@helper directive no longer works out of the box in ASP.NET5 MVC6 beta4.

问题

Since I updated my ASP.NET5 project to beta4 (the one included with Visual Studio 2015 RC), any of my Razor views where I use a helper, such as:

@helper foo()
{
   <h2>Bar</h2>
}

results in the following error:

error CS0103: The name 'helper' does not exist in the current context.

Is the @helper directive no longer supported? Can someone point me to anything useful about the issue?

回答1:

The @helper directive was removed since beta 4 because it imposed too many restrictions on other Razor features: https://github.com/aspnet/Razor/issues/281.

Edit
To be clear: based on the discussion in the GitHub issue(s) Microsoft is not planning to bring the @helper directive back or replace it in ASP.NET Core.

回答2:

Rather than using a helper method, you can achieve the same functionality using a partial with a view model. Just pass the relevant arguments into the Html.Partial command.

来源：https://stackoverflow.com/questions/29970447/helper-directive-no-longer-works-out-of-the-box-in-asp-net5-mvc6-beta4