I have a .net core project where i am using entity framework db first connecting to sql server which is working fine, now i have similar set of tables in oracle can i just run the project by changing connection string and provider to oracle? Or any major rework is needed to make this work?
You need to regenerate the DbContext mappings using reverse engineering
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I am want to start a new project using entity framework 6. I have decided to use Database First approach. I want to know if it is possible to use Oracle database for my new project with entity framework?
It's not a matter of Entity Framework supporting Oracle. It's the other way around. Entity Framework supports any data source, as long as a provider is written for it. You need to install an Oracle provider with EF support. If I'm not mistaken, the latest version of ODP.NET, which is downloadable from Oracle, has EF support. It will generate a model from a database but whether it will go the other way, I don't know.
Yes it possible. And here you can find a tutorial about it from Oracle .
Is there any chance to use ASP.NET Identity with Entity Framework while connecting to an Oracle database?
The challenge seems to be some version conflicts:
The Oracle Data Provider for .NET only targets Entity Framework 5 but not Entity Framework 6.
The NuGet package Microsoft.AspNet.Identity.EntityFramework targets EF6, not EF5.
It's not the code first feature that troubles me. It's getting the connection up and running and reading my user identity data from the Oracle database that bugs me.
Any pointers are much appreciated.
The solution is, of course, in implementing an UserStore class for the IUserStore (and IUserPasswordStore and IUserClaimStore and whatever one needs) interfaces.
Therein, it's just plain EF5 code that queries and updates the ASP.NET Identity tables.
Using this, the UserManager works just fine for accessing all identity data.
I succeeded in code first approach for SQL in mvc4 application. But when I want to apply code first approach for Oracle then i am getting below message:
No Entity Framework provider found for the ADO.NET provider with invariant name
'Oracle.DataAccess.Client'. Make sure the provider is registered in the
'entityFramework' section of the application config file
Right now I am using Entity framework 6. Please let me know what is the simple step to create database using code first approach for ORACLE. Which "ddl" is required? What is web config setting?
You need to specify a provider for your Oracle DB, and there is no native provider,you need a third party one.
Here you have an "official" list of all the entity framework providers for different databases. Note that there is one from Oracle, that can also be installed as a Nuget package.
NOTE from Oracle docs:
Entity Framework 6 is not supported at this time. Some Visual Studio versions may default to Entity Framework 6. If so, set your .NET project to use an earlier version of Entity Framework.
DevArt dot connect supports all versions of EF.
So, to use the ODP you need to downgrade to EF5, or purchase dotConnect.
The details for configuring your web.config, or app.config can be found here: Deploying and Configuring ODP.NET to work without installation with Entity Framework
Starting with Oracle Data Access Components (ODAC) 12c Release 3 (12.1.0.2.1), ODP.NET supports Code First and Code First Migrations from Entity Framework 6. ODP.NET provides the data access to store the EF model inside the Oracle Database and evolve it.
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/dotnet/CodeFirst/index.html#section1
I was having trouble finding a path/resource to the query if oracle is supported by Entity framework.
If it does ... which of the following Workflows does it support?
Model First
Database First
Code first(new database)
Code first (Existing database)
Kindly also mention the resource where I can learn Entity framework that has support for oracle.
Is it possible to use the DataContext class to connect to an Oracle DB?
I am reading some examples on MSDN
I need an example where the context is used to connect to Oracle.
DataContexts are specific to LINQ-to-SQL and thus SQL Server. If you want an ORM for Oracle, you need to look at alternatives like the Microsoft Entity Framework or NHibernate.