Bisakah saya memecat acara di database koneksi di Entity Framework Core?

Anda seharusnya dapat melakukannya dengan meneruskan koneksi ke DbContext . Anda dan mengaitkan StateChange event:(Maafkan contoh SQLite. Saya tahu Anda mengatakan PostgreSQL.)

var connection = new SqliteConnection(connectionString);
_connection.StateChange += (sender, e) =>
{
    if (e.OriginalState != ConnectionState.Open)
        return;

    var senderConnection = (DbConnection)sender;

    using (var command = senderConnection.CreateCommand())
    {
        command.Connection = senderConnection;
        command.CommandText = "-- TODO: Put little SQL command here.";

        command.ExecuteNonQuery();
    }
};

optionsBuilder.UseSqlite(connection);