CODEWITHSUNDEEP
c#asp.net-core-3.1
phil123456
phil123456

Reputation: 1648

.NET Core - IAuthorizationFilter not found

I try to create a filter with .NET Core 3.1

for some weird reason, many things cannot be found

The type or namespace name 'FilterAttribute' could not be found (are you missing a using directive or an assembly reference?)

first, System.Web.Mvc could not be found, so I uninstalled, reinstalled the microsoft apsnet mvc package

but I still get the same issue

using Microsoft.AspNetCore.Mvc.Filters;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Web.Mvc.Filters;

namespace MyApp.Filters
{
    public class CustomAuthorizationAttribute : FilterAttribute, IAuthorizationFilter
    {
        void IAuthorizationFilter.OnAuthorization(AuthorizationContext filterContext)
        {
            ...
        }
    }
}

thanks for helping me on this

enter image description here

Upvotes: 0

Views: 1800

Answers (2)

phil123456
phil123456

Reputation: 1648

so apparently the examples I found are not .NET Core (???)

I found another doc from Microsoft that says to use IAsyncPageFilter, IOrderedFilter instead

Upvotes: 0

Ian Kemp - SE killed by LLMs
Ian Kemp - SE killed by LLMs

Reputation: 29929

I don't think you understand how ASP.NET Core works. There is no System.Web.Mvc.Filters namespace and no FilterAttribute; any MVC-related packages relate to legacy ASP.NET and are therefore incompatible with Core (hence why you cannot use that namespace), so there's no point in installing them.

If you have an ASP.NET MVC application and you want to upgrade it to Core, you should read the document that Microsoft has prepared for exactly that.

Upvotes: 2

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