'System.Web.HttpContext'不包含'GetOwinContext'的定义

I have the following error :'System.Web.HttpContext' does not contain a definition for 'GetOwinContext' whenever I debug my project. this error is in the web API page, although it doesn't show an error in the default AccounController.cs and the nuget package is installed.what is missing?

我有以下错误：每当我调试我的项目时，'System.Web.HttpContext'都不包含'GetOwinContext'的定义。此错误发生在Web API页面中，虽然它在默认的AccounController.cs中没有显示错误并且安装了nuget包。缺少什么？

using IdentitySample.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.Owin.Security;
using System.Web;
using System.Threading.Tasks;
using task.Models;
using System.Globalization;
public ApplicationUserManager UserManager
    {
        get
        {
            return _userManager ?? HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();

        }
        private set
        {
            _userManager = value;
        }
    }

1 个解决方案

#1

ok I found the solution since I already installed the nuget package all I have to do is the following:

好的，我找到了解决方案，因为我已经安装了nuget包，我所要做的就是以下内容：

  return _userManager ?? HttpContext.**current**.GetOwinContext().GetUserManager<ApplicationUserManager>();