The instance of entity type 'xxxx' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked.

本文轉載自查看原文 2019-05-07 11:32 1652 解決問題

一、問題描述

　　問題：The instance of entity type 'xxxx' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached.

二、解決方案

　　就是把插入的主鍵自動賦值即可 id=SequentialGuidGenerator.Instance.Create();

三、示例

免責聲明！

本站轉載的文章為個人學習借鑒使用，本站對版權不負任何法律責任。如果侵犯了您的隱私權益，請聯系本站郵箱yoyou2525@163.com刪除。

猜您在找 The instance of entity type 'Menu' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. The instance of entity type 'xxx' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. The instance of entity type 'XXX' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked The instance of entity type 'XXX' cannot be tracked because another instance with the same key value for {'XX'} is already being tracked. [轉] EF cannot be tracked because another instance of this type with the same key is already being tracked EF 更新實體 The instance of entity type 'BabyEvent' cannot be tracked because another instance Attaching an entity of type 'xxx' failed because another entity of the same type already has the same primary key value Attaching an entity of type 'xxx' failed because another entity of the same type already has the same primary key value. ASP.NET MVC another entity of the same type already has the same primary key value Another server instance in same directory is already running