WebClient.UploadFileCompleted 事件

定义

命名空间:

System.Net

程序集:

System.Net.WebClient.dll

程序集:

System.dll

程序集:

netstandard.dll

在异步文件上载操作完成时发生。

public:
 event System::Net::UploadFileCompletedEventHandler ^ UploadFileCompleted;

public event System.Net.UploadFileCompletedEventHandler? UploadFileCompleted;

public event System.Net.UploadFileCompletedEventHandler UploadFileCompleted;

member this.UploadFileCompleted : System.Net.UploadFileCompletedEventHandler 

Public Custom Event UploadFileCompleted As UploadFileCompletedEventHandler 

Public Event UploadFileCompleted As UploadFileCompletedEventHandler 

事件类型

UploadFileCompletedEventHandler

示例

下面的代码示例演示如何为此事件设置事件处理程序。

// 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

注解

每次异步文件上传操作完成时都会引发此事件。 异步文件上传是通过调用方法启动的 UploadFileAsync 。

此 UploadFileCompletedEventHandler 事件的委托。 该 UploadFileCompletedEventArgs 类为事件处理程序提供事件数据。

有关如何处理事件的详细信息，请参阅 处理和引发事件。