2020 年 5月 28 日随笔档案 - 淡然→笑

2020年5月28日 #

Attaching an entity of type 'xxx' failed because another entity of the same type already has the same primary key value

摘要： Attaching an entity of type 'xxx' failed because another entity of the same type already has the same primary key value. This can happen when using th 阅读全文

posted @ 2020-05-28 13:40 淡然→笑阅读(1747) 评论(0) 推荐(0) 编辑

EF保存数据报错：An entity object cannot be referenced by multiple instances of IEntityChangeTracker.

摘要： EF保存关联表报错：An entity object cannot be referenced by multiple instances of IEntityChangeTracker. 字面理解就是一个实例对象不能被多个IEntityChangeTracker实例对象引用因为使用了Autofa 阅读全文

posted @ 2020-05-28 10:51 淡然→笑阅读(288) 评论(0) 推荐(0) 编辑

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Attaching an entity of type 'xxx' failed because another entity of the same type already has the same primary key value

EF保存数据报错：An entity object cannot be referenced by multiple instances of IEntityChangeTracker.