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15321874
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2013-03-10T11:50:52.240
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2014-04-23T11:17:51.883
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2014-04-23T11:17:51.883
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There a few things to take care about "async" are as follows : <ul> <li>The method should only be "async" when it needs to wait for the action to be performed by the code written in that.</li> <li>if there is nothing to be "await" in the method, than that method should not declared as "async".</li> <li>if there is any event (or else event handler) to be marked as async then return type should be "void" or any specific return type</li> <li>but if any other (general) method should marked as "async" then the return type should be <code>Task</code> or <code>Task< return-type ></code> .</li> </ul> Now coming to your questions, <ul> <li>definitely you can mark "Controller", "Event" & "Page" as async (I'm not damn sure about marking the page as async coz i never used it) and by that those method will take rest until the action will be performed completely written in that method.</li> <li>And that's the actual system to encapsulate whole the initialization logic in a viewModel. <ul> <li>for that make a Floder, named it as "ViewModels" and put all of the viewModel Codes in that folder and whenever needed, use that.</li> </ul></li> </ul> You should put your this code in a ViewModel: <pre><code>private async void SetData(TestDataWebServiceHelper service) { listA = await this.SetListA(service); listB = await this.SetListB(service); } private async Task<IEnumerable<SelectListItem>> SetListA(TestDataWebServiceHelper service) { List<String> rawList = new List<String>(); rawList = await service.GetValuesAsync("json"); return rawList.Select(x => new SelectListItem { Text = x, Value = x }); } private async Task<IEnumerable<SelectListItem>> SetListB(TestDataWebServiceHelper service) { List<String> rawList = new List<String>(); rawList = await service.GetValuesAsync("json"); return rawList.Select(x => new SelectListItem { Text = x, Value = x }); } </code></pre> and then you should call it whenever needed. (Hope this helps...)
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