efcore oracle

2. 引入Oracle.EntityFrameworkCore



3. 添加Model

[Table("T_SYS_USER")]
    public class User
    {
        [Key]
        public string USER_ID { get; set; }
    }

3. 添加上下文

public class SchemeContext : DbContext
    {
        public SchemeContext() : base()
        {

        }

        public SchemeContext(DbContextOptions options) : base(options)
        {
        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            //项目中改为从配置中读取数据库连接字符串
            optionsBuilder.UseOracle("Data Source=(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.1)(PORT = 1521)))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = Test)));User ID=test;Password=test;", f => f.UseOracleSQLCompatibility("12"));

            //日志
            var loggerFactory = new LoggerFactory();
            loggerFactory.AddProvider(new EFLoggerProvider());
            optionsBuilder.UseLoggerFactory(loggerFactory);
            base.OnConfiguring(optionsBuilder);
        }


        //public DbSet<UserTable> UserTable { get; set; }
        public DbSet<User> User { get; set; }
    }

4. 日志

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);

            //Console.WriteLine();
            //Console.ForegroundColor = ConsoleColor.Green;
            //Console.WriteLine(logContent);
            //Console.ResetColor();
            Trace.WriteLine(logContent);
            //}
        }

        public IDisposable BeginScope<TState>(TState state) => null;
    }

    public class EFLoggerProvider : ILoggerProvider
    {
        public ILogger CreateLogger(string categoryName) => new EFLogger(categoryName);
        public void Dispose() { }
    }