OpenWriteCompletedEventArgs)

    Dim body As Stream = Nothing
    Dim s As StreamWriter = Nothing

    Try

        body = CType(e.Result, Stream)
        s = New StreamWriter(body)
        s.AutoFlush = True
        s.Write("This is content data to be sent to the server.")
    Finally

        If Not s Is Nothing Then

            s.Close()
        End If

        If Not body Is Nothing Then

            body.Close()
        End If
    End Try
End Sub

Comentarios

Las instancias de esta clase se pasan a OpenWriteCompletedEventHandler métodos.Instances of this class are passed to OpenWriteCompletedEventHandler methods.

Propiedades

Cancelled Cancelled Cancelled Cancelled

Obtiene un valor que indica si se ha cancelado una operación asincrónica.Gets a value indicating whether an asynchronous operation has been canceled.

(Inherited from AsyncCompletedEventArgs)
Error Error Error Error

Obtiene un valor que indica el error que se produjo durante una operación asincrónica.Gets a value indicating which error occurred during an asynchronous operation.

(Inherited from AsyncCompletedEventArgs)
Result Result Result Result

Obtiene una secuencia que admite escritura y que se utiliza para enviar los datos a un servidor.Gets a writable stream that is used to send data to a server.

UserState UserState UserState UserState

Obtiene el identificador único de la tarea asincrónica.Gets the unique identifier for the asynchronous task.

(Inherited from AsyncCompletedEventArgs)

Métodos

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficial del objeto Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
RaiseExceptionIfNecessary() RaiseExceptionIfNecessary() RaiseExceptionIfNecessary() RaiseExceptionIfNecessary()

Genera una excepción proporcionada por el usuario si se ha producido un error en una operación asincrónica.Raises a user-supplied exception if an asynchronous operation failed.

(Inherited from AsyncCompletedEventArgs)
ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Se aplica a