EF Code 如何输出sql语句
首先写拷贝下面类
public class EFLoggerProvider : ILoggerProvider { public ILogger CreateLogger(string categoryName) => new EFLogger(categoryName); public void Dispose() { } } public class EFLogger : ILogger { private readonly string categoryName; public EFLogger(string categoryName) => this.categoryName = categoryName; public bool IsEnabled(LogLevel logLevel) => true; public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter) { //ef core执行数据库查询时的categoryName为Microsoft.EntityFrameworkCore.Database.Command,日志级别为Information if (categoryName == "Microsoft.EntityFrameworkCore.Database.Command" && logLevel == LogLevel.Information) { var logContent = formatter(state, exception); //TODO: 拿到日志内容想怎么玩就怎么玩吧 Console.WriteLine(); Console.ForegroundColor = ConsoleColor.Green; Console.WriteLine(logContent); Console.ResetColor(); } } public IDisposable BeginScope<TState>(TState state) => null; }
然后在dbcontext里面,应用日志
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { var loggerFactory = new LoggerFactory(); loggerFactory.AddProvider(new EFLoggerProvider()); optionsBuilder.UseLoggerFactory(loggerFactory); base.OnConfiguring(optionsBuilder); }