DownloadProgressChangedEventArgs Class
.NET Framework 3.0
Provides data for the DownloadProgressChanged event of a WebClient.
Namespace: System.Net
Assembly: System (in system.dll)
Assembly: System (in system.dll)
'Declaration Public Class DownloadProgressChangedEventArgs Inherits ProgressChangedEventArgs 'Usage Dim instance As DownloadProgressChangedEventArgs
public class DownloadProgressChangedEventArgs extends ProgressChangedEventArgs
public class DownloadProgressChangedEventArgs extends ProgressChangedEventArgs
Not applicable.
Instances of this class are passed to the DownloadProgressChangedEventHandler.
The following code example demonstrates setting an event handler for the DownloadProgressChanged event.
' 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
The following code example shows an implementation of a handler for this event.
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
System.Object
System.EventArgs
System.ComponentModel.ProgressChangedEventArgs
System.Net.DownloadProgressChangedEventArgs
System.EventArgs
System.ComponentModel.ProgressChangedEventArgs
System.Net.DownloadProgressChangedEventArgs
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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