How can I change StoreGeneratedPattern and force E

问题:

I have server and client database where I need to keep some of the server data in sync with client dataabse. Database schema is same apart from having IDENTITY(1,1) on server.

Data can be created on server only. It has to be inserted on client with using server's id.

CREATE TABLE [MyServer].[dbo].[Test1](
[Test1Id] [int] IDENTITY(1,1) NOT NULL,
[Test1Value] [datetime] NOT NULL,
CONSTRAINT [PK_Test1] PRIMARY KEY CLUSTERED ( [Test1Id] ASC ) ) ON [PRIMARY]

CREATE TABLE [MyClient].[dbo].[Test1](
[Test1Id] [int] NOT NULL,
[Test1Value] [datetime] NOT NULL,
CONSTRAINT [PK_Test1] PRIMARY KEY CLUSTERED ( [Test1Id] ASC ) ) ON [PRIMARY]

Is there any way to change StoreGeneratedPattern for entity classes without rebuilding assembly so I can insert IDENTITY on client side? I spent some time looking into

EntityModelCodeGenerator

but without any success.

Of course I run server and client in different app domain so I can do this change on startup.

I am using default EntityFramework classes. I can change to POCO entities if it resolves my problem. Classes are simple and referenced by id's instead of NavigationProperties.

Thanks

回答1:

I found one solution which will enable me to run client and server from same solution but it is VERY hacky and I will try to avoid. I will be better of changing int's to GUID's generated in code and there fore removing StoreGeneratedPattern="Identity" server as well.

Solution would be to have a post build event on my CLIENTs project which does:

1. Removes StoreGeneratedPattern="Identity" from my EDMX file on targeted classes.
2. Build project containing EDMX file.
3. Copy dll's to CLIENTs project.
4. Restoring original server dll and edmx files.

Is there any better solution? You see how far I am willing to go so GUID's seem like a better solution for me. Le me know if I am missing something.

回答2:

My final solution is to remove StoreGeneratedPattern="Identity" on both sides (Client/Server) and generate object Id in a code before inserting into DB. This way my code can stay client/server agnostic and only creates ID for default value.