OpenWriteCompletedEventArgs.Result Properti

Definisi

Ruang nama:

System.Net

Rakitan:

System.Net.WebClient.dll

Sumber:

WebClient.cs

Mendapatkan aliran bisa-tulis yang digunakan untuk mengirim data ke server.

public:
 property System::IO::Stream ^ Result { System::IO::Stream ^ get(); };

public System.IO.Stream Result { get; }

member this.Result : System.IO.Stream

Public ReadOnly Property Result As Stream

Nilai Properti

Stream

Tempat Stream Anda dapat menulis data untuk diunggah.

Contoh

Contoh kode berikut menggunakan aliran yang dikembalikan oleh properti ini.

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

Keterangan

Anda harus memeriksa Error properti dan Cancelled sebelum menggunakan aliran yang dikembalikan oleh properti ini. Error Jika nilai properti adalah Exception objek atau Cancelled nilai properti adalah true, operasi asinkron tidak selesai dengan benar dan Result nilai properti tidak akan valid.