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 As String _
) As Byte()
Dim instance As WebClient
Dim address As String
Dim returnValue As Byte()

returnValue = instance.DownloadData(address)
public byte[] DownloadData (
	String address
public function DownloadData (
	address : String
) : byte[]
Not applicable.



The URI from which to download data.

Return Value

A Byte array containing the downloaded resource.

Exception typeCondition


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.

Console.Write(ControlChars.Cr + "Please enter a Url(for example, http://www.msn.com): ")
Dim remoteUrl As String = Console.ReadLine()
' Create a new WebClient instance.
Dim myWebClient As New WebClient()
' Download the home page data.
Console.WriteLine(("Downloading " + remoteUrl))
' DownloadData() method takes a 'uriRemote.ToString()' and downloads the Web resource and saves it into a data buffer.
Dim myDatabuffer As Byte() = myWebClient.DownloadData(remoteUrl)

' Display the downloaded data.
Dim download As String = Encoding.ASCII.GetString(myDataBuffer)

Console.WriteLine("Download successful.")

Console.Write("\nPlease enter a URI (e.g. http://www.contoso.com): ");
String remoteUri = Console.ReadLine();
// Create a new WebClient instance.
WebClient myWebClient = new WebClient();
// Download home page data.
Console.WriteLine("Downloading " + remoteUri);
// Download the Web resource and save it into a data buffer.
ubyte myDataBuffer[] = myWebClient.DownloadData(remoteUri);
// Display the downloaded data.
String download = Encoding.get_ASCII().GetString(myDataBuffer);

Console.WriteLine("Download successful.");

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.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0