How to log queries using Entity Framework 7?

Question

I am using Entity Framework 7 on the nightly build channel (right now I\'m using version EntityFramework.7.0.0-beta2-11524) and I\'m trying to log the queries that EF genera

Answer 1

I think I figured this out. With the current EF7 bits, ILoggerFactory is registered with the dependency injection container which EF is using. You can get a reference to the container, which is an IServiceProvider, via the ScopedServiceProvider property of DbContext when it is cast to IDbContextServices. From there, you can get the ILoggerFactory and configure it using the AddToConsole extension method from the Microsoft.Framework.Logging.Console NuGet package.

public static void LogToConsole(this DbContext context)
{
    // IServiceProvider represents registered DI container
    IServiceProvider contextServices = ((IDbContextServices)context).ScopedServiceProvider;

    // Get the registered ILoggerFactory from the DI container
    var loggerFactory = contextServices.GetRequiredService();

    // Add a logging provider with a console trace listener
    loggerFactory.AddConsole(LogLevel.Verbose);
}

Here is a gist I created for this snippet: https://gist.github.com/tonysneed/4cac4f4dae2b22e45ec4