Linq:error update when I try to change field value with a FK relation

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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

How can I solve this problem?

Please help me.
Thanks

Posted 11-Sep-12 5:44am

Max Larsen

Updated 11-Sep-12 5:50am

Sandeep Mewara

v2

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**Zoltán Zörgő** · Answer 1 · 2012-09-11T07:17:00

Solution 1

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

Posted 11-Sep-12 7:17am

Zoltán Zörgő

Comments

Max Larsen 12-Sep-12 4:01am

I suspected a solution like this.
It is not easy especially because the development is well along.
Thank you very much Zoltan
Max

Zoltán Zörgő 15-Sep-12 4:59am

Any progress?