"Microsoft.Owin.IOwinContext"不包含"GetUserManager"的定义且没有扩展方法? [英] 'Microsoft.Owin.IOwinContext' does not contain a definition for 'GetUserManager' and no extension method?

问题描述

以下代码是从Asp.Net Identity 2.0示例中复制的.

The following code is copied from the Asp.Net Identity 2.0 sample.

private ApplicationUserManager _userManager;
public ApplicationUserManager UserManager
{
    get
    {
        return // Error 
          _userManager ?? HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();
    }
    private set
    {
        _userManager = value;
    }
}

但是会出现以下错误吗?

However it gets the following error?

错误3'Microsoft.Owin.IOwinContext'不包含'GetUserManager'的定义，并且找不到扩展方法'GetUserManager'接受类型为'Microsoft.Owin.IOwinContext'的第一个参数(您是否缺少使用指令还是程序集引用?)

Error 3 'Microsoft.Owin.IOwinContext' does not contain a definition for 'GetUserManager' and no extension method 'GetUserManager' accepting a first argument of type 'Microsoft.Owin.IOwinContext' could be found (are you missing a using directive or an assembly reference?)

更新:

Microsoft.AspNet.Identity.Owin.dll的版本2已存在于... \ packages \ Microsoft.AspNet.Identity.Owin.2.0.1 \ lib \ net45中.

The version 2 of Microsoft.AspNet.Identity.Owin.dll already exists in ...\packages\Microsoft.AspNet.Identity.Owin.2.0.1\lib\net45.

但是，在我的项目和示例之间，HttpContext.GetOwinContext()的视图定义是不同的.我项目的前三行是

However, the view definition of HttpContext.GetOwinContext() are different between my project and the sample. The first three lines of my project are

#region Assembly Microsoft.Owin.Host.SystemWeb.dll, v2.0.0.0
// C:\......\packages\Microsoft.Owin.Host.SystemWeb.2.0.0\lib\net45\Microsoft.Owin.Host.SystemWeb.dll
#endregion

样本为

#region Assembly Microsoft.Owin.Host.SystemWeb.dll, v2.1.0.0
// C:\....\sample\packages\Microsoft.Owin.Host.SystemWeb.2.1.0\lib\net45\Microsoft.Owin.Host.SystemWeb.dll
#endregion

但是我已经使用Neget将所有Owin Nuget软件包更新为最新版本.

But I already updated all Owin Nuget packages to the newest version using Neget.

推荐答案

扩展方法已移至其他命名空间，请尝试添加

The extension method was moved to a different namespace, try adding

using Microsoft.AspNet.Identity.Owin;

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