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WebClient.DownloadData Method (String)

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

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

'Declaration
Public Function DownloadData ( _
	address As String _
) As Byte()

Parameters

address
Type: System.String

The URI from which to download data.

Return Value

Type: System.Byte()
A Byte array containing the downloaded resource.

ExceptionCondition
ArgumentNullException

The address parameter is Nothing.

WebException

The URI formed by combining BaseAddress and address is invalid.

-or-

An error occurred while downloading data.

NotSupportedException

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.

NoteNote

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

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)

Console.WriteLine("Download successful.")

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, 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.

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