Multiple dbContexts in ASP.NET vNext and EF7

Question

I\'m trying to get along with building web systems with ASP.NET vNext using MVC 6 and EF7. I\'m looking at this tutorial: http://stephenwalther.com/archive/2015/01/17/asp-net-5-

Answer 1

First of all, in something like config.json you can add yur connection strings. Something like the following will work

  "Data": {
    "BlogData": { "ConnectionString": "Server=tcp:YourHostname.net,1433;Database=YourDatabaseName;User ID=YourDBUser@YourDomain;Password=YourPassword;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;" },
    "Identity": { "ConnectionString": "Server=tcp:YourHostname.net,1433;Database=YourDatabaseName;User ID=YourDBUser@YourDomain;Password=YourPassword;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;" }
  },

You then have two DBContexts. Let's say: YourApp.AppDBContext and YourApp.AppIdentityDBContext

You need to include these at the top of your CS file of course.

using YourApp.AppDBContext;
using YourApp.AppIdentityDBContext;

In startup.cs for example, in the startup method, your configuration builder will look like this:

    var builder = new ConfigurationBuilder()
        .AddJsonFile("config.json")
        .AddJsonFile($"config.{env.EnvironmentName}.json", optional: true);
    builder.AddEnvironmentVariables();
    Configuration = builder.Build();
}

In the ConfigureServices method you will add your DBContexts as follows:

    services.AddEntityFramework()
        .AddSqlServer()
        .AddDbContext(options =>
            options.UseSqlServer(Configuration["Data:BlogData:ConnectionString"]))
        .AddDbContext(options =>
            options.UseSqlServer(Configuration["Data:Identity:ConnectionString"]));

I hope this helps. Feel free to give me a shout if I can expand on this further.