Assembly: System (in System.dll)
'Declaration Public Delegate Sub UploadDataCompletedEventHandler ( _ sender As Object, _ e As UploadDataCompletedEventArgs _ )
When you create a delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see Events and Delegates.
The following code example demonstrates asynchronously uploading data.
Public Shared Sub UploadDataInBackground2(ByVal address As String) Dim client As WebClient = New WebClient() Dim text As String = "Time = 12:00am temperature = 50" Dim data() As Byte = System.Text.Encoding.UTF8.GetBytes(text) Dim method As String = "POST" AddHandler client.UploadDataCompleted, AddressOf UploadDataCallback2 Dim uri as Uri = New Uri(address) client.UploadDataAsync(uri, method, data) End Sub
The following method is called when the upload completes.