Async controller in ASP.NET MVC

Question

I checked the System.Web.Mvc.AsyncController in MVC 4.0, it has the comment "Provided for backward compatibility with ASP.NET MVC 3." does this mean there is a new implementation of async controller in MVC 4? what's the correct way in MVC 4.0 enable async a controller in order to put the I/O intense operations in other thread pool other than IIS request thread pool?

tugberk · Accepted Answer · 2012-11-09 06:57:28Z

14

Starting from ASP.NET MVC 4, you can now use the System.Web.Mvc.Controller class as the base class and leverage the TAP (Task-based Asynchronous Pattern):

public async Task<ViewResult> Index() { 

     return View(await GetThingsAsync());
}

Note that you don't have to use async and await keywords which come with C# 5.0 but they make asynchronous programming much, much easier and more maintainable.

Have a look at the following articles:

edited Nov 9, 2012 at 6:57

answered Nov 9, 2012 at 6:51

tugberk

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2 Comments

Spook Over a year ago

Doesn't async and await come with C# 4.5, not 5.0?

tugberk Over a year ago

@Spook there's no C# 4.5: en.wikipedia.org/wiki/C_Sharp_(programming_language)#Versions async/await language support came with C# 5.0 and it also needs .NET 4.5. You may use .NET 4.0 and leverage the async/await language features with a NuGet package from the BCL team: nuget.org/packages/Microsoft.Bcl.Async

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