• Article

WebClient.OnUploadProgressChanged Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Raises the UploadProgressChanged event.

Namespace:  System.Net
Assembly:  System.Net (in System.Net.dll)

Syntax

'Declaration
Protected Overridable Sub OnUploadProgressChanged ( _
    e As UploadProgressChangedEventArgs _
)

protected virtual void OnUploadProgressChanged(
    UploadProgressChangedEventArgs e
)

Parameters

Remarks

This event is raised each time an asynchronous upload makes progress. This event is raised when uploads are started using any of the following methods.

Method

Description

UploadStringAsync

Sends a String to the resource, without blocking the calling thread.

Classes that inherit from this class can override this method to perform additional tasks when the UploadProgressChanged event occurs.

Raising an event invokes the event handler through a delegate.

The OnUploadProgressChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnUploadProgressChanged in a derived class, be sure to call the base class’s OnUploadProgressChanged method so that registered delegates receive the event.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.