Linq:当我尝试使用FK关系更改字段值时发生错误更新 [英] Linq:error update when I try to change field value with a FK relation

问题描述

您好，您怎么看待这个错误?
我正在使用Linq技术(DataContext类e linqDBClass.dbml)
当我尝试更新记录时遇到此错误:
由于对象的当前状态，操作无效"
更新工作正常，除非在这种情况下:
当我尝试更改字段值E1_Code(FK关系)时.

Hello,what do you think about this error?
I''m using Linq technologies (DataContext class e linqDBClass.dbml)
When I try to update a record I faced this error:
"Operation is not valid due to the current state of the object"
Update works fine except in this case:
When I try to change field value E1_Code(FK relation).

Entity1
E1_ID
E1_Attibute
E1_Code (FK -->E1_Code on E2_Code)
 
Entity2
E2_Code
E2_Description

我怎么解决这个问题?

请帮帮我.

How can I solve this problem?

Please help me.
Thanks

推荐答案

您必须先分离对象，然后才能更改导航属性.尽管这并不简单.从此处开始: LINQ to SQL-分离实体 [

You have to detach the object before changing navigation property. Although this is not straightforward. Start here: LINQ to SQL - Detach Entities[^]

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