ApplicationUser在Asp.Net Core 2.0中的ActionFilter中？

Question

How can I access the current ApplicationUser (or UserManager ) within an ActionFilter in Asp.Net Core 2.0?

I am trying to lock down the entire application until the user accepts the EULA (End User License Agreement), changes their password, and fills out required personal information.

public class ApplicationUser : IdentityUser
{
    ...
    public DateTime? DateEULAAccepted { get; set; }
    ...
}

Here is the ActionFilter code:

public class ProfileRequiredActionFilter : IActionFilter
{
    public void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (filterContext.HttpContext.User.Identity.IsAuthenticated)
        {
            var CurUser = UserManager<ApplicationUser>.GetUserAsync(filterContext.HttpContext.User);
            ...
            if (CurUser.Result.DateEULAAccepted.ToString() == null)
            {
                filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary(new { controller = "Account", action = "AgreeToEULA" }));
            }
            ...
        }
    }
}

I am instantiating the ActionFilter in the Startup > ConfigureServices as follows:

...
    services.AddMvc(options =>
    {
        options.Filters.Add(new ProfileRequiredActionFilter());
    });
...

Answer 1

Try adding your filter in ConfigureServices() as follows:

services.AddMvc(options => { 
    options.Filters.Add<ProfileRequiredActionFilter>(); 
});

You can then inject your UserManager into the filter as follows:

public class ProfileRequiredActionFilter : IActionFilter
{
    private UserManager<ApplicationUser> _userManager;

    public ProfileRequiredActionFilter(UserManager<ApplicationUser> userManager)
    {
        _userManager = userManager
    }

    public void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (filterContext.HttpContext.User.Identity.IsAuthenticated)
        {
            var CurUser = _userManager<ApplicationUser>.GetUserAsync(filterContext.HttpContext.User);
            ...
            if (CurUser.Result.DateEULAAccepted.ToString() == null)
            {
                filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary(new { controller = "Account", action = "AgreeToEULA" }));
            }
            ...
        }
    }
}