How can integrate MVCMiniProfiler with PetaPoco without changing the sources

问题

I'm trying to get MVCMiniProfiler to work with PetaPoco

I'm trying to set the connection in the creation of the PetaPoco DB, but run into problems (connectionClosed)

public class DbHelper
{
    static Database _CurrentDb = null;
    public static Database CurrentDb()
    {
        if (_CurrentDb == null)
        {
            string connstr = ConfigurationManager.ConnectionStrings["MainConnectionString"].ConnectionString;
            var conn = ProfiledDbConnection.Get(new SqlConnection(connstr));
            _CurrentDb = new PetaPoco.Database(conn);
        }
        return _CurrentDb;
    }

}

I've read this item https://github.com/toptensoftware/PetaPoco/issues/44 but can get it to work

What is the right way to do it?

Edit

The solution was provided by Gareth Elms:

public class DbHelper
{
    static Database _CurrentDb = null;
    public static Database CurrentDb()
    {
        if (_CurrentDb == null)
        {
            _CurrentDb = new DatabaseWithMVCMiniProfiler("MainConnectionString");
        }
        return _CurrentDb;
    }

}
public class DatabaseWithMVCMiniProfiler : PetaPoco.Database
{
    public DatabaseWithMVCMiniProfiler(IDbConnection connection) : base(connection) { }
    public DatabaseWithMVCMiniProfiler(string connectionStringName) : base(connectionStringName) { }
    public DatabaseWithMVCMiniProfiler(string connectionString, string providerName) : base(connectionString, providerName) { }
    public DatabaseWithMVCMiniProfiler(string connectionString, DbProviderFactory dbProviderFactory) : base(connectionString, dbProviderFactory) { }

    public override IDbConnection OnConnectionOpened( IDbConnection connection)
    {
        // wrap the connection with a profiling connection that tracks timings 
        return MvcMiniProfiler.Data.ProfiledDbConnection.Get( connection as DbConnection, MiniProfiler.Current);
    }
}

回答1:

I wonder if this is because it is a static class. It might be some weirdness around the connection being automatically closed after a request, and petapoco's _sharedConnectionDepth counter not knowing about it. I reproduced this easily using your code. Have a look at my sample petapoco app at github https://github.com/GarethElms/PetaPoco----A-simple-web-app all I do is instantiate Database in the base controller

回答2:

as Schotime mentioned, per request is the best for mvc applications. This is my impl using Ninject

private static void RegisterServices(IKernel kernel)
{


#if DEBUG
            kernel.Bind<IDatabase>().To<DebugDatabase>()
               .InRequestScope()
               .WithConstructorArgument("connectionStringName", "DebugCnnString");
#else
            kernel.Bind<IDatabase>().To<ReleaseDatabase>()
               .InRequestScope()
               .WithConstructorArgument("connectionStringName", "ReleaseCnnString");
#endif
}

public class DebugDatabase : PetaPoco.Database
{
    public DebugDatabase(string connectionStringName) : base(connectionStringName) { }

    public override IDbConnection OnConnectionOpened(IDbConnection connection)
    {
        // wrap the connection with a profiling connection
        return new ProfiledDbConnection(connection as DbConnection, MiniProfiler.Current);
    }
}

public class ReleaseDatabase : PetaPoco.Database
{
    public ReleaseDatabase(string connectionStringName) : base(connectionStringName)    {   }

    // ... some stuff
}

来源：https://stackoverflow.com/questions/7126205/how-can-integrate-mvcminiprofiler-with-petapoco-without-changing-the-sources

标签

mvc-mini-profiler

petapoco