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60 lines
3.6 KiB
60 lines
3.6 KiB
<HTML><HEAD><TITLE>Microsoft.FSharp.Control.AsyncExtensions</TITLE><link rel="stylesheet" type="text/css"href="../msdn.css"></link></HEAD><BODY>
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<br><dl>
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<dt></dt><dd>
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<h1>[<a href='../namespaces.html'>Home</a>] Module <a href='Microsoft.FSharp.Control.html'>Microsoft.FSharp.Control</a>.AsyncExtensions </h1><br>
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</dd>
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<dt></dt><dd>
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<table>
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<tr valign='top'><td><summary>
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Extensions to the F# Microsoft.FSharp.Control.Async module
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</summary>
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<dt><h3>Extension Members</h3></dt><dd>
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<table width="100%%">
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<tr><th width=60%>Extension Member</th><th>Description</th></tr>
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<tr valign="top"><td><pre>member
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AsBeginEnd : computation:<a href='../FSharp.Core/Microsoft.FSharp.Control.type_Async-1.html'>Async</a><'T> ->
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(<a href='http://msdn2.microsoft.com/en-us/library/System.AsyncCallback.aspx'>AsyncCallback</a> * <a href='../FSharp.Core/Microsoft.FSharp.Core.type__obj.html'>obj</a> -> <a href='http://msdn2.microsoft.com/en-us/library/System.IAsyncResult.aspx'>IAsyncResult</a>) * (<a href='http://msdn2.microsoft.com/en-us/library/System.IAsyncResult.aspx'>IAsyncResult</a> -> 'T) *
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(<a href='http://msdn2.microsoft.com/en-us/library/System.IAsyncResult.aspx'>IAsyncResult</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__unit.html'>unit</a>)</pre></td><td><summary>
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Return three functions that can be used to implement the .NET Asynchronous
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Programming Model (APM) for a given asynchronous computation.
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The functions should normally be published as members with prefix 'Begin',
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'End' and 'Cancel', and can be used within a type definition as follows:
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<tt>
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let beginAction,endAction,cancelAction = Async.AsBeginEnd computation
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member x.BeginSomeOperation(callback,state) = beginAction(callback,state)
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member x.EndSomeOperation(iar) = endAction(iar)
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member x.CancelSomeOperation(iar) = cancelAction(iar)
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</tt>
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The resulting API will be familiar to programmers in other .NET languages and
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is a useful way to publish asynchronous computations in .NET components.
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</summary></td></tr>
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<tr valign="top"><td><pre>member
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AwaitEvent : <a href='../FSharp.Core/Microsoft.FSharp.Control.type_IEvent-2.html'>IEvent</a><'Delegate,'T> * ?cancelAction:(<a href='../FSharp.Core/Microsoft.FSharp.Core.type__unit.html'>unit</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__unit.html'>unit</a>) ->
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<a href='../FSharp.Core/Microsoft.FSharp.Control.type_Async-1.html'>Async</a><'T> (requires delegate and 'Delegate :> <a href='http://msdn2.microsoft.com/en-us/library/System.Delegate.aspx'>Delegate</a>)</pre></td><td><summary>
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Return an asynchronous computation that waits for a single invocation of a .NET event by
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internally adding a handler to the event. Once the computation completes or is cancelled, the
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handler is removed from the event.
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The computation will respond to cancellation while waiting for the completion
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of the operation. If 'cancelAction' is specified, cancellation causes the given
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function to be executed. The computation then continues to wait for the event.
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If 'cancelAction' is not specified, then cancellation causes the computation
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to stop immediately, and if the event is subsequently raised it may
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be ignored.
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</summary></td></tr>
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</table>
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</dd>
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</td></tr>
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<tr valign='top'><td>
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<dt><h3>See Also</h3></dt><dd>
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<a href="Microsoft.FSharp.Control.html">Microsoft.FSharp.Control</a> </dd>
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</td></tr>
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</table>
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</dd>
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</dl>
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<br /> <br/><p><i>Documentation for assembly FSharp.PowerPack, version 1.9.6.16, generated using <a href='http://research.microsoft.com/fsharp/'>F# Programming Language</a> version 1.9.6.16</i></p>
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</BODY></HTML>
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