DownloadProgressChangedEventHandler DownloadProgressChangedEventHandler DownloadProgressChangedEventHandler DownloadProgressChangedEventHandler Delegate

정의

DownloadProgressChangedWebClient 이벤트를 처리할 메서드를 나타냅니다.Represents the method that will handle the DownloadProgressChanged event of a WebClient.

public delegate void DownloadProgressChangedEventHandler(System::Object ^ sender, DownloadProgressChangedEventArgs ^ e);
public delegate void DownloadProgressChangedEventHandler(object sender, DownloadProgressChangedEventArgs e);
type DownloadProgressChangedEventHandler = delegate of obj * DownloadProgressChangedEventArgs -> unit
Public Delegate Sub DownloadProgressChangedEventHandler(sender As Object, e As DownloadProgressChangedEventArgs)

매개 변수

sender
Object Object Object Object

이벤트 소스입니다.The source of the event.

상속
DownloadProgressChangedEventHandlerDownloadProgressChangedEventHandlerDownloadProgressChangedEventHandlerDownloadProgressChangedEventHandler

예제

다음 코드 예제에 대 한 이벤트 처리기를 설정 하는 방법을 보여 줍니다는 WebClient.DownloadProgressChanged 이벤트입니다.The following code example demonstrates setting an event handler for the WebClient.DownloadProgressChanged event.

// Sample call : DownLoadFileInBackground2 ("http://www.contoso.com/logs/January.txt");
void DownLoadFileInBackground2( String^ address )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);
   
   // Specify that the DownloadFileCallback method gets called
   // when the download completes.
   client->DownloadFileCompleted += gcnew AsyncCompletedEventHandler( DownloadFileCallback2 );
   
   // Specify a progress notification handler.
   client->DownloadProgressChanged += gcnew DownloadProgressChangedEventHandler( DownloadProgressCallback );
   client->DownloadFileAsync( uri, "serverdata.txt" );
}


// Sample call : DownLoadFileInBackground2 ("http://www.contoso.com/logs/January.txt");
public static void DownLoadFileInBackground2 (string address)
{
    WebClient client = new WebClient ();
    Uri uri = new Uri(address);

    // Specify that the DownloadFileCallback method gets called
    // when the download completes.
    client.DownloadFileCompleted += new AsyncCompletedEventHandler (DownloadFileCallback2);
    // Specify a progress notification handler.
    client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgressCallback);
    client.DownloadFileAsync (uri, "serverdata.txt");
}

'  Sample call : DownLoadFileInBackground2 ("http:' www.contoso.com/logs/January.txt")
Public Shared Sub DownLoadFileInBackground2(ByVal address As String)

    Dim client As WebClient = New WebClient()

    '  Specify that the DownloadFileCallback method gets called
    '  when the download completes.
    AddHandler client.DownloadFileCompleted, AddressOf DownloadFileCallback2
    '  Specify a progress notification handler.
    AddHandler client.DownloadProgressChanged, AddressOf DownloadProgressCallback
                Dim uri as Uri = New Uri(address)
    client.DownloadFileAsync(uri, "serverdata.txt")
End Sub

설명

DownloadProgressChangedEventHandler 대리자를 만들 때, 이벤트를 처리할 메서드를 식별합니다.When you create a DownloadProgressChangedEventHandler delegate, you identify the method that will handle the event. 이벤트를 이벤트 처리기와 연결하려면 대리자의 인스턴스를 해당 이벤트에 추가합니다.To associate the event with your event handler, add an instance of the delegate to the event. 대리자를 제거하지 않는 경우 이벤트가 발생할 때마다 이벤트 처리기가 호출됩니다.The event handler is called whenever the event occurs, unless you remove the delegate. 이벤트 처리기 대리자에 대 한 자세한 내용은 참조 하세요. 이벤트 처리 및 발생합니다.For more information about event handler delegates, see Handling and Raising Events. 이벤트 처리 및 발생Handling and Raising Events

참고

서버에서 다운로드 한 파일 (예: 수동 FTP 연결의 경우 처럼)의 크기를 보내지 않으면 ProgressPercentage 있습니다 항상 0 이어야 합니다.If the server does not send the size of the downloaded file (such as in the case of a passive FTP connection), ProgressPercentage may always be zero.

확장 메서드

GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate)

지정된 대리자가 나타내는 메서드를 나타내는 개체를 가져옵니다.Gets an object that represents the method represented by the specified delegate.

적용 대상