WebRequest.BeginGetRequestStream Method
Microsoft Silverlight will reach end of support after October 2021. Learn more.
When overridden in a descendant class, provides an asynchronous method to request a stream.
Namespace: System.Net
Assembly: System.Net (in System.Net.dll)
Syntax
'Declaration
Public MustOverride Function BeginGetRequestStream ( _
callback As AsyncCallback, _
state As Object _
) As IAsyncResult
public abstract IAsyncResult BeginGetRequestStream(
AsyncCallback callback,
Object state
)
Parameters
- callback
Type: System.AsyncCallback
The AsyncCallback delegate.
- state
Type: System.Object
An object containing state information for this asynchronous request.
Return Value
Type: System.IAsyncResult
An IAsyncResult that references the asynchronous request.
Exceptions
| Exception | Condition |
|---|---|
| NotImplementedException | Any attempt is made to access the method, when the method is not overridden in a descendant class. |
Remarks
The BeginGetRequestStream method starts an asynchronous request for a stream used to send data to an Internet resource. The callback method that implements the AsyncCallback delegate uses the EndGetRequestStream method to return the request stream.
.gif "Note") Note: |
|---|
The WebRequest class is an abstract class. The actual behavior of WebRequest instances at run time is determined by the descendant class returned by the WebRequest.Create method. For more information about default values and exceptions, see the documentation for the descendant classes, such as HttpWebRequest. |
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.