2 // System.Web.EventHandlerTaskAsyncHelper.cs
5 // Kornel Pal (kornelpal@gmail.com)
7 // Copyright (C) 2014 Kornel Pal
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 using System.Threading.Tasks;
33 public sealed class EventHandlerTaskAsyncHelper
35 readonly TaskEventHandler taskEventHandler;
36 readonly BeginEventHandler beginEventHandler;
37 static readonly EndEventHandler endEventHandler = TaskAsyncResult.Wait;
39 public BeginEventHandler BeginEventHandler {
40 get { return beginEventHandler; }
43 public EndEventHandler EndEventHandler {
44 get { return endEventHandler; }
47 public EventHandlerTaskAsyncHelper (TaskEventHandler handler)
50 throw new ArgumentNullException ("handler");
52 taskEventHandler = handler;
53 beginEventHandler = GetAsyncResult;
56 IAsyncResult GetAsyncResult (object sender, EventArgs e, AsyncCallback callback, object state)
58 Task task = taskEventHandler (sender, e);
59 return TaskAsyncResult.GetAsyncResult (task, callback, state);