Begins an asynchronous request for a Stream object to use to write data.
(in System.Net.dll)
Visual Basic (Declaration)
Public Overrides Function BeginGetRequestStream ( _
callback As AsyncCallback, _
state As Object _
) As IAsyncResult
Dim instance As HttpWebRequest
Dim callback As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult
returnValue = instance.BeginGetRequestStream(callback, _
state)
public override IAsyncResult BeginGetRequestStream(
AsyncCallback callback,
Object state
)
| Exception | Condition |
|---|
| ProtocolViolationException | The Method property is GET. |
| InvalidOperationException | The stream is being used by a previous call to BeginGetRequestStream -or- The thread pool is running out of threads. |
| NotImplementedException | This method is not implemented. |
| NotSupportedException | The request cache validator indicated that the response for this request can be served from the cache; however, requests that write data must not use the cache. This exception can occur if you are using a custom cache validator that is incorrectly implemented. |
| WebException |
Abort was previously called. |
| ObjectDisposedException | In a .NET Framework application, a request stream with zero content length was not obtained and closed correctly. |
The BeginGetRequestStream method starts an asynchronous request for a stream used to send data for the HttpWebRequest. The asynchronous callback method uses the EndGetRequestStream method to return the actual stream.
You must use the BeginGetResponse method to retrieve the response. The IAsyncResult returned by the BeginGetResponse method does not support the AsyncWaitHandle property. If an application tries to access the AsyncWaitHandle property, a NotSupportedException is thrown.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
Reference