Question

I have the following connection string:

<add name="DataContext" connectionString="DATA SOURCE=Server;
PASSWORD=123;USER ID=SYSTEM" providerName="Oracle.DataAccess.Client"/>

My business logic determine I need to read manually the connection string of the database:

class MyDbContext: DbContext
{
    public MyDbContext() : 
    base(ConfigurationManager.ConnectionStrings["DataContext"].ConnectionString){}
    ...
}

It works properly with Sql Server but when I change to a Oracle Connection string don’t works. It happens because the DbContext tries to use the Oracle ConnectionString to connect on a Sql Server Database because it dinn’t receive the providerName.

Anyone knows how to solve this problem?

Answer 1

To create a DbContext using Oracle without use WebConfig, your inheritance of DbContext must inject an Oracle Connection to base constructor:

class MyDbContext: DbContext
{
    public MyDbContext() : base(new OracleConnection("DATA SOURCE=Server; PASSWORD=123;USER ID=SYSTEM"){}
    ...
}