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HttpWebRequest.EndGetRequestStream Method (IAsyncResult, TransportContext%)

Ends an asynchronous request for a Stream object to use to write data and outputs the TransportContext associated with the stream.

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

public Stream EndGetRequestStream(
	IAsyncResult asyncResult,
	out TransportContext context
)

Parameters

asyncResult
Type: System.IAsyncResult

The pending request for a stream.

context
Type: System.Net.TransportContext%

The TransportContext for the Stream.

Return Value

Type: System.IO.Stream
A Stream to use to write request data.

ExceptionCondition
ArgumentException

asyncResult was not returned by the current instance from a call to BeginGetRequestStream.

ArgumentNullException

asyncResult is null.

InvalidOperationException

This method was called previously using asyncResult.

IOException

The request did not complete, and no stream is available.

WebException

Abort was previously called.

-or-

An error occurred while processing the request.

The EndGetRequestStream method completes an asynchronous request for a stream that was started by the BeginGetRequestStream method and outputs the TransportContext associated with the stream. After the Stream object has been returned, you can send data with the HttpWebRequest by using the Stream.Write method.

Some applications that use integrated Windows authentication with extended protection may need to be able to query the transport layer used by HttpWebRequest in order to retrieve the channel binding token (CBT) from the underlying TLS channel. The GetRequestStream method provides access to this information for HTTP methods which have a request body (POST and PUT requests). This is only needed if the application is implementing its own authentication and needs access to the CBT.

NoteNote:

If an application needs to set the value of the ContentLength property, then this must be done before retrieving the stream and writing data to it.

Caution noteCaution:

You must call the Stream.Close method to close the stream and release the connection for reuse. Failure to close the stream causes your application to run out of connections.

NoteNote:

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

Windows 7, Windows Server 2008 R2

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 SP1

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