Error CS0246 The type or namespace name 'dataContextEntities' could not be found (are you missing a using directive or an assembly reference?)

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Error CS0246 The type or namespace name 'dataContextEntities' could not be found (are you missing a using directive or an assembly reference?)

B M-A 361

Hello,

I modified one entity in edmx file and updated Model from database and after that I get many errors of this type :
Error CS0246 The type or namespace name 'dataContextEntities' could not be found (are you missing a using directive or an assembly reference?)

I don't know how to fix it and what reference is missing.
How to check what is missing or what is wrong?

Best regards,

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Answer 1

Karen Payne MVP 35,586 Volunteer Moderator

Open the .edmx file as shown below, double click and see what the namespace is.

B M-A 361 Reputation points

2022-08-02T03:56:43.78+00:00

It seems that is missing .

I can not update the edmx file, because of this error.
Karen Payne MVP 35,586 Reputation points Volunteer Moderator

2022-08-02T06:53:05.647+00:00

In regards to I modified one entity in edmx file can you be specific how? One should never manually edit this file, always do edits in the database and then refresh code.
B M-A 361 Reputation points

2022-08-02T15:15:34.787+00:00

I observed that one entity has three primary keys and I edited on diagram after I made changes on database(changed primary from True to False).
I tried to update model from database but I get many errors.
Karen Payne MVP 35,586 Reputation points Volunteer Moderator

2022-08-02T15:48:37.687+00:00

First off, .EDMX files are notorious for corruption and if this is the case for yours's try and create a new diagram duplicating the current one, see if you get the same errors or not. If it gets errors than the original is corrupt and the new one is good than replace the current with the new one.

Otherwise if this was EF Core I would recommend using EF Power Tools which has no diagram but is a solid way to reverse engineer a database.
B M-A 361 Reputation points

2022-08-03T19:52:48.877+00:00

I replaced EDMX files ,Model and web.config files from an backup.
II deleted modified entity from diagram an I tried to update diagram.
I tried to add a new edmx file, but I have same problem , Edmx is not updating

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Error CS0246 The type or namespace name 'dataContextEntities' could not be found (are you missing a using directive or an assembly reference?)

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