沒有給定參數對應於「IOwinContext.Get <T>（串）」

我試圖資料圖片添加到我的項目，我下面這篇文章 https://social.technet.microsoft.com/wiki/contents/articles/34445.mvc-asp-net-identity-customizing-for-adding-profile-image.aspx#Step_4_IdentityModels_cs 並在需要的形式參數的「鑰匙」文章中有一部分我必須獲取用戶的詳細信息來加載用戶的圖像。在這一步我在標題中得到錯誤，我錯過了什麼？沒有給定參數對應於「IOwinContext.Get <T>（串）」

public FileContentResult UserPhoto() 
    { 
     if (User.Identity.IsAuthenticated) 
     { 
      String userId = User.Identity.GetUserId(); 
      if (userId == null) 
      { 
       string filename = 
    HttpContext.Server.MapPath(@"~/Uploads/ProfilePictures/blankprofile.png"); 
       byte[] imageData = null; 
       FileInfo fileInfo = new FileInfo(filename); 
       long imageFileLength = fileInfo.Length; 
       FileStream fs = new FileStream(filename, FileMode.Open, 
       FileAccess.Read); 
       BinaryReader br = new BinaryReader(fs); 
       imageData = br.ReadBytes((int)imageFileLength); 
       return File(imageData, "image/png"); 
      } 
      // to get the user details to load user Image 
      var bdUsers = 
      HttpContext.GetOwinContext().Get<ApplicationDbContext>(); 
      var userImage = bdUsers.Users.Where(x => x.Id == 
      userId).FirstOrDefault(); 
      return new FileContentResult(userImage.ProfilePicture, 
      "image/jpeg"); 
     } 
     else 
     { 
      string fileName  =HttpContext.Server.MapPath(@"~/Uploads/ProfilePictures/blankprofile.png"); 

      byte[] imageData = null; 
      FileInfo fileInfo = new FileInfo(fileName); 
      long imageFileLength = fileInfo.Length; 
      FileStream fs = new FileStream(fileName, FileMode.Open, 
      FileAccess.Read); 
      BinaryReader br = new BinaryReader(fs); 
      imageData = br.ReadBytes((int)imageFileLength); 
      return File(imageData, "image/png");    
     } 

    }

來源

2017-11-04 Khanyisa Fante

https://stackoverflow.com/questions/類的Microsoft.aspnet.identity.owin NuGet包23881489/how-to-get-applicationdbcontext -out-of-owin-pipeline我需要添加一個使用語句，但我已經做了，根據intellisense，這是不必要的 –

錯誤是在讀取var bdUsers = 。HttpContext.GetOwinContext（）獲取（）; –

你要引用有具有get方法，你根據這個找

來源

2017-11-20 12:44:09

沒有給定參數對應於「IOwinContext.Get <T>（串）」

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