WebClient.OpenWrite Method (Uri, String)

Note: This method is new in the .NET Framework version 2.0.

Opens a stream for writing data to the specified resource, by using the specified method.

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

Stream^ OpenWrite (
	Uri^ address, 
	String^ method
public Stream OpenWrite (
	Uri address, 
	String method
public function OpenWrite (
	address : Uri, 
	method : String
) : Stream



The URI of the resource to receive the data.


The method used to send the data to the resource. If null, the default is POST for http and STOR for ftp.

Return Value

A Stream used to write data to the resource.

Exception typeCondition


The URI formed by combining BaseAddress, and address is invalid.


An error occurred while opening the stream.

The OpenWrite method returns a writable stream that is used to send data to a resource. This method blocks while opening the stream. To continue executing while waiting for the stream, use one of the OpenWriteAsync 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 member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing.

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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