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.NET Framework 4.5

.NET Framework Class Library

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AuthenticationManager Class

AuthenticationSchemes Enumeration

AuthenticationSchemeSelector Delegate

Authorization Class

BindIPEndPoint Delegate

Cookie Class

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CookieContainer Class

CookieException Class

CredentialCache Class

DecompressionMethods Enumeration

Dns Class

DnsEndPoint Class

DnsPermission Class

DnsPermissionAttribute Class

DownloadDataCompletedEventArgs Class

DownloadDataCompletedEventHandler Delegate

DownloadProgressChangedEventArgs Class

DownloadProgressChangedEventHandler Delegate

DownloadStringCompletedEventArgs Class

DownloadStringCompletedEventHandler Delegate

EndpointPermission Class

FileWebRequest Class

FileWebResponse Class

FtpStatusCode Enumeration

FtpWebRequest Class

FtpWebResponse Class

GlobalProxySelection Class

HttpContinueDelegate Delegate

HttpListener Class

HttpListener.ExtendedProtectionSelector Delegate

HttpListenerBasicIdentity Class

HttpListenerContext Class

HttpListenerException Class

HttpListenerPrefixCollection Class

HttpListenerRequest Class

HttpListenerResponse Class

HttpListenerTimeoutManager Class

HttpRequestHeader Enumeration

HttpResponseHeader Enumeration

HttpStatusCode Enumeration

HttpVersion Class

HttpWebRequest Class

HttpWebResponse Class

IAuthenticationModule Interface

ICertificatePolicy Interface

ICredentialPolicy Interface

ICredentials Interface

ICredentialsByHost Interface

INetworkProgress Interface

IPAddress Class

IPEndPoint Class

IPEndPointCollection Class

IPHostEntry Class

IUnsafeWebRequestCreate Interface

IWebProxy Interface

IWebProxyScript Interface

IWebRequestCreate Interface

NetworkAccess Enumeration

NetworkCredential Class

NetworkProgressChangedEventArgs Class

OpenReadCompletedEventArgs Class

OpenReadCompletedEventHandler Delegate

OpenWriteCompletedEventArgs Class

OpenWriteCompletedEventHandler Delegate

ProtocolViolationException Class

SecurityProtocolType Enumeration

ServicePoint Class

ServicePointManager Class

SocketAddress Class

SocketPermission Class

SocketPermissionAttribute Class

TransportContext Class

TransportType Enumeration

UiSynchronizationContext Class

UploadDataCompletedEventArgs Class

UploadDataCompletedEventHandler Delegate

UploadFileCompletedEventArgs Class

UploadFileCompletedEventHandler Delegate

UploadProgressChangedEventArgs Class

UploadProgressChangedEventHandler Delegate

UploadStringCompletedEventArgs Class

UploadStringCompletedEventHandler Delegate

UploadValuesCompletedEventArgs Class

UploadValuesCompletedEventHandler Delegate

WebClient Class

WebException Class

WebExceptionStatus Enumeration

WebHeaderCollection Class

WebPermission Class

WebPermissionAttribute Class

WebRequest Class

WebRequestMethods Class

WebRequestMethods.File Class

WebRequestMethods.Ftp Class

WebRequestMethods.Http Class

WebResponse Class

WebUtility Class

WriteStreamClosedEventArgs Class

WriteStreamClosedEventHandler Delegate

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DownloadProgressChangedEventHandler Delegate

.NET Framework 4.5

Represents the method that will handle the WebClient.DownloadProgressChanged event of a WebClient.

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

type DownloadProgressChangedEventHandler = 
    delegate of  
        sender:Object * 
        e:DownloadProgressChangedEventArgs -> unit

Parameters

sender: Type: System.Object
The source of the event.

e: Type: System.Net.DownloadProgressChangedEventArgs
A DownloadProgressChangedEventArgs containing event data.

When you create a DownloadProgressChangedEventHandler 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. Events and Delegates

Note
If the server does not send the size of the downloaded file (such as in the case of a passive FTP connection), ProgressPercentage may always be zero.

The following code example demonstrates setting an event handler for the WebClient.DownloadProgressChanged event.

No code example is currently available or this language may not be supported.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

System.Net Namespace

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