WebClient.DownloadData Method (String)


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

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

public byte[] DownloadData(
	string address


Type: System.String

The URI from which to download data.

Return Value

Type: System.Byte[]

A Byte array containing the downloaded resource.

Exception Condition

The address parameter is null.


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 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("\nPlease enter a URI (for example, 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.
byte[] myDataBuffer = myWebClient.DownloadData (remoteUri);

// Display the downloaded data.
string download = Encoding.ASCII.GetString(myDataBuffer);

Console.WriteLine("Download successful.");

.NET Framework
Available since 1.1
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