Simple Logging
Improve EF Core performance with EF Extensions
Simple Logging
Simple Logging is the equivalent of Database.Log in EF6. It provides a simple way to get logs from EF Core without the need to configure any kind of external logging framework.
EF Core replaces Database.Log with a LogTo method called on DbContextOptionsBuilder in either AddDbContext or OnConfiguring.
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
=> optionsBuilder.LogTo(Console.WriteLine);There are multiple overloads available which can be used in different use cases.
Set the minimum log level
Example:
.LogTo(Console.WriteLine, LogLevel.Information)
Filter for only specific events:
Example:
.LogTo(Console.WriteLine, new[] {CoreEventId.ContextInitialized, RelationalEventId.CommandExecuted})
Filter for all events in specific categories:
Example:
.LogTo(Console.WriteLine, new[] {DbLoggerCategory.Database.Name}, LogLevel.Information)
Use a custom filter over event and level:
Example:
.LogTo(Console.WriteLine, (id, level) => id == RelationalEventId.CommandExecuting)
Output format can be minimally configured (API is in flux) but the default output looks something like:
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