WebClient.UploadProgressChanged イベント

  • リファレンス

定義

名前空間:
System.Net
アセンブリ:
System.Net.WebClient.dll
アセンブリ:
System.dll
アセンブリ:
netstandard.dll
ソース:
WebClient.cs
ソース:
WebClient.cs
ソース:
WebClient.cs

非同期アップロード操作が一部またはすべてのデータを正常に転送したときに発生します。

public:
 event System::Net::UploadProgressChangedEventHandler ^ UploadProgressChanged;
public event System.Net.UploadProgressChangedEventHandler? UploadProgressChanged;
public event System.Net.UploadProgressChangedEventHandler UploadProgressChanged;
member this.UploadProgressChanged : System.Net.UploadProgressChangedEventHandler 
Public Custom Event UploadProgressChanged As UploadProgressChangedEventHandler 
Public Event UploadProgressChanged As UploadProgressChangedEventHandler

イベントの種類

UploadProgressChangedEventHandler

例

次のコード例は、このイベントのイベント ハンドラーを設定する方法を示しています。

// Sample call: UploadFileInBackground2("http://www.contoso.com/fileUpload.aspx", "data.txt")
void UploadFileInBackground2( String^ address, String^ fileName )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);

   client->UploadFileCompleted +=
     gcnew UploadFileCompletedEventHandler (UploadFileCallback2);

   // Specify a progress notification handler.
   client->UploadProgressChanged +=
       gcnew UploadProgressChangedEventHandler( UploadProgressCallback );
   client->UploadFileAsync( uri, "POST", fileName );
   Console::WriteLine( "File upload started." );
}

// Sample call: UploadFileInBackground2("http://www.contoso.com/fileUpload.aspx", "data.txt")
public static void UploadFileInBackground2(string address, string fileName)
{
    WebClient client = new WebClient();
    Uri uri = new Uri(address);

    client.UploadFileCompleted += new UploadFileCompletedEventHandler(UploadFileCallback2);

    // Specify a progress notification handler.
    client.UploadProgressChanged += new UploadProgressChangedEventHandler(UploadProgressCallback);
    client.UploadFileAsync(uri, "POST", fileName);
    Console.WriteLine("File upload started.");
}

'  Sample call: UploadFileInBackground2("http:' www.contoso.com/fileUpload.aspx", "data.txt")
Public Shared Sub UploadFileInBackground2(ByVal address As String, ByVal fileName As String)

    Dim client As WebClient = New WebClient()
                Dim uri as Uri =  New Uri(address)
    AddHandler client.UploadFileCompleted, AddressOf UploadFileCallback2

    '  Specify a progress notification handler.
    AddHandler client.UploadProgressChanged, AddressOf UploadProgressCallback
    client.UploadFileAsync(uri, "POST", fileName)
    Console.WriteLine("File upload started.")
End Sub

次のコード例は、このイベントのハンドラーの実装を示しています。

static void UploadProgressCallback(Object^ sender,
          UploadProgressChangedEventArgs^ e)
      {
          // Displays the operation identifier, and the transfer progress.
          Console::WriteLine("{0}    uploaded {1} of {2} bytes. {3} % complete...",
              (String ^)e->UserState,
              e->BytesSent,
              e->TotalBytesToSend,
              e->ProgressPercentage);
      }
static void DownloadProgressCallback(Object^ sender,
          DownloadProgressChangedEventArgs^ e)
      {
          // Displays the operation identifier, and the transfer progress.
          Console::WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...",
              (String ^)e->UserState,
              e->BytesReceived,
              e->TotalBytesToReceive,
              e->ProgressPercentage);
      }

private static void UploadProgressCallback(object sender, UploadProgressChangedEventArgs e)
{
    // Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    uploaded {1} of {2} bytes. {3} % complete...",
        (string)e.UserState,
        e.BytesSent,
        e.TotalBytesToSend,
        e.ProgressPercentage);
}
private static void DownloadProgressCallback(object sender, DownloadProgressChangedEventArgs e)
{
    // Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...",
        (string)e.UserState,
        e.BytesReceived,
        e.TotalBytesToReceive,
        e.ProgressPercentage);
}

Private Shared Sub UploadProgressCallback(ByVal sender As Object, ByVal e As UploadProgressChangedEventArgs)

    '  Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    uploaded {1} of {2} bytes. {3} % complete...", _
     CStr(e.UserState), e.BytesSent, e.TotalBytesToSend, e.ProgressPercentage)
End Sub
Private Shared Sub DownloadProgressCallback(ByVal sender As Object, ByVal e As DownloadProgressChangedEventArgs)

    '  Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...", _
     CStr(e.UserState), e.BytesReceived, e.TotalBytesToReceive, e.ProgressPercentage)
End Sub

注釈

注意

WebRequest、HttpWebRequest、ServicePoint、WebClient は廃止されており、新しい開発には使用しないでください。 代わりに HttpClient を使用してください。

このイベントは、非同期アップロードが進行するたびに発生します。 このイベントは、次のいずれかの方法を使用してアップロードが開始されたときに発生します。

方式 形容
UploadDataAsync 呼び出し元のスレッドをブロックせずに、Byte 配列をリソースに送信します。
UploadFileAsync 呼び出し元のスレッドをブロックせずに、ローカル ファイルをリソースに送信します。
UploadValuesAsync NameValueCollection をリソースに送信し、呼び出し元のスレッドをブロックせずに、応答を含む Byte 配列を返します。

UploadProgressChangedEventHandler は、このイベントのデリゲートです。 UploadProgressChangedEventArgs クラスは、イベント データをイベント ハンドラーに提供します。

イベントの処理方法の詳細については、「イベントの処理と発生」を参照してください。

適用対象