c# - 当前上下文中不存在名称 'AntiForgery'

Question

我正在尝试在我的 Web Api 中实现 Antifrogery token ，但出现以下错误:

名称“AntiForgery”在当前上下文中不存在。

这是我的代码:

using System.Threading;
using System.Threading.Tasks;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
namespace MyAPI
{
[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public sealed class ValidateAntiForgeryTokenAttribute: FilterAttribute
{

    public Task<HttpResponseMessage> ExecuteAuthorizationFilterAsync(HttpActionContext actionContext, CancellationToken cancellationToken, Func<Task<HttpResponseMessage>> continuation)
    {
        try
        {
            string cookieToken = "";
            string formToken = "";
            //I am getting error on the line written below for  "AntiForgery":
            AntiForgery.Validate(cookieToken, formToken);
        }
        catch
        {
            actionContext.Response = new HttpResponseMessage
            {
                StatusCode = HttpStatusCode.Forbidden,
                RequestMessage = actionContext.ControllerContext.Request
            };
            return FromResult(actionContext.Response);
        }
        return continuation();
    }

    private Task<HttpResponseMessage> FromResult(HttpResponseMessage result)
    {
        var source = new TaskCompletionSource<HttpResponseMessage>();
        source.SetResult(result);
        return source.Task;
    }
 }
}

Answer 1

namespace System.Web.Helpers 存在于某些程序集中。

您必须将 System.Web.WebPages 程序集添加到您的项目中，然后像这样添加一个新的 using 语句:

解决方案资源管理器 -> [项目] -> 引用 ->(右键单击)添加引用... -> 扩展(选项卡)-> System.Web.WebPages -> 添加

using System.Web.Helpers;