OpenReadCompletedEventHandler Delegate
.NET Framework 3.0
Represents the method that will handle the OpenReadCompleted event of a WebClient.
Namespace: System.Net
Assembly: System (in system.dll)
Assembly: System (in system.dll)
'Declaration Public Delegate Sub OpenReadCompletedEventHandler ( _ sender As Object, _ e As OpenReadCompletedEventArgs _ ) 'Usage Dim instance As New OpenReadCompletedEventHandler(AddressOf HandlerMethod)
/** @delegate */ public delegate void OpenReadCompletedEventHandler ( Object sender, OpenReadCompletedEventArgs e )
Not applicable.
Parameters
- sender
The source of the event.
- e
A OpenReadCompletedEventArgs containing event data.
The following code example demonstrates downloading a resource for reading.
Public Shared Sub OpenResourceForReading2(ByVal address As String) Dim client As WebClient = New WebClient() AddHandler client.OpenReadCompleted, AddressOf OpenReadCallback2 Dim uri as Uri = New Uri(address) client.OpenReadAsync(uri) End Sub
The following method is called when the download completes.
Private Shared Sub OpenReadCallback2(ByVal sender As Object, ByVal e As OpenReadCompletedEventArgs) Dim reply As Stream = Nothing Dim s As StreamReader = Nothing Try reply = CType(e.Result, Stream) s = New StreamReader(reply) Console.WriteLine(s.ReadToEnd()) Finally If Not s Is Nothing Then s.Close() End If If Not reply Is Nothing Then reply.Close() End If End Try End Sub
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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