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Async suffix for controller action names will be trimmed by default #351

pranavkm opened this Issue Apr 2, 2019 · 1 comment


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pranavkm commented Apr 2, 2019

As part of addressing aspnet/AspNetCore#4849, ASP.NET Core MVC will trim the suffix Async from action names by default. This affects routing and link generation.


public class ProductController : Controller
    public async IActionResult ListAsync()
        var model = await DbContext.Products.ToListAsync();
        return View(model);

Prior to 3.0, the action will be routeable via Product/ListAsync. Link generation would require specifying the Async suffix e.g.

<a asp-controller="Product" asp-action="ListAsync">List</a>

In 3.0, the action will be routeable via Product/List and link generation would require not specifying the Async suffix e.g.

<a asp-controller="Product" asp-action="List">List</a>

This change does not affect names specified using the ActionNameAttribute. This behavior can be disabled by setting MvcOptions.SuppressAsyncSuffixInActionNames to false as part of the application startup:

services.AddMvc(options =>
   options.SuppressAsyncSuffixInActionNames = false; 

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pranavkm commented Apr 2, 2019

Please use aspnet/AspNetCore#8998 for further discussions.

@aspnet aspnet locked and limited conversation to collaborators Apr 2, 2019

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