This documentation is archived and is not being maintained.

WebClient.DownloadData Method (String)

Downloads the resource with the specified URI as a Byte array.

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

public function DownloadData(
	address : String
) : byte[]


Type: System.String

The URI from which to download data.

Return Value

Type: System.Byte[]
A Byte array containing the downloaded resource.


The URI formed by combining BaseAddress and address is invalid.


An error occurred while downloading data.


The method has been called simultaneously on multiple threads.

The DownloadData method downloads the resource with the URI specified by the address parameter. This method blocks while downloading the resource. To download a resource and continue executing while waiting for the server's response, use one of the DownloadDataAsync methods.

If the BaseAddress property is not an empty string ("") and address does not contain an absolute URI, address must be a relative URI that is combined with BaseAddress to form the absolute URI of the requested data. If the QueryString property is not an empty string, it is appended to address.

This method uses the RETR command to download an FTP resource. For an HTTP resource, the GET method is used.


This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing.

The following code example requests data from a server and displays the data returned. It assumes that remoteUri contains a valid URI for the requested data.

No code example is currently available or this language may not be supported.
Console::Write(S"\nPlease enter a URI (e.g. ");
String* remoteUri = Console::ReadLine();

// Create a new WebClient instance.
WebClient* myWebClient = new WebClient();
// Download home page data.
Console::WriteLine(S"Downloading {0}", remoteUri);
// Download the Web resource and save it into a data buffer.
Byte myDataBuffer[] = myWebClient->DownloadData (remoteUri);

// Display the downloaded data.
String* download = Encoding::ASCII->GetString(myDataBuffer);

Console::WriteLine(S"Download successful.");

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0